CN113926471A - Preparation method of BiOCl photocatalyst and method for finishing polyester fabric by using BiOCl photocatalyst - Google Patents
Preparation method of BiOCl photocatalyst and method for finishing polyester fabric by using BiOCl photocatalyst Download PDFInfo
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- CN113926471A CN113926471A CN202111265673.6A CN202111265673A CN113926471A CN 113926471 A CN113926471 A CN 113926471A CN 202111265673 A CN202111265673 A CN 202111265673A CN 113926471 A CN113926471 A CN 113926471A
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- BWOROQSFKKODDR-UHFFFAOYSA-N oxobismuth;hydrochloride Chemical compound Cl.[Bi]=O BWOROQSFKKODDR-UHFFFAOYSA-N 0.000 title claims abstract description 95
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000004744 fabric Substances 0.000 title claims description 58
- 229920000728 polyester Polymers 0.000 title claims description 49
- 239000011259 mixed solution Substances 0.000 claims abstract description 19
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 239000008367 deionised water Substances 0.000 claims abstract description 12
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 12
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 11
- FBXVOTBTGXARNA-UHFFFAOYSA-N bismuth;trinitrate;pentahydrate Chemical compound O.O.O.O.O.[Bi+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FBXVOTBTGXARNA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011780 sodium chloride Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000000227 grinding Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 6
- 238000004321 preservation Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 239000012265 solid product Substances 0.000 claims abstract description 6
- 238000001132 ultrasonic dispersion Methods 0.000 claims abstract description 6
- 238000005406 washing Methods 0.000 claims abstract description 6
- 239000000243 solution Substances 0.000 claims description 17
- 238000009832 plasma treatment Methods 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000012495 reaction gas Substances 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 abstract description 12
- 238000006731 degradation reaction Methods 0.000 abstract description 12
- 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 abstract description 12
- 229940043267 rhodamine b Drugs 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 7
- 238000001782 photodegradation Methods 0.000 abstract description 2
- 238000005286 illumination Methods 0.000 abstract 1
- 229940073609 bismuth oxychloride Drugs 0.000 description 80
- 230000001699 photocatalysis Effects 0.000 description 10
- 238000012360 testing method Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 238000007598 dipping method Methods 0.000 description 5
- 230000006750 UV protection Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- 229910052724 xenon Inorganic materials 0.000 description 4
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 4
- 229920004934 Dacron® Polymers 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000593 degrading effect Effects 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000001027 hydrothermal synthesis Methods 0.000 description 3
- 238000007146 photocatalysis Methods 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004729 solvothermal method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Classifications
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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
- 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
-
- B01J35/39—
-
- 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
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
- D06M10/025—Corona discharge or low temperature plasma
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/07—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof
- D06M11/30—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof with oxides of halogens, oxyacids of halogens or their salts, e.g. with perchlorates
-
- 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
-
- 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
- C02F2101/34—Organic compounds containing oxygen
-
- 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
- C02F2101/36—Organic compounds containing halogen
-
- 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
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/32—Polyesters
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/25—Resistance to light or sun, i.e. protection of the textile itself as well as UV shielding materials or treatment compositions therefor; Anti-yellowing treatments
Abstract
The invention relates to a preparation method of a BiOCl photocatalyst, which comprises the steps of adding bismuth nitrate pentahydrate and sodium chloride into deionized water, stirring uniformly, carrying out ultrasonic dispersion to obtain a mixed solution, adjusting the pH value of the mixed solution to 3-4, pouring the mixed solution into a high-pressure reaction kettle with a polytetrafluoroethylene lining, sealing, putting the mixed solution into a constant-temperature incubator, heating to 150 ℃, carrying out heat preservation reaction for 11-14h, cooling to room temperature, taking out a reaction product, respectively carrying out centrifugal washing by using absolute ethyl alcohol and deionized water, drying a solid product, and grinding to obtain the BiOCl photocatalyst. The method is simple to operate and low in cost, the prepared BiOCl photocatalyst has excellent photodegradation activity on rhodamine B under ultraviolet light, and the degradation rate reaches 98.3% after illumination for 60 min.
Description
Technical Field
The invention relates to a preparation method of a BiOCl photocatalyst and a method for finishing polyester fabrics by using the BiOCl photocatalyst, belonging to the technical field of environmental engineering and textile industry.
Background
As society is continuously developing toward industrialization, the problem of environmental pollution is increasingly worsened. The traditional method for treating the environmental pollution problem has many disadvantages, even some methods only transfer the pollutants, and the pollutants can not disappear from the source at all. Therefore, how to efficiently and environmentally solve the problem of environmental pollution is the key content of scientific research nowadays. The photocatalytic technology is produced in the social environment. The photocatalysis technology is a technology for achieving the purpose of degrading pollutants by utilizing solar catalysis, is a green environment-friendly technology, does not generate pollutants in the whole photocatalysis process, can perform very effective catalytic degradation on the pollutants, is inexhaustible solar energy, is an ideal clean energy source at present, and is a novel photocatalyst which undoubtedly becomes a research hotspot under the present situation.
Current international forum for TiO2The photocatalyst has been studied extensively and extensively, however, TiO2The band gap energy is larger, so that the ultraviolet light with the wavelength less than 387nm can be absorbed, and the visible light cannot be responded, thereby hindering the development and the application of the ultraviolet light. BiOCl is a non-toxic inorganic semiconductor material possessing properties comparable to those of TiO2A positive conduction band potential and a wide forbidden band width, and in addition, BiOCl is a layered compound with a structure of [ Cl-Bi-O-Bi-Cl ]]In the arrangement of (1), i.e. bis Cl-Ionic layer and [ Bi2O2]2+A layered structure of alternating layers, which results in [ Bi ]2O2]2+An internal electric field exists between the ionic layer and the C1 ion layer, and the electron and hole pairs are favorable to follow the [001 ] direction]The direction is effectively separated, and the high oxygen atom density on the (001) crystal face ensures that the high oxygen atom density has high adsorption capacity on the dye, thereby being beneficial to improving the degradation efficiency. Thus, bismuth oxychloride (BiOCl) is becoming one of the more currently studied visible-light responsive photocatalysts.
At present, the methods for preparing BiOCl mainly comprise a hydrothermal method, a hydrolysis method, a solvothermal method and the like, wherein the hydrothermal method has simple requirements on experimental equipment and is easy to operate, but the BiOCl prepared by the hydrothermal method in the prior art has the problem of poor photocatalytic performance.
On the other hand, BiOCl photocatalysts have been used in the field of sewage treatment. The Zhao Yang takes BiOCl as a representative photocatalyst, modifies the BiOCl and explores the application of the photocatalysis of the BiOCl in the field of treating polluted wastewater by degrading an organic dye rhodamine B in water. Although the method can show that the BiOCl photocatalyst can degrade the organic dye rhodamine B in water, the method has the problem that the photocatalyst cannot be recycled after being used, and the utilization rate is low. If the photocatalyst is arranged on the textile fabric to treat sewage, the sewage treatment can be effectively carried out, and the problem that the photocatalyst cannot be recycled after being thrown into water does not exist. However, the polyester fabric has smooth surface and less active groups, which is not beneficial to the finishing combination with the photocatalyst.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a preparation method of a BiOCl photocatalyst, which is simple to operate and low in cost, and the prepared BiOCl photocatalyst has excellent photocatalytic performance.
The invention also aims to provide a method for finishing the polyester fabric by using the BiOCl photocatalyst.
Technical scheme
A preparation method of a BiOCl photocatalyst comprises the following steps:
(1) adding bismuth nitrate pentahydrate and sodium chloride into deionized water, stirring uniformly, performing ultrasonic dispersion to obtain a mixed solution, and adjusting the pH of the mixed solution to 3-4;
(2) pouring the mixed solution into a high-pressure reaction kettle with a polytetrafluoroethylene lining, sealing, putting into a constant-temperature incubator, heating to 150 ℃, carrying out heat preservation reaction for 11-14h, cooling to room temperature, and taking out a reaction product;
(3) and (3) centrifugally washing the reaction product by using absolute ethyl alcohol and deionized water respectively, drying the obtained solid product, and grinding to obtain the BiOCl photocatalyst.
Further, in the step (1), the molar ratio of the bismuth nitrate pentahydrate to the sodium chloride is 1: 1.
Further, in the step (2), the drying temperature is 60 ℃ and the time is 4-6 h.
The method for finishing the polyester fabric by using the BiOCl photocatalyst prepared by the method comprises the following steps:
1) cleaning and drying the polyester fabric, and then placing the polyester fabric in a plasma treatment instrument for plasma treatment to obtain a modified polyester fabric;
2) preparing a BiOCl photocatalyst solution with the concentration of 0.5-5g/L by using a BiOCl photocatalyst, immersing the modified polyester fabric into the BiOCl photocatalyst solution, fully oscillating, taking out the fabric, and drying to obtain the polyester fabric loaded with the BiOCl photocatalyst.
Further, in the step 1), the reaction gas in the plasma treatment instrument is argon, the treatment time is 5min, and the power of the plasma treatment is 100-400 w.
The invention has the beneficial effects that:
the invention provides a preparation method of a BiOCl photocatalyst, which is simple to operate and low in cost, the prepared BiOCl photocatalyst has excellent photodegradation activity on rhodamine B under ultraviolet light, and the degradation rate reaches 98.3% after the prepared BiOCl photocatalyst is illuminated for 60 min.
Drawings
FIG. 1 is an SEM image of a BiOCl photocatalyst prepared in example 1;
FIG. 2 is a graph showing the degradation curve of the BiOCl photocatalyst prepared in example 1 and comparative examples 1-2 for rhodamine B under ultraviolet light;
FIG. 3 is an SEM image of a BiOCl photocatalyst-loaded polyester fabric obtained by dipping in a 0.5g/L BiOCl photocatalyst solution;
FIG. 4 is an XRD (X-ray diffraction) pattern of a polyester fabric loaded with BiOCl photocatalyst and obtained by dipping in 0.5g/L BiOCl photocatalyst solution;
FIG. 5 shows the self-cleaning performance test result of the polyester fabric loaded with BiOCl photocatalyst.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
Example 1
A preparation method of a BiOCl photocatalyst comprises the following steps:
(1) adding 2mmol of bismuth nitrate pentahydrate and 2mmol of sodium chloride into 40mL of deionized water, stirring uniformly, then performing ultrasonic dispersion for 30min to obtain a mixed solution, and adjusting the pH value of the mixed solution to 4;
(2) pouring the mixed solution into a high-pressure reaction kettle with a polytetrafluoroethylene lining, sealing, putting into a constant-temperature incubator, heating to 150 ℃, carrying out heat preservation reaction for 12 hours, then cooling to room temperature, and taking out a reaction product;
(3) and (3) respectively carrying out centrifugal washing on the reaction product by using absolute ethyl alcohol and deionized water, drying the obtained solid product at 60 ℃ for 4 hours, and finally grinding to obtain the BiOCl photocatalyst (marked as BiOCl-A).
The SEM image of the BiOCl photocatalyst prepared in example 1 is shown in fig. 1, and it can be seen that the BiOCl photocatalyst exhibits an apparent structure of a plate shape.
Comparative example 1
A preparation method of a BiOCl photocatalyst comprises the following steps:
(1) adding 2mmol of bismuth nitrate pentahydrate and 2mmol of sodium chloride into 40mL of deionized water, stirring uniformly, then performing ultrasonic dispersion for 30min to obtain a mixed solution, and adjusting the pH value of the mixed solution to 9;
(2) pouring the mixed solution into a high-pressure reaction kettle with a polytetrafluoroethylene lining, sealing, putting into a constant-temperature incubator, heating to 150 ℃, carrying out heat preservation reaction for 12 hours, then cooling to room temperature, and taking out a reaction product;
(3) and (3) respectively carrying out centrifugal washing on the reaction product by using absolute ethyl alcohol and deionized water, drying the obtained solid product at 60 ℃ for 4 hours, and finally grinding to obtain the BiOCl photocatalyst (marked as BiOCl-B).
Comparative example 2
A preparation method of a BiOCl photocatalyst comprises the following steps:
(1) adding 2mmol of bismuth nitrate pentahydrate and 2mmol of sodium chloride into 40mL of deionized water, stirring uniformly, then performing ultrasonic dispersion for 30min to obtain a mixed solution, and adjusting the pH value of the mixed solution to 7;
(2) pouring the mixed solution into a high-pressure reaction kettle with a polytetrafluoroethylene lining, sealing, putting into a constant-temperature incubator, heating to 150 ℃, carrying out heat preservation reaction for 12 hours, then cooling to room temperature, and taking out a reaction product;
(3) and (3) respectively carrying out centrifugal washing on the reaction product by using absolute ethyl alcohol and deionized water, drying the obtained solid product at 60 ℃ for 4 hours, and finally grinding to obtain the BiOCl photocatalyst (marked as BiOCl-C).
The photocatalytic performance of the BiOCl photocatalysts prepared in example 1 and comparative examples 1-2 was tested by the following specific method: adding 0.1g of BiOCl photocatalyst (BiOCl-A, BiOCl-B and BiOCl-C) into 10mg/L rhodamine B solution, stirring for 30min by using a magnetic stirrer in the dark, then continuously illuminating under a xenon lamp (a xenon lamp light source is ultraviolet light), transferring the solution by using a rubber head dropper every 5min, transferring the solution into a test tube, placing the test tube into a centrifuge, centrifuging for 3min at the rotating speed of 1000rpm, placing the test tube into a quartz cuvette after the centrifugation is finished, and testing the absorbance of the centrifuged solution by using an ultraviolet-visible spectrophotometer, wherein the result is shown in figure 2.
Fig. 2 is a degradation curve of the BiOCl photocatalyst prepared in example 1 and comparative examples 1-2 on rhodamine B under ultraviolet light, and it can be seen that the photocatalytic performance of the BiOCl-a prepared in example 1 is the best, the degradation rate is as high as 98.3%, the photocatalytic effect of the BiOCl photocatalyst prepared in comparative example 1 is the second, the degradation rate is 97.8%, the degradation effect of the BiOCl prepared in comparative example 2 on rhodamine B is the worst, and the degradation rate is 91.8%. This shows that the BiOCl photocatalytic performance with an exposed (001) surface prepared in an acidic environment has a better degradation effect on pollutants under ultraviolet light.
Polyester fabric was finished using the BiOCl photocatalyst prepared in example 1:
1) cleaning and drying a polyester fabric with the specification of 30cm multiplied by 6cm, and then placing the polyester fabric into a plasma treatment instrument for plasma treatment, wherein the reaction gas in the plasma treatment instrument is argon, the treatment time is 5min, and the power of the plasma treatment is 400W, so as to obtain the modified polyester fabric;
2) preparing a BiOCl photocatalyst solution with the concentration of (0.5g/L, 1g/L, 3g/L and 5g/L) by using a BiOCl photocatalyst, immersing the modified polyester fabric into the BiOCl photocatalyst solution, fully oscillating, taking out the fabric and drying to obtain the polyester fabric loaded with the BiOCl photocatalysts with different concentrations.
Fig. 3 is an SEM image of the polyester fabric loaded with the BiOCl photocatalyst obtained by dipping in 0.5g/L of the BiOCl photocatalyst solution, and it can be seen that a large amount of flaky substances, i.e., BiOCl photocatalyst particles, are attached to the polyester fabric, indicating that the BiOCl photocatalyst is successfully loaded on the polyester fabric by the dipping method.
Fig. 4 is an XRD pattern of the BiOCl photocatalyst-loaded dacron fabric obtained by dipping in 0.5g/L of the solution of the BiOCl photocatalyst, where fig. 4a is the BiOCl photocatalyst prepared in example 1, and fig. 4b is the dacron fabric loaded with the BiOCl photocatalyst, and it can be seen that the BiOCl photocatalyst and the dacron fabric loaded with the BiOCl photocatalyst have distinct characteristic peaks at 11.982 °, 24.098 °, 25.863 °, 32.496 °, 33.445 °, 36.541 °, 40.893 °, 46.635 °, 49.698 °, 54.093 °, 55.114 °, and 58.599 °, corresponding to the main peak of the standard BiOCl structure (JCPDS No.06-246), and the corresponding crystal planes are (001) (101) (110) (102) (112) (200) (113) (104) (212). Indicating that BiOCl has been successfully loaded on the polyester fabric.
1. Testing ultraviolet resistance of polyester fabric loaded with BiOCl photocatalysts with different concentrations
The test method is carried out according to GB/T18830-2002, and a textile ultraviolet resistance tester is adopted for testing, and the results are shown in a table 1:
TABLE 1
As can be seen from table 1, as the concentration of the BiOCl loaded on the polyester fabric increases, the ultraviolet resistance (UPF) of the polyester fabric is gradually improved, which indicates that as the concentration of the BiOCl increases, the more the BiOCl photocatalyst is loaded on the polyester fabric, the better the ultraviolet resistance of the polyester fabric is.
2. Testing the self-cleaning performance of polyester fabric loaded with BiOCl photocatalyst (0.5g/L)
The test method comprises the following steps: dripping a drop of rhodamine B solution with the concentration of 5g/L onto a polyester fabric obtained by using 0.5g/L BiOCl photocatalyst solution for finishing, then placing the polyester fabric under visible light of a xenon lamp for irradiation, taking a picture every two hours to record the effect change of degrading the rhodamine B, and stopping the irradiation when the rhodamine B dye is almost completely degraded; under the same technical condition, a 5g/L rhodamine B solution is dripped one drop on a polyester fabric which is not finished by BiOCl, the polyester fabric is placed under a xenon lamp for the same time, and degradation changes of the dye are recorded by photographing every two hours. And comparing and analyzing the effect graphs obtained by the two experiments to judge whether the self-cleaning effect of the polyester fabric is optimized after the BiOCl is finished. The results are shown in FIG. 5.
Fig. 5 is a result of a self-cleaning performance test of a polyester fabric loaded with a BiOCl photocatalyst, where fig. 5a is the polyester fabric loaded with the BiOCl photocatalyst, and fig. 5b is the polyester fabric not finished with BiOCl, and it can be seen that the polyester fabric has the self-cleaning performance of the BiOCl photocatalyst after being finished with the BiOCl photocatalyst.
3. Testing tensile property of polyester fabric loaded with BiOCl photocatalysts with different concentrations
Test method according to GB/T3923-1997, the breaking strength and elongation at break of the fabric are tested with an electronic fabric strength tester. The results are shown in Table 2:
TABLE 2
As can be seen from Table 2, as the BiOCl concentration of the finished polyester fabric is increased, the strength of the polyester fabric is also improved but the overall change is small, which indicates that the finished polyester fabric still maintains good mechanical properties.
Claims (5)
1. A preparation method of a BiOCl photocatalyst is characterized by comprising the following steps:
(1) adding bismuth nitrate pentahydrate and sodium chloride into deionized water, stirring uniformly, performing ultrasonic dispersion to obtain a mixed solution, and adjusting the pH of the mixed solution to 3-4;
(2) pouring the mixed solution into a high-pressure reaction kettle with a polytetrafluoroethylene lining, sealing, putting into a constant-temperature incubator, heating to 150 ℃, carrying out heat preservation reaction for 11-14h, cooling to room temperature, and taking out a reaction product;
(3) and (3) centrifugally washing the reaction product by using absolute ethyl alcohol and deionized water respectively, drying the obtained solid product, and grinding to obtain the BiOCl photocatalyst.
2. The method of preparing a BiOCl photocatalyst according to claim 1, wherein in step (1), the molar ratio of bismuth nitrate pentahydrate to sodium chloride is 1: 1.
3. The method for preparing a BiOCl photocatalyst as claimed in claim 1 or 2, wherein in the step (2), the drying temperature is 60 ℃ and the time is 4-6 hours.
4. A process for finishing polyester fabrics with the BiOCl photocatalyst prepared by the process of claim 1 or 2 or 3, characterized by comprising the steps of:
1) cleaning and drying the polyester fabric, and then placing the polyester fabric in a plasma treatment instrument for plasma treatment to obtain a modified polyester fabric;
2) preparing a BiOCl photocatalyst solution with the concentration of 0.5-5g/L by using a BiOCl photocatalyst, immersing the modified polyester fabric into the BiOCl photocatalyst solution, fully oscillating, taking out the fabric, and drying to obtain the polyester fabric loaded with the BiOCl photocatalyst.
5. The method as claimed in claim 4, wherein in step 1), the reaction gas in the plasma treatment apparatus is argon, the treatment time is 5min, and the power of the plasma treatment is 100-400 w.
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