CN112452343A - AgI-Sb2O3Composite photocatalyst and preparation method and application thereof - Google Patents
AgI-Sb2O3Composite photocatalyst and preparation method and application thereof Download PDFInfo
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- 239000011941 photocatalyst Substances 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Inorganic materials O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims abstract description 73
- 239000002131 composite material Substances 0.000 claims abstract description 57
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims abstract description 28
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 claims abstract description 24
- 238000011065 in-situ storage Methods 0.000 claims abstract description 11
- 238000000151 deposition Methods 0.000 claims abstract description 8
- 238000013033 photocatalytic degradation reaction Methods 0.000 claims abstract description 8
- 229910001961 silver nitrate Inorganic materials 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 239000000725 suspension Substances 0.000 claims description 19
- 239000008367 deionised water Substances 0.000 claims description 11
- 229910021641 deionized water Inorganic materials 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 9
- 239000002244 precipitate Substances 0.000 claims description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 5
- PTRMIZWDUASYJC-UHFFFAOYSA-J [I-].[K+].[Sb+3].[I-].[I-].[I-] Chemical compound [I-].[K+].[Sb+3].[I-].[I-].[I-] PTRMIZWDUASYJC-UHFFFAOYSA-J 0.000 claims description 4
- 239000002957 persistent organic pollutant Substances 0.000 claims description 3
- 230000001699 photocatalysis Effects 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 3
- 230000004298 light response Effects 0.000 abstract description 3
- 239000000969 carrier Substances 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000002253 acid Substances 0.000 abstract 1
- LGZQSRCLLIPAEE-UHFFFAOYSA-M sodium 1-[(4-sulfonaphthalen-1-yl)diazenyl]naphthalen-2-olate Chemical compound [Na+].C1=CC=C2C(N=NC3=C4C=CC=CC4=CC=C3O)=CC=C(S([O-])(=O)=O)C2=C1 LGZQSRCLLIPAEE-UHFFFAOYSA-M 0.000 description 19
- 239000000463 material Substances 0.000 description 14
- 230000015556 catabolic process Effects 0.000 description 11
- 238000006731 degradation reaction Methods 0.000 description 11
- 239000003054 catalyst Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 238000013329 compounding Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 101710134784 Agnoprotein Proteins 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 230000000593 degrading effect Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000012265 solid product Substances 0.000 description 3
- YEAUATLBSVJFOY-UHFFFAOYSA-N tetraantimony hexaoxide Chemical compound O1[Sb](O2)O[Sb]3O[Sb]1O[Sb]2O3 YEAUATLBSVJFOY-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 238000007146 photocatalysis Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- -1 silver halide Chemical class 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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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
- 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
-
- 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
- B01J27/08—Halides
-
- 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
-
- 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
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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
- C02F2101/40—Organic compounds containing sulfur
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
The invention relates to AgI-Sb2O3The preparation method of the composite photocatalyst comprises the steps of preparing AgI-Sb by using antimony trioxide, potassium iodide and silver nitrate as raw materials and adopting an in-situ deposition method2O3A composite photocatalyst is provided. AgI-Sb2O3The preparation of the composite photocatalyst adopts an in-situ deposition method, and has the advantages of simple operation, mild reaction conditions and short preparation time; AgI-Sb prepared by in-situ deposition method2O3The composite photocatalyst can effectively promote the separation of photogenerated carriers, improve the photocatalytic activity of visible light, has strong visible light response, and can be used for treating acid red under the irradiation of the visible lightThe G solution has higher photocatalytic degradation activity, thereby embodying AgI-Sb2O3The composite photocatalyst has good photocatalytic performance under visible light.
Description
Technical Field
The invention relates to the technical field of photocatalysis and new materials, in particular to AgI-Sb2O3A composite photocatalyst and a preparation method and application thereof.
Background
At present, how to effectively treat environmental pollution, relieve energy crisis and realize sustainable development becomes an important research subject. The photocatalytic material and the technology can utilize inexhaustible solar energy in the nature to degrade pollutants and convert energy under mild conditions, and provide a new way for solving the energy and environment problems. Among the numerous photocatalytic materials, TiO2The photocatalyst material has the advantages of low cost, redox capability, high photochemical stability and the like, and becomes one of the currently concerned photocatalytic materials.
However, with TiO2Many of the traditional catalysts represented by the above are not fully capable of sustainable development, and one of the important reasons is that TiO is used as a catalyst2The band gap is wide and can only be excited under the irradiation of ultraviolet light, which causes low utilization rate of solar energy, and in addition, TiO2The lower quantum efficiency also severely limits its further applications. Therefore, a new type of LED with higher light under visible light is developedPhotocatalytic materials with catalytic activity have become a hotspot in the field of photocatalysis.
Antimony trioxide (Sb)2O3) Have been widely used as photocatalysts, flame retardant materials, gas and chemical sensors in optoelectronic and optoelectronic devices. Sb2O3As a photocatalyst, the photocatalyst has the defects of wide band gap, insufficient visible light absorption, small surface area, rapid recombination of photo-generated electron-hole pairs and the like, but the photocatalytic effect can be promoted by compounding with a material with narrow band gap, and in addition, silver halide has strong visible light response and is a hotspot of research in the current photocatalytic field because of prominent expression in photocatalytic degradation of environmental pollutants, wherein AgI has a narrow band gap but poor AgI stability and is easy to decompose under the irradiation of light, thereby seriously hindering the application of the silver halide in the photocatalytic field. Therefore, the semiconductor with the matched energy level structure is selected to be combined with the AgI to form the composite material, so that the absorption range of visible light and the photocatalytic stability of the visible light can be effectively enhanced, and the application of the composite material in the aspect of photocatalytic degradation of organic pollutants can be expanded.
Disclosure of Invention
The technical problem to be solved by the invention is to provide AgI-Sb2O3A composite photocatalyst, a preparation method and application thereof, aiming at overcoming the defects in the prior art.
The technical scheme for solving the technical problems is as follows: AgI-Sb2O3The preparation method of the composite photocatalyst comprises the following steps:
uses antimony trioxide, potassium iodide and silver nitrate as raw materials to prepare AgI-Sb by an in-situ deposition method2O3A composite photocatalyst is provided.
Further, the method specifically comprises the following steps:
s100, adding antimony trioxide into deionized water, and performing ultrasonic treatment to obtain an antimony trioxide suspension;
s200, adding potassium iodide into the antimony trioxide suspension under the condition of stirring to obtain potassium iodide-antimony trioxide suspension;
s300, dropwise adding a silver nitrate solution to the potassium iodide-antimony trioxide suspensionObtaining light yellow precipitate in the floating liquid, namely AgI-Sb2O3A composite photocatalyst is provided.
Further, AgI-Sb obtained in S3002O3AgI and Sb of composite photocatalyst2O3The mass ratio is 0.4: 1-0.8: 1.
AgI-Sb2O3The composite photocatalyst is prepared by the preparation method.
The AgI-Sb2O3AgI-Sb prepared by preparation method of composite photocatalyst2O3The application of the composite photocatalyst in photocatalytic degradation of organic pollutants.
The invention has the beneficial effects that:
AgI-Sb2O3the preparation of the composite photocatalyst adopts an in-situ deposition method, and has the advantages of simple operation, mild reaction conditions and short preparation time;
AgI-Sb prepared by in-situ deposition method2O3The composite photocatalyst can effectively promote the separation of photo-generated carriers, improve the photocatalytic activity of visible light, has strong visible light response, and has high photocatalytic degradation activity on an acid red G solution under the irradiation of visible light, thereby embodying the AgI-Sb2O3The composite photocatalyst has good photocatalytic performance under visible light.
Drawings
In FIG. 1, the respective curves are Sb2O3The composite photocatalysts prepared in the embodiments 1, 2 and 3 and an XRD spectrogram of AgI;
in FIG. 2, the curves are respectively the acid red G solution in AgI and Sb2O3The photocatalytic degradation effect curves of the composite photocatalysts prepared in the embodiments 1, 2 and 3 are shown.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
In the present invention, preparedAgI-Sb2O3The photocatalytic activity of the composite photocatalyst is evaluated by photocatalytic degradation of an acid red G solution. The experimental procedure was as follows: the initial concentration of acid red G is 50mg/L, a 420nm single-wavelength LED lamp (100W) is used as a lamp source to provide visible light, and 0.02G of AgI/Sb is weighed during the experiment2O3Adding 100mL of acid red G solution to simulate printing and dyeing wastewater in a 500mL beaker, and stirring for 30min under a dark condition to fully disperse the catalyst in the solution; then, turning on a light source, and sucking a small amount of reaction liquid every 10 min; the absorbance of the solution is measured by adopting an ultraviolet-visible spectrophotometer, so that the degradation rate of the acid red G solution in a certain time is calculated, and the AgI-Sb solution can be further degraded2O3And evaluating the photocatalytic activity of the composite photocatalyst.
Example 1
AgI-Sb2O3The preparation method of the composite photocatalyst comprises the following steps:
0.4g of Sb2O3Adding into 20mL deionized water, performing ultrasonic treatment for 10min to disperse uniformly to obtain white Sb2O3A suspension;
according to AgI and Sb2O30.1131gKI was weighed out at a mass ratio of 40% and added to the continuously stirred white Sb2O3Stirring the suspension for 10min at room temperature to obtain KI-Sb2O3Compounding the suspension;
according to AgI and Sb2O3Weighing 0.1158g of AgNO with the mass ratio of 40 percent3In 20mL of deionized water to obtain AgNO3A solution;
20mL of AgNO3The solution was added dropwise to KI-Sb with constant stirring2O3In-situ generation of AgI-Sb in composite suspension2O3Centrifuging the obtained solid product, washing the prepared precipitate with deionized water for 4 times, centrifuging, drying at 60 deg.C for 2 hr to obtain AgI-Sb2O3Composite photocatalyst, marked AgI-Sb2O3-1。
As shown in FIG. 1Shown, AgI-Sb2O3-1 sample XRD diffraction peak position and Sb2O3(JCPDS 05-0534) the standard peak positions are the same, indicating that Sb is in the composite catalyst2O3The phase is not changed; the XRD diffraction peak of AgI (JCPDS 09-0374) appears in the XRD pattern by adding potassium iodide and silver nitrate respectively, and the AgI-Sb is proved to be2O3-1 the composite material is successfully prepared.
AgI-Sb synthesized in this example 12O3In an experiment for degrading an acid red G solution, the dosage of the composite photocatalyst is 200mg/L, and the degradation rate of the acid red G solution is about 70% after 60min (see figure 2); sb2O3The material has no degradation to the acid red G solution within 60min under visible light, and the degradation rate of the AgI material to the acid red G solution within 60min under visible light is only 5%, which indicates that the AgI-Sb prepared by the method has high stability and good stability2O3The composite photocatalyst has good photocatalytic activity.
Example 2
AgI-Sb2O3The preparation method of the composite photocatalyst comprises the following steps:
0.4g of Sb2O3Adding into 20mL deionized water, performing ultrasonic treatment for 10min to disperse uniformly to obtain white Sb2O3A suspension;
according to AgI and Sb2O30.1697gKI was weighed in an amount of 60% by mass and added to the continuously stirred white Sb2O3Stirring the suspension for 10min at room temperature to obtain KI-Sb2O3Compounding the suspension;
according to AgI and Sb2O3Weighing 0.1737g of AgNO with the mass ratio of 60 percent3In 20mL of deionized water to obtain AgNO3A solution;
20mL of AgNO3The solution was added dropwise to KI-Sb with constant stirring2O3In-situ generation of AgI-Sb in composite suspension2O3The composite material is prepared by centrifugally separating the obtained solid product, washing the prepared precipitate with deionized water for 4 times, centrifugally separating, drying at 60 ℃ for 2 hours and finally obtaining AgI-Sb2O3Composite photocatalyst, marked AgI-Sb2O3-2。
As shown in FIG. 1, AgI-Sb2O3-2 sample XRD diffraction peak position and Sb2O3(JCPDS 05-0534) the standard peak positions are the same, indicating that Sb is in the composite catalyst2O3The phase is not changed; the XRD diffraction peak of AgI (JCPDS 09-0374) appears in the XRD pattern by adding potassium iodide and silver nitrate respectively, and the AgI-Sb is proved to be2O3-2 successful preparation of composite materials with AgI and Sb2O3The increase of the amount of addition and the increase of the intensity of the XDD diffraction peak of AgI indicate that AgI-Sb2O3Increase in AgI content in-2.
The AgI-Sb synthesized in example 22O3In an experiment for degrading an acid red G solution, the dosage of the composite photocatalyst is 200mg/L, and the degradation rate of the acid red G solution is about 98% after 60min (see figure 2); sb2O3The material has no degradation to acid red G solution within 60min under visible light, the degradation rate of AgI material to acid red G solution within 60min under visible light is only 5%, and AgI-Sb prepared by in-situ deposition method2O3The degradation rate of the composite photocatalyst to acid red G solution reaches 98 percent, and the photocatalytic activity of the composite photocatalyst is far higher than that of Sb2O3And AgI, illustrating AgI-Sb prepared by the method2O3In the composite photocatalyst, AgI and Sb2O3The composite of (A) and (B) is beneficial to enhancing the absorption range of visible light and the photocatalytic reaction.
Example 3
AgI-Sb2O3The preparation method of the composite photocatalyst comprises the following steps:
0.4g of Sb2O3Adding into 20mL deionized water, performing ultrasonic treatment for 10min to disperse uniformly to obtain white Sb2O3A suspension;
according to AgI and Sb2O30.2263gKI is weighed and added into white Sb which is continuously stirred according to the mass ratio of 80 percent2O3Stirring the suspension at room temperature for 10min to obtainKI-Sb2O3Compounding the suspension;
according to AgI and Sb2O3Weighing 0.2316g of AgNO with the mass ratio of 80 percent3In 20mL of deionized water to obtain AgNO3A solution;
20mL of AgNO3The solution was added dropwise to KI-Sb with constant stirring2O3In-situ generation of AgI-Sb in composite suspension2O3Centrifuging the obtained solid product, washing the prepared precipitate with deionized water for 4 times, centrifuging, drying at 60 deg.C for 2 hr to obtain AgI-Sb2O3Composite photocatalyst, marked AgI-Sb2O3-3。
As shown in FIG. 1, AgI-Sb2O3-3 sample XRD diffraction peak position and Sb2O3(JCPDS 05-0534) the standard peak positions are the same, indicating that Sb is in the composite catalyst2O3The phase is not changed; the XRD diffraction peak of AgI (JCPDS 09-0374) appears in the XRD pattern by adding potassium iodide and silver nitrate respectively, and the AgI-Sb is proved to be2O3-3 the composite material was successfully prepared, and with AgI and Sb2O3The increase of the amount of addition and the increase of the intensity of the XDD diffraction peak of AgI indicate that AgI-Sb2O3-3 increased AgI content.
The AgI-Sb synthesized in example 32O3In an experiment for degrading an acid red G solution, the dosage of the composite photocatalyst is 200mg/L, and the degradation rate of the acid red G solution is about 83% after 60min (see figure 2); sb2O3The material has no degradation to the acid red G solution within 60min under visible light, and the degradation rate of the AgI material to the acid red G solution within 60min under visible light is only 5%, which indicates that the AgI-Sb prepared by the method has high stability and good stability2O3The composite photocatalyst has good photocatalytic activity.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (5)
1. AgI-Sb2O3The preparation method of the composite photocatalyst is characterized by comprising the following steps:
uses antimony trioxide, potassium iodide and silver nitrate as raw materials to prepare AgI-Sb by an in-situ deposition method2O3A composite photocatalyst is provided.
2. An AgI-Sb according to claim 12O3The preparation method of the composite photocatalyst is characterized by comprising the following steps:
s100, adding antimony trioxide into deionized water, and performing ultrasonic treatment to obtain an antimony trioxide suspension;
s200, adding potassium iodide into the antimony trioxide suspension under the condition of stirring to obtain potassium iodide-antimony trioxide suspension;
s300, dropwise adding a silver nitrate solution into the potassium iodide-antimony trioxide suspension to obtain a light yellow precipitate, namely AgI-Sb2O3A composite photocatalyst is provided.
3. An AgI-Sb according to claim 22O3The preparation method of the composite photocatalyst is characterized in that AgI-Sb obtained in S3002O3AgI and Sb of composite photocatalyst2O3The mass ratio is 0.4: 1-0.8: 1.
4. AgI-Sb2O3The composite photocatalyst is prepared by the preparation method of any one of claims 1 to 3.
5. AgI-Sb as claimed in any one of claims 1 to 32O3AgI-Sb prepared by preparation method of composite photocatalyst2O3The application of the composite photocatalyst in photocatalytic degradation of organic pollutants.
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