CN111330576A - Biomaterial-loaded bimetal Ag/BiVO4Bi flexible easily-recycled photocatalytic material, preparation method and application thereof - Google Patents
Biomaterial-loaded bimetal Ag/BiVO4Bi flexible easily-recycled photocatalytic material, preparation method and application thereof Download PDFInfo
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- 230000001699 photocatalysis Effects 0.000 title claims abstract description 74
- 239000000463 material Substances 0.000 title claims abstract description 63
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- 229910002915 BiVO4 Inorganic materials 0.000 claims abstract description 76
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(I) nitrate Inorganic materials [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims abstract description 42
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- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 claims 1
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- B01J35/39—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/66—Silver or gold
- B01J23/68—Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/682—Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with vanadium, niobium, tantalum or polonium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/36—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of vanadium, niobium or tantalum
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- B01J35/40—
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/04—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of inorganic compounds, e.g. ammonia
- C01B3/042—Decomposition of water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/02—Processes for making hydrogen or synthesis gas
- C01B2203/0266—Processes for making hydrogen or synthesis gas containing a decomposition step
- C01B2203/0277—Processes for making hydrogen or synthesis gas containing a decomposition step containing a catalytic decomposition step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Abstract
Biomaterial-loaded bimetal Ag/BiVO4The preparation method of the/Bi flexible easily-recycled photocatalytic material comprises the following steps: pretreating textile cloth in dopamine solution (PDA), and soaking in AgNO3And (4) obtaining the Ag/textile cloth composite material in the solution. With Bi (NO)3)3·5 H2O and NaVO3·2 H2Performing solvothermal reaction on O serving as a raw material at 180 ℃ for 8 h to obtain BiVO4Powder of at Ar/H2Annealing for 10 h at 350 ℃ in the atmosphere, and reducing the alloy into BiVO in situ4A Bi powder. Arranging Ag/textile on the BiVO4Depositing in a/Bi aqueous solution to obtain the biomaterial-loaded bimetal Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material. The invention takes cheap and easily obtained biological material woven cloth as a substrate, has simple preparation method and can be recycled, solves the problem of difficult recycling caused by powder and realizes the sustainable development of resources.
Description
Technical Field
The invention relates to the technical field of photocatalytic materials, in particular to a method for preparing a biomaterial-loaded bimetal Ag/BiVO4A method for preparing/Bi flexible easily-recycled photocatalytic material and application thereof.
Background
Semiconductor photocatalysis is a high-efficiency utilization technology of clean energy, has application in the aspects of photolysis water hydrogen production, carbon dioxide conversion, air purification, water degradation treatment and the like, and is expected to solve the problemThe world energy shortage and the environmental pollution problem. Because of the abundant bismuth output in China, the bismuth group photocatalyst has higher photocatalytic efficiency, thereby causing extensive attention of researchers. Bismuth vanadate (BiVO)4) The forbidden band width of the material is 2.3-2.4eV, the material can decompose water and degrade pollutants under visible light, and the material has the characteristics of wide photoresponse range, low carbon, environmental protection and no toxicity. However, the photodegradation efficiency is limited because the photo-generated electrons and holes are easily recombined and the quantum efficiency is low. Accordingly, BiVO with high photogenerated carrier separation efficiency, wide range of visible light response and low cost is developed4Matrix composites remain of great interest and challenge.
The performance and application of a single semiconductor material generally have great limitations and cannot meet various requirements of actual production. By loading metals or metal oxides, e.g. V, on their surfaces2O5/BiVO4、Cu/BiVO4、CeO2/BiVO4And the like, a built-in electric field is formed in the material to promote the separation of photon-generated carriers, thereby improving the photocatalytic activity.
Recently, noble metal photocatalysts have become the focus of current research, such as Au/TiO2、TiO2/Ag-Ag2S and the like, the plasma resonance (SPR) effect of the noble metal is utilized, the carrier transmission rate of the noble metal can be improved, the photon-generated electron-hole recombination is inhibited, and the purpose of better conversion from light energy to chemical energy is achieved.
Although these measures are effective in improving photocatalytic activity, the nanocomposite powder is difficult to recover during the application of photocatalytic water treatment, which causes secondary pollution and limits its practical application. Therefore, how to ensure the stability of the photocatalyst and reduce the difficulty of recovery is a problem to be solved at present.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a method for preparing a biomaterial-loaded bimetal Ag/BiVO4The preparation method is simple, recyclable and capable of radically recycling the biological material which is cheap and easy to obtain as a substrateThe powder is cut randomly according to actual use conditions, the problem of difficult recovery caused by powder is solved, and sustainable development and cyclic utilization of resources are realized.
In order to achieve the purpose, the invention adopts the technical scheme that:
biomaterial-loaded bimetal Ag/BiVO4The method for preparing the/Bi flexible easily-recycled photocatalytic material comprises the following steps: pretreating textile cloth in dopamine solution (PDA), and soaking in AgNO with certain concentration3Stirring the solution for 3 hours at room temperature, washing with water, and drying to obtain the textile fabric/Ag composite material. A certain molar amount of Bi (NO)3)3·5 H2Dissolving O in glycerol; a certain molar weight of NaVO3·2 H2Dissolving O in deionized water; mixing the above solutions and transferring into an autoclave with a polytetrafluoroethylene lining, and keeping at 180 ℃ for 8 h; centrifuging, washing with water, washing with alcohol, and drying at 60 deg.C for 4 h to obtain BiVO4And (3) powder. At Ar/H2Annealing for 10 h at 350 ℃ in the atmosphere, and reducing the alloy into BiVO in situ4A Bi powder. Placing the textile cloth/Ag in the BiVO4Depositing in Bi water solution for a certain time to obtain the biomaterial-loaded bimetal Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
The method comprises the following steps:
dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 8.5 by using a 1 mol/L NaOH solution to obtain a solution A;
step two:
cleaning a certain size of textile cloth with acetone and ethanol; placing the mixture in the solution A for 24 hours at room temperature to obtain a product A;
step three:
0.1 g of AgNO3Dissolving in 100ml water to obtain solution B;
step four:
placing the product A in the solution B, stirring for 3h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
step five:
0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerin to obtain a precursor solutionC; adding 0.4 mmol of NaVO3·2H2Dissolving O in 16 ml of deionized water to obtain a precursor solution D;
step six:
adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
step seven:
centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
step eight:
product D in Ar/H2Annealing for 10 hours at the temperature of 350 ℃ in the atmosphere to obtain a product F;
step nine:
dissolving 0.1 g of product F in 100ml of water to obtain a solution E;
step ten:
soaking the product B in the solution E, stirring for 1h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetallic Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
And in the first step, the PH value is adjusted to be 7.0-9.0.
And the dipping time in the second step is 6-48 h.
AgNO in the third step3The mass range is 0.05-0.4 g.
The stirring time in the fourth step is 1-12 h.
The annealing temperature range in the step eight is 300-400 ℃.
The annealing time range in the step eight is 5-12 h.
Ar/H in the step eight2The proportion range is 95%: 5% -70%: 30 percent.
The mass range of the product F in the ninth step is 0.05-0.4 g.
The stirring time in the step ten is 1-12 h.
Biomaterial-loaded bimetal Ag/BiVO4Flexible easy-to-recycle photocatalysis of/BiThe material is applied to photocatalysis technology, such as pollutant degradation, photolysis water and the like. A300W Xe lamp was used as a light source, and a cut-off filter with a wavelength of less than 800 nm was used to simulate sunlight. 50 ml of rhodamine B (Rh B) solution is measured and added with the catalyst. Before illumination, the catalyst and the pollutants are adsorbed and stirred for 30 min in the dark to reach adsorption equilibrium. After turning on the lamp, taking 4 mL samples from the reaction vessel every 20 min, measuring the absorbance of Rh B by using an ultraviolet-visible spectrophotometer, and judging the degradation efficiency of the catalyst on the pollutant solution according to the absorbance.
The invention has the beneficial effects that:
the invention adopts a biological template dipping method, utilizes the strong reducibility of the biological template PDA to obtain Ag, and obtains Ag in H2In-situ reduction under atmosphere to obtain BiVO4Bi, preparing the Bi-metal Ag/BiVO loaded on the biomaterial4the/Bi flexible easily-recycled photocatalytic material shows flexibility and bendability, does not need to worry about material damage even if being folded for a long time or repeatedly bent, can be randomly cut according to actual needs without influencing material performance, and effectively solves the problem that the existing powder photocatalyst is difficult to separate and recycle; has the advantages of high charge separation rate, wide light absorption range, high photocatalytic activity, high degradation rate, strong hydrolysis capacity and convenient preparation.
The noble metal nanoparticles can effectively transfer electrons and inhibit the recombination of photogenerated electrons and holes, and meanwhile, the Surface Plasmon Resonance (SPR) effect of the noble metal nanoparticles is beneficial to absorbing visible light, so that the photocatalysis effect is obviously improved. The semi-metal material Bi has the SPR effect of the noble metal, small band gap energy, low mass and high carrier movement, becomes an ideal substitute of the noble metal, reduces the cost and provides convenience for realizing large-scale production. In addition, Bi and BiVO generated by in-situ reduction are utilized4The synergistic effect of the two components promotes the charge separation efficiency and enhances the light absorption range.
Due to the rapid development of a new biological template method, the polydopamine material (PDA) has strong adhesive force and reducibility, and can reduce metal precursor salt into corresponding metal elements at room temperature. Therefore, it can directly reduce Ag at room temperature by using PDA as template+Thereby uniformly preparing Ag nanoparticlesParticle and simple and environment-friendly preparation process.
In addition, the problem of recycling and reusing the photocatalyst must be solved in practical use, and thus the photocatalyst should be fixed on some substrates such as fabrics, fibers, plastics, and the like. The textile cloth is cheap and easy to obtain, has excellent physical and mechanical properties, has rich porous structures, can promote the absorption of dye molecules, is convenient for the recycling of the photocatalyst, and solves the problem that the powdery catalyst is difficult to recycle.
Drawings
FIG. 1 shows BiVO obtained4And Bi/BiVO4Optical pictures and SEM images of (a);
FIG. 2 shows BiVO obtained4And Bi/BiVO4XRD pattern of (a);
FIG. 3 is the biomaterial load bimetal Ag/BiVO4A preparation flow chart and a sample schematic diagram of the/Bi flexible easily-recycled photocatalytic material.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1
(1) Dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 8.5 by using a 1 mol/L NaOH solution to obtain a solution A;
(2) cleaning a cotton fabric with a certain size by using acetone and ethanol; placing the mixture in the solution A for 24 hours at room temperature to obtain a product A;
(3) 0.1 g of AgNO3Dissolving in 100ml water to obtain solution B;
(4) placing the product A in the solution B, stirring for 3h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
(5) 0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerol to obtain a precursor solution C; adding 0.4 mmol NaVO3·2 H2Dissolving O in 16 ml of deionized water to obtain a precursor solution D;
(6) adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
(7) centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
(8) product D in Ar/H2Annealing for 10 hours at 350 ℃ in the atmosphere to obtain a product F;
(9) dissolving 0.1 g of product F in 100ml of water to obtain a solution E;
(10) dipping the product B in the solution E, stirring for 1h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetallic Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
The obtained biological material carries bimetal Ag/BiVO4The method for testing the photocatalytic performance of the/Bi flexible easily-recycled photocatalytic material comprises the following steps:
A300W Xe lamp was used as a light source, and a cut-off filter with a wavelength of less than 800 nm was used to simulate sunlight. 50 ml of rhodamine B (Rh B) solution is measured and added with the catalyst. Before illumination, the catalyst and the pollutants are adsorbed and stirred for 30 min in the dark to reach adsorption equilibrium. After turning on the lamp, taking 4 mL samples from the reaction vessel every 20 min, measuring the absorbance of Rh B by using an ultraviolet-visible spectrophotometer, and judging the degradation efficiency of the catalyst on the pollutant solution according to the absorbance.
Example 2
(1) Dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 7 by using a 1 mol/L NaOH solution to obtain a solution A;
(2) cleaning a cotton fabric with a certain size by using acetone and ethanol; placing the mixture in the solution A for 24 hours at room temperature to obtain a product A;
(3) 0.1 g of AgNO3Dissolving in 100ml water to obtain solution B;
(4) placing the product A in the solution B, stirring for 3h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
(5) 0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerol to obtain a precursor solution C; adding 0.4 mmol NaVO3·2 H2Dissolving O in 16 ml of deionized water to obtain a precursor solution D;
(6) adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
(7) centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
(8) product D in Ar/H2Annealing for 10 hours at 300 ℃ in the atmosphere to obtain a product F;
(9) dissolving 0.1 g of product F in 100ml of water to obtain a solution E;
(10) dipping the product B in the solution E, stirring for 1h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetallic Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
The obtained biological material carries bimetal Ag/BiVO4The method for testing the photocatalytic performance of the/Bi flexible easily-recycled photocatalytic material comprises the following steps:
A300W Xe lamp was used as a light source, and a cut-off filter with a wavelength of less than 800 nm was used to simulate sunlight. 50 ml of rhodamine B (Rh B) solution is measured and added with the catalyst. Before illumination, the catalyst and the pollutants are adsorbed and stirred for 30 min in the dark to reach adsorption equilibrium. After turning on the lamp, taking 4 mL samples from the reaction vessel every 20 min, measuring the absorbance of Rh B by using an ultraviolet-visible spectrophotometer, and judging the degradation efficiency of the catalyst on the pollutant solution according to the absorbance.
Example 3
(1) Dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 9 by using a 1 mol/L NaOH solution to obtain a solution A;
(2) cleaning a cotton fabric with a certain size by using acetone and ethanol; placing the mixture in the solution A for 24 hours at room temperature to obtain a product A;
(3) 0.1 g of AgNO3Dissolving in 100ml water to obtain solution B;
(4) placing the product A in the solution B, stirring for 3h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
(5) 0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerol to obtain a precursor solution C; adding 0.4 mmol NaVO3·2 H2Dissolving O in 16 ml of deionized water to obtain a precursor solution D;
(6) adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
(7) centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
(8) product D in Ar/H2Annealing at 400 ℃ for 10 h in the atmosphere to obtain a product F;
(9) dissolving 0.1 g of product F in 100ml of water to obtain a solution E;
(10) dipping the product B in the solution E, stirring for 1h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetallic Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
The obtained biological material carries bimetal Ag/BiVO4The method for testing the photocatalytic performance of the/Bi flexible easily-recycled photocatalytic material comprises the following steps:
A300W Xe lamp was used as a light source, and a cut-off filter with a wavelength of less than 800 nm was used to simulate sunlight. 50 ml of rhodamine B (Rh B) solution is measured and added with the catalyst. Before illumination, the catalyst and the pollutants are adsorbed and stirred for 30 min in the dark to reach adsorption equilibrium. After turning on the lamp, taking 4 mL samples from the reaction vessel every 20 min, measuring the absorbance of Rh B by using an ultraviolet-visible spectrophotometer, and judging the degradation efficiency of the catalyst on the pollutant solution according to the absorbance.
Example 4
(1) Dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 8.5 by using a 1 mol/L NaOH solution to obtain a solution A;
(2) cleaning a cotton fabric with a certain size by using acetone and ethanol; placing the mixture in the solution A for 6 hours at room temperature to obtain a product A;
(3) 0.1 g of AgNO3Dissolving in 100ml water to obtain solution B;
(4) placing the product A in the solution B, stirring for 3h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
(5) 0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerol to obtain a precursor solution C; adding 0.4 mmol NaVO3·2 H2Dissolving O in 16 ml of deionized water to obtain a precursor solution D;
(6) adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
(7) centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
(8) product D in Ar/H2Annealing for 5 hours at 350 ℃ in the atmosphere to obtain a product F;
(9) dissolving 0.1 g of product F in 100ml of water to obtain a solution E;
(10) dipping the product B in the solution E, stirring for 1h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetallic Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
The obtained biological material carries bimetal Ag/BiVO4The method for testing the photocatalytic performance of the/Bi flexible easily-recycled photocatalytic material comprises the following steps:
A300W Xe lamp was used as a light source, and a cut-off filter with a wavelength of less than 800 nm was used to simulate sunlight. 50 ml of rhodamine B (Rh B) solution is measured and added with the catalyst. Before illumination, the catalyst and the pollutants are adsorbed and stirred for 30 min in the dark to reach adsorption equilibrium. After turning on the lamp, taking 4 mL samples from the reaction vessel every 20 min, measuring the absorbance of Rh B by using an ultraviolet-visible spectrophotometer, and judging the degradation efficiency of the catalyst on the pollutant solution according to the absorbance.
Example 5
(1) Dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 8.5 by using a 1 mol/L NaOH solution to obtain a solution A;
(2) cleaning a cotton fabric with a certain size by using acetone and ethanol; placing the mixture in the solution A for 48 hours at room temperature to obtain a product A;
(3) 0.1 g of AgNO3Dissolving in 100ml water to obtain solution B;
(4) placing the product A in the solution B, stirring for 3h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
(5) 0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerol to obtain a precursor solution C; adding 0.4 mmol NaVO3·2 H2Dissolving O in 16 ml of deionized water to obtain a precursor solution D;
(6) adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
(7) centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
(8) product D in Ar/H2Annealing at 350 ℃ for 8 h in the atmosphere to obtain a product F;
(9) dissolving 0.1 g of product F in 100ml of water to obtain a solution E;
(10) dipping the product B in the solution E, stirring for 1h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetallic Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
The obtained biological material carries bimetal Ag/BiVO4The method for testing the photocatalytic performance of the/Bi flexible easily-recycled photocatalytic material comprises the following steps:
A300W Xe lamp was used as a light source, and a cut-off filter with a wavelength of less than 800 nm was used to simulate sunlight. 50 ml of rhodamine B (Rh B) solution is measured and added with the catalyst. Before illumination, the catalyst and the pollutants are adsorbed and stirred for 30 min in the dark to reach adsorption equilibrium. After turning on the lamp, taking 4 mL samples from the reaction vessel every 20 min, measuring the absorbance of Rh B by using an ultraviolet-visible spectrophotometer, and judging the degradation efficiency of the catalyst on the pollutant solution according to the absorbance.
Example 6
(1) Dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 8.5 by using a 1 mol/L NaOH solution to obtain a solution A;
(2) cleaning a cotton fabric with a certain size by using acetone and ethanol; placing the mixture in the solution A for 24 hours at room temperature to obtain a product A;
(3) 0.05g of AgNO3Dissolving in 100ml water to obtain solution B;
(4) placing the product A in the solution B, stirring for 3h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
(5) 0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerol to obtain a precursor solution C; adding 0.4 mmol NaVO3·2 H2Dissolving O in 16 ml of deionized water to obtain a precursor solution D;
(6) adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
(7) centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
(8) product D in Ar/H2Annealing for 12 hours at 350 ℃ in the atmosphere to obtain a product F;
(9) dissolving 0.1 g of product F in 100ml of water to obtain a solution E;
(10) dipping the product B in the solution E, stirring for 1h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetallic Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
The obtained biological material carries bimetal Ag/BiVO4The method for testing the photocatalytic performance of the/Bi flexible easily-recycled photocatalytic material comprises the following steps:
A300W Xe lamp was used as a light source, and a cut-off filter with a wavelength of less than 800 nm was used to simulate sunlight. 50 ml of rhodamine B (Rh B) solution is measured and added with the catalyst. Before illumination, the catalyst and the pollutants are adsorbed and stirred for 30 min in the dark to reach adsorption equilibrium. After turning on the lamp, taking 4 mL samples from the reaction vessel every 20 min, measuring the absorbance of Rh B by using an ultraviolet-visible spectrophotometer, and judging the degradation efficiency of the catalyst on the pollutant solution according to the absorbance.
Example 7
(1) Dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 8.5 by using a 1 mol/L NaOH solution to obtain a solution A;
(2) cleaning a cotton fabric with a certain size by using acetone and ethanol; placing the mixture in the solution A for 24 hours at room temperature to obtain a product A;
(3) 0.4g of AgNO3Dissolving in 100ml water to obtain solution B;
(4) placing the product A in the solution B, stirring for 3h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
(5) 0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerol to obtain a precursor solution C; adding 0.4 mmol NaVO3·2 H2Dissolving O in 16 ml of deionized water to obtain a precursor solution D;
(6) adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
(7) centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
(8) product D in Ar/H2Annealing for 10 hours at 350 ℃ in the atmosphere to obtain a product F;
(9) dissolving 0.1 g of product F in 100ml of water to obtain a solution E;
(10) dipping the product B in the solution E, stirring for 1h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetallic Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
The obtained biological material carries bimetal Ag/BiVO4The method for testing the photocatalytic performance of the/Bi flexible easily-recycled photocatalytic material comprises the following steps:
A300W Xe lamp was used as a light source, and a cut-off filter with a wavelength of less than 800 nm was used to simulate sunlight. 50 ml of rhodamine B (Rh B) solution is measured and added with the catalyst. Before illumination, the catalyst and the pollutants are adsorbed and stirred for 30 min in the dark to reach adsorption equilibrium. After turning on the lamp, taking 4 mL samples from the reaction vessel every 20 min, measuring the absorbance of Rh B by using an ultraviolet-visible spectrophotometer, and judging the degradation efficiency of the catalyst on the pollutant solution according to the absorbance.
Example 8
(1) Dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 8.5 by using a 1 mol/L NaOH solution to obtain a solution A;
(2) cleaning a cotton fabric with a certain size by using acetone and ethanol; placing the mixture in the solution A for 24 hours at room temperature to obtain a product A;
(3) 0.1 g of AgNO3Dissolving in 100ml water to obtain solution B;
(4) placing the product A in the solution B, stirring for 1h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
(5) 0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerol to obtain a precursor solution C; adding 0.4 mmol NaVO3·2 H2Dissolving O in 16 ml of deionized water to obtain a precursor solution D;
(6) adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
(7) centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
(8) product D in Ar/H2Annealing for 10 hours at 350 ℃ in the atmosphere to obtain a product F;
(9) dissolving 0.1 g of product F in 100ml of water to obtain a solution E;
(10) dipping the product B in the solution E, stirring for 1h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetallic Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
The obtained biological material carries bimetal Ag/BiVO4Photocatalytic performance of/Bi flexible easily-recycled photocatalytic materialThe test method is as follows:
A300W Xe lamp was used as a light source, and a cut-off filter with a wavelength of less than 800 nm was used to simulate sunlight. 50 ml of rhodamine B (Rh B) solution is measured and added with the catalyst. Before illumination, the catalyst and the pollutants are adsorbed and stirred for 30 min in the dark to reach adsorption equilibrium. After turning on the lamp, taking 4 mL samples from the reaction vessel every 20 min, measuring the absorbance of Rh B by using an ultraviolet-visible spectrophotometer, and judging the degradation efficiency of the catalyst on the pollutant solution according to the absorbance.
Example 9
(1) Dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 8.5 by using a 1 mol/L NaOH solution to obtain a solution A;
(2) cleaning a cotton fabric with a certain size by using acetone and ethanol; placing the mixture in the solution A for 24 hours at room temperature to obtain a product A;
(3) 0.1 g of AgNO3Dissolving in 100ml water to obtain solution B;
(4) placing the product A in the solution B, stirring for 12h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
(5) 0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerol to obtain a precursor solution C; adding 0.4 mmol NaVO3·2 H2Dissolving O in 16 ml of deionized water to obtain a precursor solution D;
(6) adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
(7) centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
(8) product D in Ar/H2Annealing for 10 hours at 350 ℃ in the atmosphere to obtain a product F;
(9) dissolving 0.1 g of product F in 100ml of water to obtain a solution E;
(10) soaking the product B in the solution E, stirring for 1h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetal Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
The obtained biological material carries bimetal Ag/BiVO4The method for testing the photocatalytic performance of the/Bi flexible easily-recycled photocatalytic material comprises the following steps:
A300W Xe lamp was used as a light source, and a cut-off filter with a wavelength of less than 800 nm was used to simulate sunlight. 50 ml of rhodamine B (Rh B) solution is measured and added with the catalyst. Before illumination, the catalyst and the pollutants are adsorbed and stirred for 30 min in the dark to reach adsorption equilibrium. After turning on the lamp, taking 4 mL samples from the reaction vessel every 20 min, measuring the absorbance of Rh B by using an ultraviolet-visible spectrophotometer, and judging the degradation efficiency of the catalyst on the pollutant solution according to the absorbance.
Example 10
(1) Dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 8.5 by using a 1 mol/L NaOH solution to obtain a solution A;
(2) cleaning a cotton fabric with a certain size by using acetone and ethanol; placing the mixture in the solution A for 24 hours at room temperature to obtain a product A;
(3) 0.1 g of AgNO3Dissolving in 100ml water to obtain solution B;
(4) placing the product A in the solution B, stirring for 3h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
(5) 0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerol to obtain a precursor solution C; adding 0.4 mmol NaVO3·2 H2Dissolving O in 16 ml of deionized water to obtain a precursor solution D;
(6) adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
(7) centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
(8) product D in Ar/H2Annealing for 10 hours at 350 ℃ in the atmosphere to obtain a product F;
(9) 0.05g of product F was dissolved in 100ml of water to give a solution E;
(10) dipping the product B in the solution E, stirring for 1h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetallic Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
The obtained biological material carries bimetal Ag/BiVO4The method for testing the photocatalytic performance of the/Bi flexible easily-recycled photocatalytic material comprises the following steps:
A300W Xe lamp was used as a light source, and a cut-off filter with a wavelength of less than 800 nm was used to simulate sunlight. 50 ml of rhodamine B (Rh B) solution is measured and added with the catalyst. Before illumination, the catalyst and the pollutants are adsorbed and stirred for 30 min in the dark to reach adsorption equilibrium. After turning on the lamp, taking 4 mL samples from the reaction vessel every 20 min, measuring the absorbance of Rh B by using an ultraviolet-visible spectrophotometer, and judging the degradation efficiency of the catalyst on the pollutant solution according to the absorbance.
Example 11
(1) Dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 8.5 by using a 1 mol/L NaOH solution to obtain a solution A;
(2) cleaning a cotton fabric with a certain size by using acetone and ethanol; placing the mixture in the solution A for 24 hours at room temperature to obtain a product A;
(3) 0.1 g of AgNO3Dissolving in 100ml water to obtain solution B;
(4) placing the product A in the solution B, stirring for 3h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
(5) 0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerol to obtain a precursor solution C; adding 0.4 mmol NaVO3·2 H2Dissolving O in 16 ml of deionized water to obtain a precursor solution D;
(6) adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
(7) centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
(8) product D in Ar/H2Annealing for 10 hours at 350 ℃ in the atmosphere to obtain a product F;
(9) dissolving 0.4g of the product F in 100ml of water to obtain a solution E;
(10) dipping the product B in the solution E, stirring for 1h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetallic Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
The obtained biological material carries bimetal Ag/BiVO4The method for testing the photocatalytic performance of the/Bi flexible easily-recycled photocatalytic material comprises the following steps:
A300W Xe lamp was used as a light source, and a cut-off filter with a wavelength of less than 800 nm was used to simulate sunlight. 50 ml of rhodamine B (Rh B) solution is measured and added with the catalyst. Before illumination, the catalyst and the pollutants are adsorbed and stirred for 30 min in the dark to reach adsorption equilibrium. After turning on the lamp, taking 4 mL samples from the reaction vessel every 20 min, measuring the absorbance of Rh B by using an ultraviolet-visible spectrophotometer, and judging the degradation efficiency of the catalyst on the pollutant solution according to the absorbance.
Example 12
(1) Dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 8.5 by using a 1 mol/L NaOH solution to obtain a solution A;
(2) cleaning a cotton fabric with a certain size by using acetone and ethanol; placing the mixture in the solution A for 24 hours at room temperature to obtain a product A;
(3) 0.1 g of AgNO3Dissolving in 100ml water to obtain solution B;
(4) placing the product A in the solution B, stirring for 3h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
(5) 0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerol to obtain a precursor solution C; adding 0.4 mmol NaVO3·2 H2Dissolving O in 16 ml of deionized water to obtain a precursor solution D;
(6) adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
(7) centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
(8) product D in Ar/H2Annealing for 10 hours at 350 ℃ in the atmosphere to obtain a product F;
(9) dissolving 0.1 g of product F in 100ml of water to obtain a solution E;
(10) dipping the product B in the solution E, stirring for 12h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetallic Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
The obtained biological material carries bimetal Ag/BiVO4The method for testing the photocatalytic performance of the/Bi flexible easily-recycled photocatalytic material comprises the following steps:
A300W Xe lamp was used as a light source, and a cut-off filter with a wavelength of less than 800 nm was used to simulate sunlight. 50 ml of rhodamine B (Rh B) solution is measured and added with the catalyst. Before illumination, the catalyst and the pollutants are adsorbed and stirred for 30 min in the dark to reach adsorption equilibrium. After turning on the lamp, taking 4 mL samples from the reaction vessel every 20 min, measuring the absorbance of Rh B by using an ultraviolet-visible spectrophotometer, and judging the degradation efficiency of the catalyst on the pollutant solution according to the absorbance.
Example 13
(1) Dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 8 by using a 1 mol/L NaOH solution to obtain a solution A;
(2) cleaning a cotton fabric with a certain size by using acetone and ethanol; placing the mixture in the solution A for 12 hours at room temperature to obtain a product A;
(3) 0.2 g of AgNO3Dissolving in 100ml water to obtain solution B;
(4) placing the product A in the solution B, stirring for 6 h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
(5) 0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerol to obtain a precursor solution C; adding 0.4 mmol NaVO3·2 H2Before dissolving O in 16 ml deionized waterA precursor solution D;
(6) adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
(7) centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
(8) product D in Ar/H2Annealing for 10 hours at 350 ℃ in the atmosphere to obtain a product F;
(9) dissolving 0.2 g of the product F in 100ml of water to obtain a solution E;
(10) dipping the product B in the solution E, stirring for 6 h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetallic Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
The obtained biological material carries bimetal Ag/BiVO4The method for testing the photocatalytic performance of the/Bi flexible easily-recycled photocatalytic material comprises the following steps:
A300W Xe lamp was used as a light source, and a cut-off filter with a wavelength of less than 800 nm was used to simulate sunlight. 50 ml of rhodamine B (Rh B) solution is measured and added with the catalyst. Before illumination, the catalyst and the pollutants are adsorbed and stirred for 30 min in the dark to reach adsorption equilibrium. After turning on the lamp, taking 4 mL samples from the reaction vessel every 20 min, measuring the absorbance of Rh B by using an ultraviolet-visible spectrophotometer, and judging the degradation efficiency of the catalyst on the pollutant solution according to the absorbance.
Example 14
(1) Dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 7.5 by using a 1 mol/L NaOH solution to obtain a solution A;
(2) cleaning a cotton fabric with a certain size by using acetone and ethanol; placing the mixture in the solution A for 24 hours at room temperature to obtain a product A;
(3) 0.15 g of AgNO3Dissolving in 100ml water to obtain solution B;
(4) placing the product A in the solution B, stirring for 3h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
(5) 0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerol to obtain a precursor solution C; adding 0.4 mmol NaVO3·2 H2Dissolving O in 16 ml of deionized water to obtain a precursor solution D;
(6) adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
(7) centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
(8) product D in Ar/H2Annealing for 10 hours at 350 ℃ in the atmosphere to obtain a product F;
(9) dissolving 0.1 g of product F in 100ml of water to obtain a solution E;
(10) dipping the product B in the solution E, stirring for 1h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetallic Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
The obtained biological material carries bimetal Ag/BiVO4The method for testing the photocatalytic performance of the/Bi flexible easily-recycled photocatalytic material comprises the following steps:
A300W Xe lamp was used as a light source, and a cut-off filter with a wavelength of less than 800 nm was used to simulate sunlight. 50 ml of rhodamine B (Rh B) solution is measured and added with the catalyst. Before illumination, the catalyst and the pollutants are adsorbed and stirred for 30 min in the dark to reach adsorption equilibrium. After turning on the lamp, taking 4 mL samples from the reaction vessel every 20 min, measuring the absorbance of Rh B by using an ultraviolet-visible spectrophotometer, and judging the degradation efficiency of the catalyst on the pollutant solution according to the absorbance.
Example 15
(1) Dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 8.5 by using a 1 mol/L NaOH solution to obtain a solution A;
(2) cleaning a cotton fabric with a certain size by using acetone and ethanol; placing the mixture in the solution A for 24 hours at room temperature to obtain a product A;
(3) 0.1 g of AgNO3Dissolving in 100ml water to obtain solution B;
(4) placing the product A in the solution B, stirring for 3h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
(5) 0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerol to obtain a precursor solution C; adding 0.4 mmol NaVO3·2 H2Dissolving O in 16 ml of deionized water to obtain a precursor solution D;
(6) adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
(7) centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
(8) product D in Ar/H2Annealing for 10 hours at 350 ℃ in the atmosphere to obtain a product F;
(9) dissolving 0.1 g of product F in 100ml of water to obtain a solution E;
(10) dipping the product B in the solution E, stirring for 3h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetallic Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
The obtained biological material carries bimetal Ag/BiVO4The method for testing the photocatalytic performance of the/Bi flexible easily-recycled photocatalytic material comprises the following steps:
A300W Xe lamp was used as a light source, and a cut-off filter with a wavelength of less than 800 nm was used to simulate sunlight. 50 ml of rhodamine B (Rh B) solution is measured and added with the catalyst. Before illumination, the catalyst and the pollutants are adsorbed and stirred for 30 min in the dark to reach adsorption equilibrium. After turning on the lamp, taking 4 mL samples from the reaction vessel every 20 min, measuring the absorbance of Rh B by using an ultraviolet-visible spectrophotometer, and judging the degradation efficiency of the catalyst on the pollutant solution according to the absorbance.
Referring to FIG. 1, FIG. 1 shows BiVO4And the prepared Bi/BiVO4The optical picture and SEM image of (a), i.e. the SEM image of the sample produced in example 5; as can be seen, the BiVO was obtained4Is bright yellow powder with a micro-morphology ofMulberry shape with the diameter of about 500 plus 600nm, and BiVO4Reducing for a certain time in hydrogen atmosphere to generate dark yellow Bi/BiVO4The powder, as can be seen, has a particle size of between 500 and 600nm, and a surface composed of nanoparticles. Comparative BiVO4And Bi/BiVO4The microstructure of (A) is known as pure BiVO4And Bi/BiVO4There was no significant difference between them, indicating that Bi is derived from BiVO4In-situ growth in the material, and Bi generation to BiVO4Has little effect on the morphology of (2).
FIG. 2 shows the Bi/BiVO obtained4From the XRD pattern of the sample prepared in example 15, it is clearly observed that BiVO is present in the sample4And the characteristic peak of Bi, which indicates that BiVO can be successfully generated under the reaction temperature condition described in the present invention4a/Bi composite material.
Referring to FIG. 3, FIG. 3 is a diagram of a biomaterial-loaded bi-metal Ag/BiVO4A preparation flow chart and a sample schematic diagram of the/Bi flexible easily-recycled photocatalytic material, namely the sample prepared in example 1. After the textile cloth is pretreated by PDA, the textile cloth is soaked in AgNO3Soaking in the solution for a certain time to obtain Ag/textile cloth, and preparing BiVO4Depositing in a/Bi solution for a certain time to obtain Ag/BiVO4/Bi/textile fabric. By bending and folding the sample at an arbitrary angle, the sample is not damaged, and excellent flexibility and bendability are exhibited.
The above examples show that the method for preparing the biomaterial-loaded bimetallic Ag/BiVO provided by the invention4The preparation method of the/Bi flexible easily-recycled photocatalytic material has simple steps, and the prepared biomaterial loads bimetal Ag/BiVO4The flexible easily-recycled photocatalytic material has the advantages of large photoresponse range and high carrier separation rate, has the advantages of high catalytic activity, high degradation rate and strong hydrolysis capacity as a photocatalytic material, and provides a new idea for efficient utilization of solar energy.
The technology of loading bimetal by using biological material as substrate is used for solving the problem of BiVO4Provides opportunities for band gap problems and carrier recombination problems, coarse porous BiVO4Help to adsorb more electrons for oxygenThe reduction reaction utilizes the SPR effect of the noble metal of Bi to effectively separate charges, replaces the use of the noble metal, reduces the cost and provides convenience for realizing large-scale production. In addition, Bi and BiVO generated by in-situ reduction are utilized4And Ag, promoting charge separation efficiency and enhancing light absorption range. The biological material is used as a substrate, the abundant porous structure can promote the absorption of dye molecules, the price is low, the material is easy to obtain, the preparation method is simple, the material can be cut at will according to the actual use condition, the photocatalyst is convenient to recycle, and the current situation that the existing powdery catalyst is difficult to recycle is solved. Preparation of biomaterial-loaded bimetal Ag/BiVO4The flexible easily-recycled photocatalytic material is an effective method and a reliable way for solving the problems that an electron-hole of the photocatalytic material is easy to compound, powder is difficult to recycle and sustainable development is realized.
Claims (10)
1. Biomaterial-loaded bimetal Ag/BiVO4The preparation method of the/Bi flexible easily-recycled photocatalytic material is characterized by comprising the following steps of:
sequentially placing the textile cloth pretreated by polydopamine on AgNO3Dipping in the solution to uniformly prepare Ag nano particles; then the product is put in BiVO4Dipping in/Bi dispersion to obtain a biomaterial-loaded bimetal Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
2. The method as claimed in claim 1, wherein the polydopamine-pretreated textile fabric is obtained by immersing the textile fabric in a polydopamine pretreatment solution with a pH of 7-9.
3. The method as claimed in claim 2, wherein the textile cloth is immersed in the polydopamine pretreatment solution for 6-48 h.
4. The method of claim 1, comprising the steps of: soaking textile cloth pretreated by polydopamine in the solution containing 0.05 to 0.4g of AgNO3Stirring the solution for 1 to 12 hours to obtain Ag/textileAnd (3) cloth.
5. The method of claim 4, comprising the steps of: soaking Ag/cotton fabric in a solution containing 0.05-0.4 g of BiVO4Stirring the aqueous dispersion of/Bi for 1 to 12 hours to obtain Ag/BiVO4/Bi/textile fabric.
6. The method of claim 1, wherein BiVO is BiVO4Obtained by a process comprising the steps of: will be dispersed with Bi (NO)3)3And NaVO3The system is subjected to solvothermal reaction at 120-200 ℃ for 6-12 h to obtain BiVO4。
7. The method of claim 1, wherein BiVO is BiVO4the/Bi powder is obtained by a process comprising the following steps: BiVO (bismuth oxide) is added4At Ar/H2Annealing for 5 to 12 hours at the temperature of between 300 and 400 ℃ in the atmosphere to obtain BiVO4/Bi。
8. The method of claim 1, comprising the steps of:
1) dissolving 0.2 g of dopamine in 100mL of water, and adjusting the pH value to 7.0-9.0 by using 1 mol/L NaOH solution to obtain a solution A;
2) cleaning a certain size of textile cloth with acetone and ethanol; placing the mixture in the solution A for 6-48 hours at room temperature to obtain a product A;
3) 0.05-0.4 g of AgNO3Dissolving in 100ml water to obtain solution B;
4) placing the product A in the solution B, stirring for 1-12 h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain a product B;
5) 0.4 mmol of Bi (NO)3)3·5 H2Dissolving O in 16 ml of glycerol to obtain a precursor solution C; adding 0.4 mmol of NaVO3·2 H2Dissolving O in 16 ml of deionized water to obtain a precursor solution D;
6) adding the solution C into the solution D and stirring vigorously to obtain a solution E; transferring the solution E into a high-pressure autoclave with a polytetrafluoroethylene lining, and keeping the temperature at 180 ℃ for 8 hours to obtain a synthetic product C;
7) centrifuging and separating the solvent thermal synthesis product C at 10000 rpm, washing with deionized water and ethanol, and drying at 60 ℃ for 4 hours to obtain a product D;
8) product D in Ar/H2Annealing at 300-400 ℃ for 5 h-12 in the atmosphere to obtain a product F; Ar/H2The proportion ranges from (95-70)% to (5-30)%;
9) dissolving 0.05-0.4 g of the product F in 100ml of water to obtain a solution E;
10) dipping the product B in the solution E, stirring for 1-12 h, washing with deionized water and ethanol, and drying at 60 ℃ for 3h to obtain the biomaterial-loaded bimetal Ag/BiVO4the/Bi is flexible and easy to recycle the photocatalytic material.
9. A biomaterial-loaded bimetallic Ag/BiVO obtainable by the process of any one of claims 1 to 84the/Bi is flexible and easy to recycle the photocatalytic material.
10. Use of the material of claim 9 for photocatalytic degradation of pollutants or photolysis of water to produce oxygen.
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