CN108114736B - Ag-doped BiFeO loaded on zeolite3/Bi2Fe4O9Composite material and preparation method and application thereof - Google Patents
Ag-doped BiFeO loaded on zeolite3/Bi2Fe4O9Composite material and preparation method and application thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title abstract description 12
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000002131 composite material Substances 0.000 claims abstract description 34
- 239000010457 zeolite Substances 0.000 claims abstract description 34
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 32
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910002897 Bi2Fe4O9 Inorganic materials 0.000 claims abstract description 31
- 229910002902 BiFeO3 Inorganic materials 0.000 claims abstract description 21
- 230000001699 photocatalysis Effects 0.000 claims abstract description 14
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000004202 carbamide Substances 0.000 claims abstract description 11
- 239000002351 wastewater Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000000746 purification Methods 0.000 claims abstract description 4
- 239000011259 mixed solution Substances 0.000 claims description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 20
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 18
- 239000008367 deionised water Substances 0.000 claims description 16
- 229910021641 deionized water Inorganic materials 0.000 claims description 16
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(I) nitrate Inorganic materials [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 8
- 238000001354 calcination Methods 0.000 claims description 7
- 239000011941 photocatalyst Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 4
- 229910052678 stilbite Inorganic materials 0.000 claims description 4
- JYIBXUUINYLWLR-UHFFFAOYSA-N aluminum;calcium;potassium;silicon;sodium;trihydrate Chemical compound O.O.O.[Na].[Al].[Si].[K].[Ca] JYIBXUUINYLWLR-UHFFFAOYSA-N 0.000 claims description 3
- 229910001603 clinoptilolite Inorganic materials 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229910052680 mordenite Inorganic materials 0.000 claims description 3
- 229910052908 analcime Inorganic materials 0.000 claims description 2
- 239000012298 atmosphere Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 7
- 239000012716 precipitator Substances 0.000 abstract description 2
- 230000007062 hydrolysis Effects 0.000 abstract 1
- 238000006460 hydrolysis reaction Methods 0.000 abstract 1
- 229910052797 bismuth Inorganic materials 0.000 description 8
- 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 description 8
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 7
- 230000003197 catalytic effect Effects 0.000 description 6
- 229940043267 rhodamine b Drugs 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000005215 recombination Methods 0.000 description 5
- 230000006798 recombination Effects 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 239000011358 absorbing material Substances 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000012299 nitrogen atmosphere Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
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- 231100000719 pollutant Toxicity 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910001579 aluminosilicate mineral Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000010919 dye waste Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 230000005389 magnetism Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 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
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/18—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type
- B01J29/26—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
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- B01J29/00—Catalysts comprising molecular sieves
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- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/076—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
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- B01J29/00—Catalysts comprising molecular sieves
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- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/50—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the erionite or offretite type, e.g. zeolite T, as exemplified by patent document US2950952
- B01J29/58—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the erionite or offretite type, e.g. zeolite T, as exemplified by patent document US2950952 containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
The invention discloses a zeolite-loaded Ag-doped BiFeO3/Bi2Fe4O9The preparation method of the invention adopts urea hydrolysis as a precipitator, thereby avoiding BiFeO3/Bi2Fe4O9The strong base is used in the preparation process, the process is simple, and no waste water is generated. The zeolite prepared by the invention is loaded with Ag and doped with BiFeO3/Bi2Fe4O9The composite material has magnetic recovery and photocatalytic performance, and can be applied to dye wastewater and Cu-containing materials2+Photocatalytic purification of waste water.
Description
Technical Field
The invention relates to a zeolite-loaded Ag-doped BiFeO3/Bi2Fe4O9A composite material and a preparation method and application thereof, belonging to the technical field of development and preparation of non-metallic mineral environment-friendly purification materials.
Background
The zeolite is a hydrous framework aluminosilicate mineral, is beneficial to the enrichment of pollutants due to the unique pore structure, the super-strong adsorption capacity and the special ion exchange capacity, is regarded as a photocatalyst carrier material with a very good application prospect, and is beneficial to relieving the problems of current energy and environment.
At present, most of the researches are carried out by taking zeolite as a carrier to load the TiO of the traditional semiconductor material2① patent name of Chinese invention is' a nanometer titanium dioxideA zeolite composite photocatalytic material and its preparing process, wherein the application numbers are 200510027382.8, ② Sun Q, Hu X, Zheng S, et al2Powder Technology,2015,274:88-97, due to TiO2Can only absorb ultraviolet light with the wavelength less than 390nm, and the proportion of the ultraviolet light in the sunlight is less than 5 percent, so most natural light can not be absorbed by TiO2③ Chinese invention patent name is 'porous graphene-zeolite-bismuth oxyhalide photocatalytic material and preparation and application', application number is 201610471976.6, but because the bismuth-based composite photocatalytic material loaded by the zeolite is powdery, the bismuth-based composite photocatalytic material is difficult to recover by sedimentation when used for purifying pollutants in water, so the bismuth ferrite is used as one of the bismuth-based photocatalysts and has the advantages of magnetism and photocatalytic performance, and the common bismuth ferrite compound has FeO BiBiA3、Bi2Fe4O9Etc. BiFeO3And Bi2Fe4O9Belongs to a semiconductor material with narrow forbidden band width, BiFeO3And Bi2Fe4O9The forbidden band widths of the light-absorbing material are respectively about 2.2eV and 2.0eV, the light-absorbing material can absorb visible light to perform a photocatalytic reaction, and the potential application of the light-absorbing material in the field of photocatalysis draws wide attention of researchers. But of the monomeric system BiFeO3Or Bi2Fe4O9When the catalyst is used, photo-generated carriers are easy to recombine on the surface or inside, the defects of high carrier recombination rate and low catalytic efficiency exist, and the defect of high carrier recombination rate needs to be improved by adopting a noble metal doping or semiconductor recombination mode.
Based on the research background, the preparation of the bismuth ferrite/zeolite composite photocatalytic material is beneficial to solving the problem of recycling the zeolite-based composite photocatalyst, and Ag is doped and BiFeO is doped3/Bi2Fe4O9Semiconductor recombination is beneficial to separation of photon-generated carriers, and further quantum efficiency and catalytic efficiency are improved. Therefore, the development of a novel zeolite-supported Ag-doped BiFeO3/Bi2Fe4O9The composite material has important social significance and environmental protection value.
Disclosure of Invention
In order to overcome the defects, the invention provides a zeolite-loaded Ag-doped BiFeO3/Bi2Fe4O9The composite material, the preparation method and the application thereof solve the defects that the existing zeolite-based composite photocatalytic material is weak in visible light catalytic performance and poor in recyclability, and a single semiconductor photocatalyst carrier is easy to compound.
In order to achieve the purpose, the invention adopts the following technical scheme:
ag-doped BiFeO loaded on zeolite3/Bi2Fe4O9A composite material characterized by: the zeolite-loaded Ag-doped BiFeO3/Bi2Fe4O9The composite material is prepared by the following method:
(1) zeolite, Fe (NO)3)3·9H2O and AgNO3Stirring and dispersing in deionized water to obtain a mixed solution A; the zeolite and Fe (NO)3)3·9H2O、AgNO3The mass ratio of the deionized water to the deionized water is 1: 0.404-0.808: 0.02-0.08: 12-20;
(2) adding Bi (NO)3)3·5H2Stirring and dissolving the O in ethylene glycol to obtain a mixed solution B; said Bi (NO)3)3·5H2The mass ratio of O to glycol is 1: 5.36-6.43;
(3) dissolving urea in deionized water to obtain a mixed solution C; the mass ratio of the urea to the deionized water is 1: 6-10;
(4) slowly adding the mixed solution A obtained in the step (1) into the mixed solution B obtained in the step (2), stirring to obtain a mixed solution D, then slowly adding the mixed solution C obtained in the step (3) into the mixed solution D, and stirring to obtain a mixed solution E; zeolite added to the mixed solution aWith Bi (NO) charged into the liquid mixture B3)3·5H2The mass ratio of the O to the urea added into the mixed liquid C is 1: 0.4851-0.9702: 1.6-2;
(5) placing the mixed solution E obtained in the step (4) at 95-98 ℃ for reaction to obtain a sol product, drying the sol product to obtain gel, placing the gel in a 560-580 ℃ tubular furnace, and calcining in an inert gas atmosphere to obtain the zeolite-loaded Ag-doped BiFeO3/Bi2Fe4O9A composite material.
Further, in the step (1), the zeolite is natural stilbite, clinoptilolite, mordenite or analcime, and is preferably natural stilbite.
Further, in the step (5), the drying temperature is 120-130 ℃.
Further, in the step (5), the inert gas is nitrogen.
Further, in the step (5), the calcination time is 2-3 h.
The zeolite prepared by the invention is loaded with Ag and doped with BiFeO3/Bi2Fe4O9The composite material can replace TiO2CdS and other traditional photocatalyst applied in dye waste water and Cu-containing2+Photocatalytic purification of waste water.
Compared with the prior art, the invention has the beneficial effects that:
(1) the zeolite of the invention is loaded with Ag and doped with BiFeO3/Bi2Fe4O9The composite material has both magnetic recoverability and visible light catalytic performance, and can improve the recovery and reuse performance of the zeolite-based composite photocatalyst;
(2) the zeolite of the invention is loaded with Ag and doped with BiFeO3/Bi2Fe4O9The composite material is prepared by doping Ag and BiFeO3/Bi2Fe4O9The two photocatalytic heterostructure can inhibit the recombination rate of photon-generated carriers and has better visible light catalytic performance;
(3) the preparation method of the invention adopts urea as a precipitator, avoids the use of strong alkali in the preparation process of bismuth ferrite, has no wastewater generation in the whole preparation process, and has short flow and little pollution.
Drawings
FIG. 1 shows that the zeolite of example 1 of the present invention is loaded with Ag doped BiFeO3/Bi2Fe4O9XRD pattern of the composite.
Detailed Description
The present invention is further illustrated by the following specific examples, but the scope of the invention is not limited thereto.
Example 1:
(1) weighing 0.5g of natural stilbite and 0.404g of Fe (NO)3)3·9H2O and 0.04gAgNO3Stirring and dispersing in 10g of deionized water to obtain a mixed solution A;
(2) 0.4851g Bi (NO) were weighed out3)3·5H2Dissolving O in 3.12g of ethylene glycol under stirring to obtain a mixed solution B;
(3) dissolving 1g of urea in 6g of deionized water to obtain a mixed solution C;
(4) slowly adding the mixed liquor A obtained in the step (1) into the mixed liquor B obtained in the step (2), stirring for 1min to obtain mixed liquor D, then slowly adding the mixed liquor C obtained in the step (3) into the mixed liquor D, and stirring for 1min to obtain mixed liquor E;
(5) putting the mixed solution E obtained in the step (4) in a water bath at 95 ℃ to generate a sol, then putting the sol in an oven at 130 ℃ to generate gel, then putting the gel in a 580 ℃ tubular furnace, and calcining the gel for 3 hours in a nitrogen atmosphere to obtain the zeolite-loaded Ag-doped BiFeO3/Bi2Fe4O9A composite material.
Example 2:
(1) weighing 0.75g natural clinoptilolite and 0.303g Fe (NO)3)3·9H2O and 0.015gAgNO3Stirring and dispersing in 9g of deionized water to obtain a mixed solution A;
(2) 0.3638g Bi (NO) were weighed out3)3·5H2Dissolving O in 1.95g of glycol under stirring to obtain a mixed solution B;
(3) dissolving 1.2g of urea in 12g of deionized water to obtain a mixed solution C;
(4) slowly adding the mixed liquor A obtained in the step (1) into the mixed liquor B obtained in the step (2), stirring for 5min to obtain mixed liquor D, then slowly adding the mixed liquor C obtained in the step (3) into the mixed liquor D, and stirring for 5min to obtain mixed liquor E;
(5) putting the mixed solution E obtained in the step (4) in a water bath at 98 ℃ to generate a sol, then putting the sol in an oven at 120 ℃ to generate gel, then putting the gel in a 560 ℃ tubular furnace, and calcining the gel for 2 hours in a nitrogen atmosphere to obtain the zeolite-loaded Ag-doped BiFeO3/Bi2Fe4O9A composite material.
Example 3:
(1) weighing 1.72g natural mordenite, 1.0423g Fe (NO)3)3·9H2O and 0.086gAgNO3Stirring and dispersing in 23g of deionized water to obtain a mixed solution A;
(2) 1.2516g Bi (NO) were weighed out3)3·5H2Dissolving O in 6.88g of ethylene glycol under stirring to obtain a mixed solution B;
(3) dissolving 3.1g of urea in 19g of deionized water to obtain a mixed solution C;
(4) slowly adding the mixed solution A obtained in the step (1) into the mixed solution B obtained in the step (2), stirring for 3min to obtain a mixed solution D, then slowly adding the mixed solution C obtained in the step (3) into the mixed solution D, and stirring for 3min to obtain a mixed solution E;
(5) putting the mixed solution E obtained in the step (4) in a water bath at 98 ℃ to generate a sol, then putting the sol in an oven at 125 ℃ to generate gel, then putting the gel in a tube furnace at 570 ℃, and calcining the gel for 3 hours in a nitrogen atmosphere to obtain the zeolite-loaded Ag-doped BiFeO3/Bi2Fe4O9A composite material.
Performance test experiments:
the photocatalytic performance test of the composite material is carried out in a photochemical reaction instrument (BL-GHX-V), firstly, 50ml of rhodamine B solution with the initial concentration of 10mg/L is added into a quartz reaction tube, and 0.04g of the Ag-doped BiFeO doped zeolite prepared in one of the embodiments 1 to 3 is weighed3/Bi2Fe4O9Adding the composite material into the above 50ml Luomingdan B solutionThen 0.2ml H was added2O2(30 wt%), after dark adsorption for 1h, starting a 500W xenon lamp to simulate natural illumination for 5h, and testing the concentration of the remaining rhodamine B in the solution by using an ultraviolet visible spectrophotometer to calculate the rhodamine B (%). After the reaction was completed, the added composite material was recovered by a permanent magnet, and the detection results are shown in table 1, and the experimental results of calculating the magnetic recovery (%) of the composite material are shown in table 2.
TABLE 1 detection results of the concentration of remaining rhodamine B
| Sample (I) | Example 1 | Example 2 | Example 3 |
| Rhodamine degradation Rate (%) | 0.13 | 0.34 | 0.46 |
TABLE 2 detection and analysis results of samples of examples 1 to 3
| Sample (I) | Example 1 | Example 2 | Example 3 |
| Rhodamine degradation Rate (%) | 98.7 | 96.6 | 95.4 |
| Magnetic recovery (%) | 98.3 | 96.4 | 97.1 |
As can be seen from the results of the degradation rate and the magnetic recovery rate of the rhodamine B of the samples in the embodiments 1 to 3 in the table 2, the degradation rate of the samples in the embodiments 1 to 3 to the rhodamine B under the illumination of a xenon lamp is greater than 95%, the magnetic recovery rate of the composite material after reaction is greater than 96%, and the samples in the embodiments 1 to 3 have excellent visible light catalytic performance and magnetic recovery performance.
Claims (6)
1. Ag-doped BiFeO loaded on zeolite3/Bi2Fe4O9The composite material is characterized in that the zeolite is loaded with Ag and doped with BiFeO3/Bi2Fe4O9The composite material is prepared by the following method:
(1) zeolite, Fe (NO)3)3·9H2O and AgNO3Stirring and dispersing in deionized water to obtain a mixed solution A; the zeolite and Fe (NO)3)3·9H2O、AgNO3The mass ratio of the deionized water to the deionized water is 1: 0.404-0.808: 0.02-0.08: 12-20;
(2) adding Bi (NO)3)3·5H2Stirring and dissolving the O in ethylene glycol to obtain a mixed solution B; said Bi (NO)3)3·5H2The mass ratio of O to glycol is 1: 5.36-6.43;
(3) dissolving urea in deionized water to obtain a mixed solution C; the mass ratio of the urea to the deionized water is 1: 6-10;
(4) slowly adding the mixed solution A obtained in the step (1) into the mixed solution B obtained in the step (2), stirring to obtain a mixed solution D, then slowly adding the mixed solution C obtained in the step (3) into the mixed solution D, and stirring to obtain a mixed solution E; zeolite added to the mixed solution A and Bi (NO) added to the mixed solution B3)3·5H2The mass ratio of the O to the urea added into the mixed liquid C is 1: 0.4851-0.9702: 1.6-2;
(5) placing the mixed solution E obtained in the step (4) at 95-98 ℃ for reaction to obtain a sol product, drying the sol product to obtain gel, placing the gel in a 560-580 ℃ tubular furnace, and calcining in an inert gas atmosphere to obtain the zeolite-loaded Ag-doped BiFeO3/Bi2Fe4O9A composite material.
2. The zeolite-supported Ag-doped BiFeO of claim 13/Bi2Fe4O9A composite material characterized by: in the step (1), the zeolite is natural stilbite, clinoptilolite, mordenite or analcime.
3. The zeolite-supported Ag-doped BiFeO of claim 13/Bi2Fe4O9A composite material characterized by: in the step (5), the drying temperature is 120-130 ℃.
4. The zeolite-supported Ag-doped BiFeO of claim 13/Bi2Fe4O9A composite material characterized by: in the step (5), the inert gas is nitrogen.
5. The zeolite-supported Ag-doped BiFeO of claim 13/Bi2Fe4O9A composite material characterized by: in the step (5), the calcination time is 2-3 h.
6. The zeolite-supported Ag-doped BiFeO of claim 13/Bi2Fe4O9Composite material used as photocatalyst for dye wastewater and Cu-containing wastewater2+Application to photocatalytic purification of wastewater.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711295305.XA CN108114736B (en) | 2017-12-08 | 2017-12-08 | Ag-doped BiFeO loaded on zeolite3/Bi2Fe4O9Composite material and preparation method and application thereof |
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| CN108114736B true CN108114736B (en) | 2020-04-21 |
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