CN108435210B - Cadmium niobate/cadmium sulfide composite photocatalyst and preparation method thereof - Google Patents
Cadmium niobate/cadmium sulfide composite photocatalyst and preparation method thereof Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 49
- 229910052793 cadmium Inorganic materials 0.000 title claims abstract description 47
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 229910052980 cadmium sulfide Inorganic materials 0.000 title claims abstract description 45
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 45
- WUPHOULIZUERAE-UHFFFAOYSA-N 3-(oxolan-2-yl)propanoic acid Chemical compound OC(=O)CCC1CCCO1 WUPHOULIZUERAE-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000010955 niobium Substances 0.000 claims abstract description 20
- 239000002243 precursor Substances 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 8
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000007864 aqueous solution Substances 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 7
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 7
- 239000011593 sulfur Substances 0.000 claims abstract description 7
- -1 sulfur ions Chemical class 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000003960 organic solvent Substances 0.000 claims abstract description 6
- 229910017053 inorganic salt Inorganic materials 0.000 claims abstract description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 6
- YKYOUMDCQGMQQO-UHFFFAOYSA-L cadmium dichloride Chemical compound Cl[Cd]Cl YKYOUMDCQGMQQO-UHFFFAOYSA-L 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000003828 vacuum filtration Methods 0.000 claims description 6
- LVEULQCPJDDSLD-UHFFFAOYSA-L cadmium fluoride Chemical compound F[Cd]F LVEULQCPJDDSLD-UHFFFAOYSA-L 0.000 claims description 4
- XNHGKSMNCCTMFO-UHFFFAOYSA-D niobium(5+);oxalate Chemical compound [Nb+5].[Nb+5].[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O XNHGKSMNCCTMFO-UHFFFAOYSA-D 0.000 claims description 4
- YHBDIEWMOMLKOO-UHFFFAOYSA-I pentachloroniobium Chemical compound Cl[Nb](Cl)(Cl)(Cl)Cl YHBDIEWMOMLKOO-UHFFFAOYSA-I 0.000 claims description 4
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 4
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 4
- UYJXRRSPUVSSMN-UHFFFAOYSA-P ammonium sulfide Chemical compound [NH4+].[NH4+].[S-2] UYJXRRSPUVSSMN-UHFFFAOYSA-P 0.000 claims description 3
- LHQLJMJLROMYRN-UHFFFAOYSA-L cadmium acetate Chemical compound [Cd+2].CC([O-])=O.CC([O-])=O LHQLJMJLROMYRN-UHFFFAOYSA-L 0.000 claims description 3
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 claims description 3
- DPLVEEXVKBWGHE-UHFFFAOYSA-N potassium sulfide Chemical compound [S-2].[K+].[K+] DPLVEEXVKBWGHE-UHFFFAOYSA-N 0.000 claims description 3
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 claims description 3
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 claims description 2
- XIEPJMXMMWZAAV-UHFFFAOYSA-N cadmium nitrate Inorganic materials [Cd+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XIEPJMXMMWZAAV-UHFFFAOYSA-N 0.000 claims description 2
- RMCKOIXJLDOSOT-UHFFFAOYSA-L cadmium(2+);oxalate Chemical compound [Cd+2].[O-]C(=O)C([O-])=O RMCKOIXJLDOSOT-UHFFFAOYSA-L 0.000 claims description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 2
- 229910000484 niobium oxide Inorganic materials 0.000 claims description 2
- AOLPZAHRYHXPLR-UHFFFAOYSA-I pentafluoroniobium Chemical compound F[Nb](F)(F)(F)F AOLPZAHRYHXPLR-UHFFFAOYSA-I 0.000 claims description 2
- NMHMNPHRMNGLLB-UHFFFAOYSA-N phloretic acid Chemical compound OC(=O)CCC1=CC=C(O)C=C1 NMHMNPHRMNGLLB-UHFFFAOYSA-N 0.000 claims description 2
- 230000001699 photocatalysis Effects 0.000 abstract description 18
- 239000000843 powder Substances 0.000 abstract description 11
- 239000002904 solvent Substances 0.000 abstract description 4
- 230000031700 light absorption Effects 0.000 abstract description 3
- 238000005342 ion exchange Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- 239000001257 hydrogen Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000007790 scraping Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000007146 photocatalysis Methods 0.000 description 3
- 229910003334 KNbO3 Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- CFJRGWXELQQLSA-UHFFFAOYSA-N azanylidyneniobium Chemical compound [Nb]#N CFJRGWXELQQLSA-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Inorganic materials O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- 238000005424 photoluminescence Methods 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- 230000015843 photosynthesis, light reaction Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- 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
- B01J27/02—Sulfur, selenium or tellurium; Compounds thereof
- B01J27/04—Sulfides
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a cadmium niobate/cadmium sulfide composite photocatalyst and a preparation method thereof. Firstly, mixing a cadmium source, a niobium source and an organic solvent, drying at 10-100 ℃ under normal pressure, volatilizing the solvent to form powder, then carrying out high-temperature treatment to obtain a precursor of the cadmium niobate/cadmium sulfide composite photocatalyst, and mixing and stirring the precursor in an inorganic salt aqueous solution containing sulfur ions to obtain the cadmium niobate/cadmium sulfide composite photocatalyst. The invention adopts a solvent self-volatilization method to prepare a precursor of the cadmium niobate/cadmium sulfide composite photocatalyst for the first time, and then prepares the composite photocatalyst by an ion exchange method; the obtained composite photocatalyst has a wider light absorption range, and can effectively separate photoproduction electrons from holes, so that the photocatalytic utilization efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of photocatalytic materials, and particularly relates to a cadmium niobate/cadmium sulfide composite photocatalyst and a preparation method thereof.
Background
Since the second half of the twentieth century, fossil energy has been nearly exhausted with the rapid development of industrialization. Meanwhile, due to the overuse of fossil fuels, environmental pollution reaches unprecedented severe degree. The development of new and efficient clean energy has become a major task faced by the scientific and technical world. The photocatalytic technology can decompose water to produce clean hydrogen energy and convert greenhouse gas CO into CO2Reducing the carbon-containing organic matter again, thereby arousing wide research interest at home and abroad. The development of a novel composite photocatalytic material expands the solar energy utilization rate of the material and improves the quantum conversion efficiency of photocatalytic reaction, which is the core of photocatalytic research and is also the bottleneck problem that future practical application of photocatalytic technology must break through.
Many materials are applied to the research of photocatalysis technology for more than forty years of development of photocatalysis technology, and niobate compounds are in a large numberThe photocatalytic material is unique. The niobate has unique crystal structure and physical and chemical properties, and has the advantages of good thermal stability and high photocatalytic activity when being applied to degradation of organic dyes, photocatalytic hydrogen production and oxygen production and the like. Choi reported KNbO3The loaded CdS can effectively improve the photocatalytic hydrogen production activity under the condition that nickel oxide is used as a cocatalyst, and KNbO3Exhibit excellent carrier and promoting effects.
Cadmium niobate is also a material which is always concerned in niobate, and due to the piezoelectric effect and the photoluminescence effect which are peculiar to cadmium niobate, cadmium niobate is often used as piezoelectric materials, ferroelectric materials, microwave dielectric ceramics and the like instead of the traditional lead-containing heavy metal materials, but the research on the application of photocatalysis is less at present.
Disclosure of Invention
The invention aims to provide a cadmium niobate/cadmium sulfide composite photocatalyst and a preparation method thereof. The composite photocatalyst has a wider light absorption range, and the composite rate of photo-generated electrons and holes is low, so that the photocatalytic utilization efficiency can be effectively improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a cadmium niobate/cadmium sulfide composite photocatalyst is prepared by mixing a niobium source and a cadmium source in an organic solvent, performing solvent self-volatilization and high-temperature roasting to form a cadmium niobate/cadmium sulfide composite photocatalyst precursor, and then preparing the cadmium niobate/cadmium sulfide composite photocatalyst by an ion exchange method; the preparation method specifically comprises the following steps:
1) adding a niobium source and a cadmium source into a 10-100mL bottle according to the molar ratio of metal atoms Nb to Cd being 4: 1-1: 4, adding an organic solvent according to the molar weight of Nb being 1-10000 times, mixing and stirring for 1-6 h, and drying at 10-100 ℃ under normal pressure to obtain a mixture;
2) placing the mixture obtained in the step 1) in a muffle furnace, roasting for 1-24h at 100-600 ℃, obtaining white powder in a bottle, and scraping the powder by using a plastic scraper to obtain a cadmium niobate/cadmium sulfide composite photocatalyst precursor;
3) adding the precursor of the cadmium niobate/cadmium sulfide composite photocatalyst obtained in the step 2) into an inorganic salt aqueous solution with the sulfur ion content of 0.01-2mol/L, mixing and stirring for 1-2 h, sequentially performing vacuum filtration, deionized water washing and ethanol washing, and baking for 2-10h at 40-100 ℃ to obtain the cadmium niobate/cadmium sulfide composite photocatalyst.
Wherein the niobium source is one or more of niobium chloride, niobium oxalate, niobium fluoride and niobium oxide.
The cadmium source is one or more of cadmium chloride, cadmium oxalate, cadmium acetate, cadmium nitrate and cadmium fluoride.
The organic solvent is one or more of methanol, ethanol, formaldehyde, acetaldehyde, acetone and benzene.
The inorganic salt is one or more of sodium sulfide, sodium hydrosulfide, potassium sulfide and ammonium sulfide.
Compared with the prior art, the invention has the remarkable advantages that:
(1) the composite photocatalyst obtained by the invention has a wider light absorption range, and can effectively separate photoproduction electrons from holes, thereby obviously improving the photocatalytic utilization efficiency.
(2) The invention adopts the method of solvent self-volatilization to prepare the composite photocatalyst for the first time, has simple operation, can synthesize the composite photocatalyst by one-time heating, and can effectively save energy consumption.
Detailed Description
In order to make the present invention more comprehensible, the technical solutions of the present invention are further described below with reference to specific embodiments, but the present invention is not limited thereto.
Example 1
Adding niobium oxalate and cadmium fluoride into a 25mL bottle according to the molar ratio of metal atoms Nb to Cd being 4:1, adding ethanol according to 100 times of the molar weight of Nb atoms, mixing and stirring for 1h, and drying at 40 ℃ under normal pressure to obtain a mixture; placing the obtained mixture in a muffle furnace, roasting for 4h at 500 ℃, obtaining white powder in a bottle, and scraping the powder by using a plastic scraper to obtain a precursor of the cadmium niobate/cadmium sulfide composite photocatalyst; adding the obtained precursor of the cadmium niobate/cadmium sulfide composite photocatalyst into a sodium sulfide aqueous solution with the sulfur ion content of 0.1mol/L, mixing and stirring for 2 hours, sequentially performing vacuum filtration, deionized water washing and ethanol washing, and baking at 80 ℃ for 6 hours to obtain the cadmium niobate/cadmium sulfide composite photocatalyst.
Example 2
Adding niobium chloride and cadmium fluoride into a 40mL bottle according to the molar ratio of metal atoms Nb to Cd being 3:1, adding propanol according to 300 times of the molar weight of Nb atoms, mixing and stirring for 1h, and drying at 40 ℃ under normal pressure to obtain a mixture; placing the obtained mixture in a muffle furnace, roasting for 6 hours at 300 ℃, obtaining white powder in a bottle, and scraping the powder by using a plastic scraper to obtain a precursor of the cadmium niobate/cadmium sulfide composite photocatalyst; adding the obtained precursor of the cadmium niobate/cadmium sulfide composite photocatalyst into a potassium sulfide aqueous solution with the sulfur ion content of 0.5mol/L, mixing and stirring for 2 hours, sequentially performing vacuum filtration, deionized water washing and ethanol washing, and baking at 70 ℃ for 5 hours to obtain the cadmium niobate/cadmium sulfide composite photocatalyst.
Example 3
Adding niobium oxalate and cadmium acetate into a 25mL bottle according to the molar ratio of metal atoms Nb to Cd being 1:1, adding methanol according to 500 times of the molar weight of Nb atoms, mixing and stirring for 6h, and drying at 50 ℃ under normal pressure to obtain a mixture; placing the obtained mixture in a muffle furnace, roasting for 4h at 500 ℃, obtaining white powder in a bottle, and scraping the powder by using a plastic scraper to obtain a precursor of the cadmium niobate/cadmium sulfide composite photocatalyst; adding the obtained precursor of the cadmium niobate/cadmium sulfide composite photocatalyst into an ammonium sulfide aqueous solution with the sulfur ion content of 1.5mol/L, mixing and stirring for 1.5h, sequentially performing vacuum filtration, deionized water washing and ethanol washing, and baking at 60 ℃ for 8h to obtain the cadmium niobate/cadmium sulfide composite photocatalyst.
Example 4
Adding niobium chloride and cadmium chloride into a 100mL bottle according to the molar ratio of metal atoms Nb to Cd being 1:2, adding acetone according to 200 times of the molar weight of Nb atoms, mixing and stirring for 5h, and drying at 40 ℃ under normal pressure to obtain a mixture; placing the obtained mixture in a muffle furnace, roasting for 8 hours at 400 ℃, obtaining white powder in a bottle, and scraping the powder by using a plastic scraper to obtain a precursor of the cadmium niobate/cadmium sulfide composite photocatalyst; adding the obtained precursor of the cadmium niobate/cadmium sulfide composite photocatalyst into a sodium hydrosulfide aqueous solution with the sulfur ion content of 2mol/L, mixing and stirring for 1h, sequentially performing vacuum filtration, deionized water washing and ethanol washing, and baking at 60 ℃ for 8h to obtain the cadmium niobate/cadmium sulfide composite photocatalyst.
1. Taking 0.1g of the cadmium niobate/cadmium sulfide composite photocatalyst prepared in the above examples 1 to 4, adding the cadmium niobate/cadmium sulfide composite photocatalyst into a solution containing 0.2mol/L of Na2S and Na2SO3In the photocatalytic reactor of the mixed solution, the photocatalytic hydrogen production activity was tested at a rotation speed of 500r/min using natural light as a light source, and the results are shown in table 1.
TABLE 1 catalytic activity of the cadmium niobate/cadmium sulfide composite photocatalyst prepared in the example of the present invention
2. The hydrogen production activity of the cadmium niobate/cadmium sulfide composite photocatalyst prepared in example 3 was compared with that of the existing cadmium sulfide, niobium titanate/cadmium sulfide (the preparation method is described in connection with the preparation of a xiong "CdS pillared titanium niobate mesoporous composite material and the hydrogen production activity by photolysis of water"), niobium nitride/cadmium sulfide (the preparation method is described in connection with CN 105854924a, "a preparation method of a niobium nitride/cadmium sulfide composite nanoparticle photocatalyst"), and niobium pentoxide/cadmium sulfide (the preparation method is described in connection with the preparation of a yuezen "niobium-based composite material and the research on the photocatalytic hydrogen production performance thereof) under the same conditions, and the results are shown in table 2.
TABLE 2 comparison of hydrogen production activities of different catalytic materials
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (5)
1. A preparation method of a cadmium niobate/cadmium sulfide composite photocatalyst is characterized by comprising the following steps: the method comprises the following steps:
1) adding a niobium source and a cadmium source into a bottle according to the molar ratio of metal atoms Nb to Cd being 4: 1-1: 4, adding an organic solvent according to 1-10000 times of the molar weight of Nb atoms, mixing and stirring for 1-6 h, and drying at 10-100 ℃ under normal pressure to obtain a mixture;
2) placing the mixture obtained in the step 1) in a muffle furnace, and roasting for 1-24h at 100-600 ℃ to obtain a precursor of the cadmium niobate/cadmium sulfide composite photocatalyst;
3) adding the cadmium niobate/cadmium sulfide composite photocatalyst precursor obtained in the step 2) into an inorganic salt aqueous solution with the sulfur ion content of 0.01-2mol/L, mixing and stirring for 1-2 h, sequentially performing vacuum filtration, deionized water washing and ethanol washing, and baking at 40-100 ℃ for 2-10h to obtain the cadmium niobate/cadmium sulfide composite photocatalyst;
the organic solvent is one or more of methanol, ethanol, formaldehyde, acetaldehyde, acetone and benzene.
2. The preparation method of the cadmium niobate/cadmium sulfide composite photocatalyst as claimed in claim 1, wherein the preparation method comprises the following steps: the niobium source is one or more of niobium chloride, niobium oxalate, niobium fluoride and niobium oxide.
3. The preparation method of the cadmium niobate/cadmium sulfide composite photocatalyst as claimed in claim 1, wherein the preparation method comprises the following steps: the cadmium source is one or more of cadmium chloride, cadmium oxalate, cadmium acetate, cadmium nitrate and cadmium fluoride.
4. The preparation method of the cadmium niobate/cadmium sulfide composite photocatalyst as claimed in claim 1, wherein the preparation method comprises the following steps: the inorganic salt is one or more of sodium sulfide, sodium hydrosulfide, potassium sulfide and ammonium sulfide.
5. The cadmium niobate/cadmium sulfide composite photocatalyst prepared by the method of claim 1.
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| CN105709793A (en) * | 2016-01-26 | 2016-06-29 | 苏州大学 | Cadmium sulfide nanoparticle modified niobium pentoxide nanorod/nitrogen doped graphene composite photocatalyst and preparation method and application thereof |
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|---|---|
| CN108435210A (en) | 2018-08-24 |
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