CN114950498A - Recyclable efficient photocatalytic material and preparation method and application thereof - Google Patents
Recyclable efficient photocatalytic material and preparation method and application thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 81
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 62
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000011941 photocatalyst Substances 0.000 claims abstract description 7
- 229910021607 Silver chloride Inorganic materials 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000006731 degradation reaction Methods 0.000 claims description 16
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 claims description 16
- 229940043267 rhodamine b Drugs 0.000 claims description 16
- 230000015556 catabolic process Effects 0.000 claims description 15
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 claims description 15
- 229940012189 methyl orange Drugs 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 15
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims description 14
- 235000010413 sodium alginate Nutrition 0.000 claims description 11
- 239000000661 sodium alginate Substances 0.000 claims description 11
- 229940005550 sodium alginate Drugs 0.000 claims description 11
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical group CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 10
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
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- 238000003756 stirring Methods 0.000 claims description 10
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- 150000003522 tetracyclines Chemical class 0.000 claims description 8
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- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 8
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- 238000001914 filtration Methods 0.000 claims description 7
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 6
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- 150000004676 glycans Chemical class 0.000 claims description 4
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- 235000010408 potassium alginate Nutrition 0.000 claims description 4
- 239000000737 potassium alginate Substances 0.000 claims description 4
- MZYRDLHIWXQJCQ-YZOKENDUSA-L potassium alginate Chemical compound [K+].[K+].O1[C@@H](C([O-])=O)[C@@H](OC)[C@H](O)[C@H](O)[C@@H]1O[C@@H]1[C@@H](C([O-])=O)O[C@@H](O)[C@@H](O)[C@H]1O MZYRDLHIWXQJCQ-YZOKENDUSA-L 0.000 claims description 4
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- 238000003760 magnetic stirring Methods 0.000 description 13
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- 239000008367 deionised water Substances 0.000 description 9
- 229910021641 deionized water Inorganic materials 0.000 description 9
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- -1 alginate ions Chemical class 0.000 description 5
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- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
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- 235000010443 alginic acid Nutrition 0.000 description 4
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- 238000002371 ultraviolet--visible spectrum Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical group C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
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- 238000001069 Raman spectroscopy Methods 0.000 description 2
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- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 2
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- 125000003118 aryl group Chemical group 0.000 description 2
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- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
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- 230000035484 reaction time Effects 0.000 description 2
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- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
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- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
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- 230000002776 aggregation Effects 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 125000002490 anilino group Chemical group [H]N(*)C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 125000000524 functional group Chemical group 0.000 description 1
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
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- 239000001301 oxygen Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
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- 229910001961 silver nitrate Inorganic materials 0.000 description 1
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/06—Halogens; Compounds thereof
- B01J27/08—Halides
- B01J27/10—Chlorides
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/03—Precipitation; Co-precipitation
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Abstract
The invention discloses a recyclable high-efficiency photocatalytic material, and a preparation method and application thereof. The photocatalytic material has great application potential in the actual production of photocatalysts.
Description
Technical Field
The invention relates to a photocatalytic material and a preparation method and application thereof, in particular to a recyclable high-efficiency photocatalytic material and a preparation method and application thereof.
Background
In recent years, a plasma photocatalyst such as Ag @ AgCl has attracted much attention. Ag @ AgCl refers to the simple substance state Ag decomposed from AgCl under the illumination condition 0 The Ag @ AgCl photocatalyst is a novel visible light catalytic material based on a nano metal surface plasma effect and a semiconductor photocatalytic effect. Although Ag @ AgCl plasma has good photocatalytic activity, due to the poor photochemical stability of AgCl, the AgCl is easy to agglomerate, and the photoproduction electron-hole recombination rate is high. Therefore, its application in photocatalytic research is limited.
Graphene Oxide (GO) is a novel carbon-based material, is a single-layer graphene sheet consisting of oxygen-containing functional groups such as carboxyl, hydroxyl and epoxy groups, has a wrinkled surface, is a graphene derivative, has the characteristics of excellent hydrophilicity, large specific surface area, low toxicity and the like, and is greatly concerned in the fields of photocatalysis and the like by a composite material formed by GO and a photocatalyst, such as GO and TiO 2 、Ag 3 PO 4 、BiOI、BiVO 4 、ZnO。
Patent CN201410492455.X in 2018 discloses a method for preparing an Ag @ AgCl/GO self-cleaning type surface Raman enhancement substrate. The AgCl sol is subjected to heat preservation for 12-36h at the temperature of 160-180 ℃ in an autoclave to obtain Ag @ AgCl sol, and then the Ag @ AgCl/GO composite film is obtained by self-assembling and adsorbing Ag @ AgCl nanoparticles with positive charges by utilizing the characteristic that GO has negative charges and the strong adsorption function and template effect and is applied to a self-cleaning Raman enhancement substrate. The patent CN111905774A in 2020 discloses a preparation method of a photocatalyst applied to degradation of methyl orange, and a certain amount of TiO is added 2 Obtaining C-TiO at high temperature in a tube furnace 2 Then appropriate amount of silver nitrate, ammonia water and C-TiO are added 2 Adding GO and the catalyst Ag/AgCl/C into a container, sequentially adding an acidic solution and an alcohol solution, and obtaining the catalyst Ag/AgCl/C through visible light illumination-TiO 2 /GO。
At present, some prepared GO supported Ag @ AgCl composite photocatalytic materials have complex preparation processes, some prepared Ag @ AgCl composite photocatalytic materials need high-temperature calcination, and some prepared powder catalytic materials are difficult to separate from water, difficult to recover and recycle and easy to cause secondary pollution.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a recyclable high-efficiency photocatalytic material, a preparation method and application thereof, and effectively solves the problem that a powder catalyst is difficult to separate and recycle. The invention also aims to provide a preparation method of the recyclable high-efficiency photocatalytic material. The invention also aims to provide application of the recyclable high-efficiency photocatalytic material in preparation of a water body cleaning agent.
The technical scheme is as follows: the recyclable high-efficiency photocatalytic material is an Ag @ AgCl/GO photocatalytic material prepared by introducing a graphene oxide material, utilizing the property that an anionic natural high-molecular polysaccharide aqueous solution and divalent cations form stable gel, adopting a chemical coupling and in-situ deposition method to load AgCl and adopting a photo-reduction method.
The high-efficiency photocatalytic material capable of being recycled is characterized in that the anionic natural polymer polysaccharide is sodium alginate or potassium alginate.
The recyclable high-efficiency photocatalytic material is characterized in that the divalent cations are selected from Ca 2+ 、Cu 2+ Or Zn 2+ Preferably Ca 2+ 。
The preparation method of the recyclable high-efficiency photocatalytic material comprises the following steps:
(1) taking graphene oxide dispersion liquid, adding sodium alginate or potassium alginate solution, and performing ultrasonic dispersion to fully mix;
(2) adding cetyl trimethyl ammonium bromide into the mixed solution obtained in the step (2), and performing ultrasonic dispersion; due to the action of hydrogen bonds and the surfactant action of CTAB, alginate ions will be adsorbed on GO.
(3) Slowly adding AgNO dropwise under stirring 3 After the solution is added dropwise, continuously stirring; silver ion (Ag) charged positively due to electrostatic attraction + ) Can attract the negatively charged alginate ions and the carboxylate radical (-COO-) on GO so as to lead Ag to be + Tightly enclosed inside the GO.
(4) Slowly dripping CaCl into the mixed suspension obtained in the step (3) under stirring 2 Forming insoluble small particles by the solution, stirring and standing; using Ca 2+ Cross-linking and AgCl precipitation form insoluble small particles.
(5) And (3) filtering the product obtained in the step (4) by using gauze, washing the obtained small-particle precipitate by using water, adding the small-particle precipitate into a container, adding water, stirring, placing in the sun for irradiation or placing under a xenon lamp light source for irradiation, filtering by using the gauze, washing by using the water, and performing vacuum freeze drying to obtain the Ag @ AgCl/GO photocatalytic material.
According to the preparation method of the recyclable efficient photocatalytic material, the gauze is a double-layer gauze.
The recyclable high-efficiency photocatalytic material is applied to preparation of a water body cleaning agent.
The recyclable high-efficiency photocatalytic material is applied to preparation of a photocatalyst.
The recyclable high-efficiency photocatalytic material is applied to degrading rhodamine B, methylene blue and methyl orange.
The recyclable high-efficiency photocatalytic material is applied to degradation of tetracycline.
The easily-separated and recyclable high-efficiency visible light catalytic material prepared by the invention effectively solves the problem that the powder catalyst is difficult to separate and recycle. Aiming at the problems of poor AgCl light stability and difficult recovery, the invention introduces a Graphene Oxide (GO) material and utilizes an anionic natural high molecular polysaccharide Sodium Alginate (SA) aqueous solution and divalent cations (such as Ca) 2+ ) The method has the characteristics of forming stable gel, adopts chemical coupling and in-situ deposition of loaded AgCl, prepares the Ag @ AgCl/GO insoluble particle photocatalytic material by a photo-reduction method, and is used for treating pollutants such as dye wastewater, antibiotic wastewater and the like. The photocatalytic material is smallGranular, high photocatalytic efficiency, wide visible light wave response range, easy separation from water phase and cyclic utilization.
The invention mainly solves the problems of poor photochemical stability, easy agglomeration, insufficient adsorption capacity and difficult recycling of AgCl. By introducing Graphene Oxide (GO) material and using Sodium Alginate (SA) water solution and divalent cations (such as Ca) 2+ ) The method can form stable gel, adopts chemical coupling and in-situ deposition methods to load AgCl, and prepares the Ag @ AgCl/GO insoluble particle photocatalytic material through a photo-reduction method. The photocatalytic material is in a small particle shape, has the advantages of simple preparation process, strong adsorption capacity of the prepared catalytic material, short photocatalytic degradation time, high catalytic efficiency, easiness in recycling and the like, and can be used for degrading various actual organic polluted wastewater.
Has the advantages that: (1) the preparation process is simple, excessive equipment investment is not needed, and the preparation method can be obtained without complex technical means and process conditions. (2) Response to both ultraviolet and visible light, especially with a broad absorption band under visible light. (3) The material has good catalytic effect on various organic pollutants, and has high catalytic efficiency and short catalytic time, and the first-order reaction kinetics fitting shows that the photocatalytic degradation rate constants (k) of the catalytic material to rhodamine B (RhB), Methylene Blue (MB) and Methyl Orange (MO) are 0.5381min respectively -1 、0.4989min -1 And 0.2573min -1 . (4) The catalytic material is in a small granular shape, is easy to recycle and has good stability, and the composite material still has a decoloring rate of more than 91.0 percent on RhB after 5 times of recycling. The catalytic material has good photocatalytic stability and reusability, and has great potential when being applied to actual production as a visible-light catalyst.
Drawings
FIG. 1 is a high-resolution field emission Scanning Electron Microscope (SEM) image of the morphology of a catalytic material of a catalyst;
FIG. 2 is a Transmission Electron Microscope (TEM) observed morphology of a catalytic material of the catalyst;
FIG. 3 is an EDS diagram of a catalytic material;
FIG. 4 is an infrared spectrum of the catalytic material;
FIG. 5 is a Raman spectrum of the catalytic material;
FIG. 6 is a graph showing the measurement of the specific surface area of the catalytic material;
FIG. 7 is a graph illustrating the pore size distribution of the catalytic material;
FIG. 8 is a UV-Vis spectrum of photocatalytic material for degradation of RhB;
FIG. 9 is a UV-Vis spectrum of photocatalytic material for MB degradation;
FIG. 10 is a UV-Vis spectrum of a photocatalytic material for MO degradation;
FIG. 11 is a graph of the cycle stability test of the degradation of the photocatalytic material RhB;
fig. 12 is a uv-vis spectrum of degradation of tetracycline by the photocatalytic material.
Detailed Description
Example 1
Preparation of Ag @ AgCl/GO
1. 60mL of Graphene Oxide (GO) dispersion liquid with the concentration of 1g/L is taken, 3mL of Sodium Alginate (SA) solution with the concentration of 4g/L is added, and the GO dispersion liquid and the SA solution are fully mixed through ultrasonic dispersion for 15 min.
2. And adding 1.5mL of hexadecyl trimethyl ammonium bromide (CTAB) with the concentration of 10g/L into the mixed solution, ultrasonically dispersing for 30min, and adsorbing the alginate ions on GO due to the action of a hydrogen bond and the surfactant of the CTAB.
3. Under the magnetic stirring, AgNO with the concentration of 50g/L is slowly dripped 3 9mL of the solution was added dropwise, and magnetic stirring was continued for 20 min. Silver ion (Ag) charged positively due to electrostatic attraction + ) Can attract the negatively charged alginate ions and the carboxylate radical (-COO-) on GO so as to lead Ag to be + Tightly enclosed inside the GO.
4. Slowly dropwise adding 9mLCaCl into the mixed suspension under magnetic stirring 2 Solution of Ca by 2+ Cross-linking and AgCl precipitation to further form insoluble small particles, CaCl 2 The solution concentration is 20g/L, and the solution is magnetically stirred for 30min and then is kept stand for 24 h.
5. Filtering with double-layer gauze, washing the obtained small-particle precipitate with deionized water for 5 times, adding the small-particle precipitate into a 250mL triangular flask, adding 50mL deionized water, and under magnetic stirring, placing in the sun for 30min or placing in a 350W xenon lamp light source for 1 h. And filtering with double-layer gauze, washing the obtained particles with deionized water for 3 times, and carrying out vacuum freeze drying to obtain the Ag @ AgCl/GO photocatalytic material.
Example 2
The photocatalytic material obtained in example 1 was observed by a high-resolution field emission Scanning Electron Microscope (SEM) and a Transmission Electron Microscope (TEM), respectively, and the results are shown in fig. 1 and 2. FIG. 3 shows the results of EDS measurement of the photocatalytic material prepared in example 1, as shown in FIG. 3, the results of IR spectrum measurement of the photocatalytic material prepared in example 1 are shown in FIG. 4, and the results of Raman spectrum measurement of the photocatalytic material prepared in example 1 are shown in FIG. 5. The specific surface area of the catalytic material was measured, and the results are shown in FIG. 6. The pore size distribution of the catalytic material was measured and the results are shown in fig. 7.
Example 3
Adding 0.2g of the prepared photocatalytic material into a triangular flask containing 50mL of deionized water, adding rhodamine B (RhB) to enable the concentration of the rhodamine B to be 10mg/L, adjusting the pH value to be 6.5, controlling the temperature to be 40 ℃, adsorbing for 30min under magnetic stirring in a dark place, placing the rhodamine B in a 350W xenon lamp visible light place, irradiating for 10min under magnetic stirring, and enabling the light source to be 2cm away from the liquid level, wherein the adsorption and degradation conditions of the rhodamine B are shown in figure 8. The characteristic absorption of RhB at 554nm of visible light region (electron transition of N → pi on C ═ O, C ═ N) and 270nm of ultraviolet light region (electron transition of pi → pi on benzene ring) is reduced rapidly with the prolonging of reaction time, the maximum absorption peak in visible region is reduced rapidly, which shows that the chromophoric group phenylamino and carbonyl bonds are destroyed gradually, after 10min, the main structural substance of RhB is decomposed completely.
Example 4
Adding 0.2g of the prepared photocatalytic material into a triangular flask containing 50mL of deionized water, adding Methylene Blue (MB) to make the concentration of the material be 10mg/L, adjusting the pH value to be 6.5, controlling the temperature to be 40 ℃, adsorbing the material for 30min under magnetic stirring in a dark place, placing the material in a visible light place of a 350W xenon lamp, irradiating the material for 10min under magnetic stirring, and making the light source be 2cm away from the liquid level, wherein the degradation condition is shown in figure 9. MB has characteristic absorption peaks at 664nm, 609 nm, 291.8nm and 246.4nm, wherein the 664nm and 291.8nm respectively correspond to absorption peaks generated by a super-large conjugated structure of MB and a pi → pi transition of a benzene ring. After 10min, these characteristic absorption peaks disappeared, indicating that MB in the wastewater had been degraded after the reaction.
Example 5
Adding 0.2g of the prepared photocatalytic material into a triangular flask containing 50mL of deionized water, adding Methyl Orange (MO) to make the concentration of the MO to be 10mg/L, adjusting the pH value to be 6.5, controlling the temperature to be 40 ℃, adsorbing the MO for 30min under magnetic stirring in a dark place, placing the MO in a 350W xenon lamp visible light place, irradiating the MO for 12min under magnetic stirring, and making the light source be 2cm away from the liquid level, wherein the degradation condition is shown in figure 10. MO has characteristic absorption peaks at 465.2nm and 271.6nm, which are respectively absorption peaks generated by a conjugated system of an-N ═ N-azo chromogenic group and a benzene ring of the MO. With the prolonging of the catalytic degradation reaction time, 2 absorption peaks are continuously weakened, and after 12min, no obvious absorption peak exists in a visible region and an ultraviolet region, which indicates that MO is catalytically degraded.
Example 6
0.1g of the prepared photocatalytic material is taken and added into a triangular flask containing 50mL of deionized water, RhB is added to ensure that the concentration is 10mg/L, the pH value is adjusted to 6.5, the temperature is controlled at 40 ℃, and the mixture is placed under 350W of xenon lamp visible light for 20min under magnetic stirring. The particles obtained after filtration were washed 2 times with deionized water, and the above operations were repeated, and the degradation effect after 5 cycles of recycling was as shown in fig. 11. After 5 times of recycling, the photocatalytic material still has a degradation rate of more than 90.0% on RhB, which shows that the photocatalytic material has good photocatalytic stability and reusability.
Example 7
Adding 0.2g of the prepared photocatalytic material into 2 triangular flasks containing 50mL of deionized water, respectively, adding tetracycline to make the concentration of the tetracycline 10mg/L, adjusting the pH value to 6.5, controlling the temperature to 40 ℃, adsorbing the material for 30min in a dark place under magnetic stirring, and adding 30% (w/w) hydrogen peroxide (H) into 1 flask 2 O 2 )0.2mL, the other bottle is not added with hydrogen peroxide, andand meanwhile, placing the solution in a visible light place of a 350W xenon lamp, irradiating for 20min under magnetic stirring, wherein the distance between a light source and the liquid level is 2cm, and the adsorption and degradation conditions are shown in figure 12. Irradiating for 20min without adding H 2 O 2 The tetracycline of (A) also showed a weak absorption peak at 267nm, indicating that a small amount of aromatic ring A structure was still present, while a small amount of H was added to the system 2 O 2 The peaks caused by tetracycline at 267nm and 355nm (aromatic rings B-D with the chromophore attached to them) disappeared, indicating complete degradation of tetracycline.
Claims (10)
1. A recyclable high-efficiency photocatalytic material is characterized in that a graphene oxide material is introduced, the property that an anionic natural high-molecular polysaccharide aqueous solution and divalent cations form stable gel is utilized, chemical coupling and in-situ deposition are adopted to load AgCl, and the Ag @ AgCl/GO photocatalytic material is prepared through photoinduced reduction.
2. The recyclable high-efficiency photocatalytic material as claimed in claim 1, wherein the anionic natural polymeric polysaccharide is sodium alginate or potassium alginate.
3. The recyclable high-efficiency photocatalytic material of claim 1, wherein the divalent cations are selected from Ca 2+ 、Cu 2+ Or Zn 2+ 。
4. The recyclable high-efficiency photocatalytic material according to claim 3, wherein the divalent cation is Ca 2+ 。
5. The method for preparing the recyclable high-efficiency photocatalytic material as claimed in claim 1, comprising the steps of:
(1) taking graphene oxide dispersion liquid, adding sodium alginate or potassium alginate solution, and performing ultrasonic dispersion to fully mix;
(2) adding cetyl trimethyl ammonium bromide into the mixed solution obtained in the step (2), and performing ultrasonic dispersion;
(3) slowly adding AgNO dropwise under stirring 3 After the solution is added dropwise, continuously stirring;
(4) slowly dripping CaCl into the suspension obtained in the step (3) under stirring 2 Forming insoluble small particles by the solution, stirring and standing;
(5) and (3) filtering the product obtained in the step (4) by using gauze, washing the obtained small-particle precipitate by using water, adding the small-particle precipitate into a container, adding water, stirring, placing in the sun for irradiation or placing under a xenon lamp light source for irradiation, filtering by using the gauze, washing by using the water, and performing vacuum freeze drying to obtain the Ag @ AgCl/GO photocatalytic material.
6. The method for preparing a recyclable high efficiency photocatalytic material as claimed in claim 5, wherein the gauze is a double layer gauze.
7. The application of the recyclable high-efficiency photocatalytic material as described in claim 1 in the preparation of water body cleaning agents.
8. The use of the recyclable high efficiency photocatalytic material of claim 1 in the preparation of photocatalysts.
9. The application of the recyclable high-efficiency photocatalytic material as defined in claim 1 in degrading rhodamine B, methylene blue and methyl orange.
10. The use of the recyclable high efficiency photocatalytic material of claim 1 for the degradation of tetracycline.
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