CN106732698A - A kind of p n heterojunction type visible-light photocatalysts Bi2WO6/Ag3PO4And preparation method thereof - Google Patents
A kind of p n heterojunction type visible-light photocatalysts Bi2WO6/Ag3PO4And preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 14
- 229910000161 silver phosphate Inorganic materials 0.000 claims abstract description 36
- 239000003054 catalyst Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 12
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 150000002500 ions Chemical class 0.000 claims abstract description 8
- 229910052709 silver Inorganic materials 0.000 claims abstract description 8
- 239000004332 silver Substances 0.000 claims abstract description 8
- 238000013019 agitation Methods 0.000 claims description 30
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 11
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 11
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 11
- 239000003643 water by type Substances 0.000 claims description 11
- 238000005406 washing Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 229910020350 Na2WO4 Inorganic materials 0.000 claims description 4
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims description 4
- XMVONEAAOPAGAO-UHFFFAOYSA-N sodium tungstate Chemical compound [Na+].[Na+].[O-][W]([O-])(=O)=O XMVONEAAOPAGAO-UHFFFAOYSA-N 0.000 claims description 3
- 101710134784 Agnoprotein Proteins 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims 13
- 239000011259 mixed solution Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 27
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(I) nitrate Inorganic materials [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 abstract description 15
- 238000005516 engineering process Methods 0.000 abstract description 3
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 abstract description 2
- 229910000397 disodium phosphate Inorganic materials 0.000 abstract description 2
- 238000001027 hydrothermal synthesis Methods 0.000 abstract description 2
- 239000000725 suspension Substances 0.000 abstract description 2
- 230000001699 photocatalysis Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000007146 photocatalysis Methods 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 229910001868 water Inorganic materials 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000002086 nanomaterial Substances 0.000 description 4
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(III) oxide Inorganic materials O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 description 3
- FJOLTQXXWSRAIX-UHFFFAOYSA-K silver phosphate Chemical compound [Ag+].[Ag+].[Ag+].[O-]P([O-])([O-])=O FJOLTQXXWSRAIX-UHFFFAOYSA-K 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 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 2
- 229940043267 rhodamine b Drugs 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910017611 Ag(NH3)2 Inorganic materials 0.000 description 1
- 229910002915 BiVO4 Inorganic materials 0.000 description 1
- 229910005507 FeWO4 Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(II,III) oxide Inorganic materials [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000002073 nanorod Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- 239000007787 solid 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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/186—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
-
- 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
-
- 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
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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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
- C02F2101/34—Organic compounds containing oxygen
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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
- C02F2101/36—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
-
- 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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- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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Abstract
The present invention discloses a kind of p n heterojunction type visible-light photocatalysts Bi2WO6/Ag3PO4And preparation method thereof, belong to environment-friendly new material technology field.Photochemical catalyst Bi2WO6/Ag3PO4By Bi2WO6And Ag3PO4Composition, both mass ratioes are 3~8：1.Its preparation method comprises the following steps：(1) Bi is prepared using hydro-thermal method2WO6Material；(2) by AgNO3Solution is added to the Bi of step (1) preparation2WO6In suspension, NH is subsequently adding4OH, makes Ag+Silver ammino ion is generated completely, is subsequently adding a certain amount of Na2HPO4·12H2O, obtains Bi2WO6/Ag3PO4Material；(3) product that step (2) is prepared is washed, isolated Bi2WO6/Ag3PO4, then dry, grind, it is standby.The present invention can not only suppress Ag3PO4The separative efficiency of photoetch and raising carrier, and because preparation process is simple and convenient, it is reproducible, with preferable commercial applications prospect.
Description
Technical field
The invention belongs to environment-friendly new material technology field, and in particular to a kind of p-n junction hetero-junctions visible light photocatalysis
Agent Bi2WO6/Ag3PO4And preparation method thereof.
Background technology
Silver orthophosphate (Ag3PO4) used as a kind of important semi-conducting material, it can absorb the sunshine less than 530nm, tool
There is stronger oxidability, the extensive concern of researcher is caused in terms of visible ray photocatalytic water and degradation of contaminant.However, phosphorus
Sour ag material is easily decomposed under light illumination, the stability this greatly reduces it in photocatalytic process.Recently, researcher's hair
Now with Ag3PO4For the photochemical catalyst of matrix effectively degradable organic pollutant and can keep good stability, successfully solve
Ag3PO4Disadvantages mentioned above simultaneously can increase substantially its photocatalytic activity.
P-n heterojunction photochemical catalyst is the photochemical catalyst being compounded to form by p-type semiconductor and n-type semiconductor, is a kind of tool
There is the specific function material of good chemical function, light induced electron and hole can be efficiently separated.P-n junction catalysis material can not only
The wave-length coverage of gap semiconductor is widened, and the compound of carrier can be suppressed by internal electric field, drastically increase material
Photocatalysis energy-absorbing, receive significant attention.Prepared using solid reaction process as patent CN201510148053.2 is reported
BiVO4/Bi2O3It is combined micro- film/nanorod p-n junction photochemical catalyst.But many methods are related to high-temperature operation, not only consume energy but also time-consuming.At present, close
In the Bi with p-n heterojunction structure2WO6/Ag3PO4Catalysis material is also without relevant report.The method that this patent is introduced can
The production cost of material is effectively reduced, building-up process is simple, easy to control, reproducible, and effectively increases silver orthophosphate material
Material stability under light illumination, with excellent photo catalytic reduction performance.
The content of the invention
For the photoetch problem of silver orthophosphate, electronics and hole that light excites generation can be suppressed the invention provides a kind of
Compound p-n heterojunction type visible-light photocatalyst Bi2WO6/Ag3PO4, while provide this p-n heterojunction type visible ray light urging
Agent Bi2WO6/Ag3PO4Preparation method.
The present invention is achieved by the following technical programs.
One kind of the present invention prepares p-n heterojunction type visible-light photocatalyst Bi2WO6/Ag3PO4Method, including following step
Suddenly：
A () prepares Bi using hydro-thermal method2WO6Material；
B () is by AgNO3Solution is added to the Bi prepared with step (a)2WO6In suspension, NH is subsequently adding4OH, makes Ag+It is complete
Full generation silver ammino ion, is subsequently adding a certain amount of Na2HPO4·12H2O, obtains Bi2WO6/Ag3PO4Material；
C () is washed the product that step (b) is prepared, isolated Bi2WO6/Ag3PO4, then dry, grind
Mill, it is standby.
Above-mentioned p-n heterojunction type visible-light photocatalyst Bi2WO6/Ag3PO4Preparation method, step (a) includes following step
Suddenly：
(1) by a certain amount of Na2WO4·2H2O is dissolved in deionized water, is made into WO4 2-Ion concentration is 0.05-
0.15mol/L, labeled as solution A；
(2) by a certain amount of Bi (NO3)3·5H2O and 1-5g polyvinylpyrrolidones (PVP) are dissolved in 25mLC2H5OH/
CH3COOH/H2(volume ratio is 1 to O:1:3) Bi, is made3+：WO4 2-Mol ratio be 2：1, magnetic agitation, labeled as solution B；
(3) solution A and solution B mix, and magnetic agitation 10min forms uniform solution, labeled as solution C, will mix molten
Liquid C is transferred in the reactor of 150mL, at 150-200 DEG C, after reaction 6-10h.Washing, after alcohol is washed, is put into 80 DEG C of baking ovens and does
It is dry, obtain Bi2WO6Material.
Above-mentioned p-n heterojunction type visible-light photocatalyst Bi2WO6/Ag3PO4Preparation method, step (b) includes following step
Suddenly：
(1) Bi for preparing a certain amount of step (a)2WO6Material, is added in 40mL deionized waters, magnetic agitation
30min, labeled as solution D；
(2) and then by 40mL, concentration is the AgNO of 0.008-0.03mol/L3Solution, is added in solution D, adds
The NH of 1mol/L4OH, makes Ag+Silver ammino ion is generated completely, and magnetic agitation 20min forms solution E.
(3) finally by the Na of 0.004-0.01mol/L2HPO4·12H2O solution is added dropwise in solution E, magnetic agitation 60min.
Washing, after alcohol is washed, is put into drying in 80 DEG C of baking ovens, obtains Bi2WO6/Ag3PO4P-n heterojunction structure catalysis material.
Above-mentioned p-n heterojunction type visible light catalyst Bi2WO6/Ag3PO4Preparation method in, Bi2WO6And Ag3PO4Matter
Amount is than being 3~8：1.
Chemical equation of the invention：
Na2WO4·2H2O+2Bi(NO3)3·5H2O=Bi2WO6+2NaNO3+4HNO3+10H2O
AgNO3+2NH3·H2O=[Ag (NH3)2]NO3+2H2O
3[Ag(NH3)2]NO3+6Na2HPO4=Ag3PO4+2(NH4)3PO4+3Na3PO4+3NaNO3
Compared with prior art, the beneficial effects of the present invention are：
(1) p-n heterojunction type visible light catalyst Bi of the present invention2WO6/Ag3PO4Preferably overcome Ag3PO4Photoetch
Shortcoming, considerably improve the utilization ratio of sunshine, can effectively suppress the compound of light induced electron and hole, improve it
Separative efficiency, shows excellent visible light photocatalysis performance.
(2) not only preparation process is simple and convenient for the present invention, reproducible, and is adapted to prepare with scale, with preferable business
Industry application prospect；With certain universality, can be used to construct Bi2WO6The p-n heterojunction type composite nano materials of base are with (such as
Cu3P, Bi2O3, FeWO4, Co3O4Etc. n-type semiconductor) solve the easily compound problem of electronics and hole that light excites generation.
Brief description of the drawings
Fig. 1 is the p-n heterojunction type visible light catalyst Bi of preparation in the embodiment of the present invention 12WO6/Ag3PO4Shape appearance figure
(HIT S-4800 types field emission scanning electron microscope (FE-SEM) observation)；
SEM results show：Ag3PO4Nano particle is evenly affixed to Bi2WO6Particle surface.
Fig. 2 is that have p-n heterojunction type visible light catalyst Bi in the embodiment of the present invention 12WO6/Ag3PO4Photocatalysis drop
Solution organic dyestuff rhodamine B (RhB) test chart；
Photocatalysis experimental result shows：Photocatalysis efficiency of the p-n heterojunction structure catalysis material in 120min reaches
75%.
Fig. 3 is p-n heterojunction type visible light catalyst Bi2WO6/Ag3PO4Mechanism of Semiconductor Photocatalytic Degradation figure；
It can be seen that the p-n heterojunction in internal electric field promotes the migration in light induced electron and hole.
Specific embodiment
Below in conjunction with specific embodiment in detail the present invention is described in detail, but the present invention is not limited to following embodiments.
Embodiment 1
(1) by the Na of 0.008mol2WO4It is dissolved in 100mL deionized waters, is made into WO4 2-Ion concentration is 0.08mol/
L, labeled as solution A；
(2) by a certain amount of Bi (NO3)3·5H2O and 1g polyvinylpyrrolidones (PVP) are dissolved in 25mLC2H5OH/
CH3COOH/H2(volume ratio is 1 to O:1:3) Bi, is made3+：WO4 2-Mol ratio be 2：1, magnetic agitation, labeled as solution B；
(3) solution A and solution B mix, and magnetic agitation 10min forms uniform solution, labeled as solution C, will mix molten
Liquid C is transferred in the reactor of 150mL, at 180 DEG C, after reaction 6h.Washing, after alcohol is washed, is put into drying in 80 DEG C of baking ovens, obtains
Bi2WO6Material.
(4) Bi of the above-mentioned preparations of 1.2g is taken2WO6Material, is added in 40mL deionized waters, magnetic agitation 30min, mark
It is solution D；
(5) and then by 40mL, 0.018mol/L AgNO3Solution, is added in solution D, is subsequently adding 1mol/L's
NH4OH, makes Ag+Silver ammino ion is generated completely, and magnetic agitation 20min forms solution E.
(6) finally by the Na of 0.006mol/L2HPO4·12H2O solution is added drop-wise in solution E, magnetic agitation 60min.Water
Wash, after alcohol is washed, be put into drying in 80 DEG C of baking ovens, obtain Bi2WO6/Ag3PO4Composite photocatalyst material.
Embodiment 2
(1) by 0.005mol Na2WO4It is dissolved in 100mL deionized waters, is made into WO4 2-Ion concentration is 0.05mol/L,
Labeled as solution A；
(2) by a certain amount of Bi (NO3)3·5H2O and 1g polyvinylpyrrolidones (PVP) are dissolved in 25mLC2H5OH/
CH3COOH/H2(volume ratio is 1 to O:1:3) Bi, is made3+：WO4 2-Mol ratio be 2：1, magnetic agitation, labeled as solution B；
(3) solution A and solution B mix, and magnetic agitation 10min forms uniform solution, labeled as solution C, will mix molten
Liquid C is transferred in the reactor of 150mL, at 160 DEG C, after reaction 8h.Washing, after alcohol is washed, is put into drying in 80 DEG C of baking ovens, obtains
Bi2WO6Ball shaped nano material.
(4) Bi of the above-mentioned preparations of 0.5g is taken2WO6Material, is added in 40mL deionized waters, magnetic agitation 30min, mark
It is solution D；
(5) and then by 40mL, 0.012mol/L AgNO3Solution, is added in solution D, is subsequently adding 1mol/L's
NH4OH, makes Ag+Silver ammino ion is generated completely, and magnetic agitation 20min forms solution E.
(6) finally by the Na of 0.004mol/L2HPO4·12H2O solution is added drop-wise in solution E, magnetic agitation 60min.Water
Wash, after alcohol is washed, be put into drying in 80 DEG C of baking ovens, obtain Bi2WO6/Ag3PO4Composite photocatalyst material.
Embodiment 3
(1) by the Na of 0.01mol2WO4It is dissolved in 100mL deionized waters, is made into WO4 2-Ion concentration is 0.1mol/L,
Labeled as solution A；
(2) by a certain amount of Bi (NO3)3·5H2O and 3g polyvinylpyrrolidones (PVP) are dissolved in 25mLC2H5OH/
CH3COOH/H2(volume ratio is 1 to O:1:3) Bi, is made3+：WO4 2-Mol ratio be 2：1, magnetic agitation, labeled as solution B；
(3) solution A and solution B mix, and magnetic agitation 10min forms uniform solution, labeled as solution C, will mix molten
Liquid C is transferred in the reactor of 150mL, at 200 DEG C, after reaction 10h.Washing, after alcohol is washed, is put into drying in 80 DEG C of baking ovens, obtains
To Bi2WO6Ball shaped nano material.
(4) Bi of the above-mentioned preparations of 1.5g is taken2WO6Material, is added in 40mL deionized waters, magnetic agitation 30min, mark
It is solution D；
(5) and then by 40mL, 0.018mol/L AgNO3Solution, is added in solution D, is subsequently adding 1mol/L's
NH4OH, makes Ag+Silver ammino ion is generated completely, and magnetic agitation 20min forms solution E.
(6) finally by the Na of 0.006mol/L2HPO4·12H2O solution is added drop-wise in solution E, magnetic agitation 60min.Water
Wash, after alcohol is washed, be put into drying in 80 DEG C of baking ovens, obtain Bi2WO6/Ag3PO4Composite photocatalyst material.
Embodiment 4
(1) by the Na of 0.015mol2WO4It is dissolved in 100mL deionized waters, is made into WO4 2-Ion concentration is 0.15mol/
L, labeled as solution A；
(2) by a certain amount of Bi (NO3)3·5H2O and 5g polyvinylpyrrolidones (PVP) are dissolved in 25mLC2H5OH/
CH3COOH/H2(volume ratio is 1 to O:1:3) Bi, is made3+：WO4 2-Mol ratio be 2：1, magnetic agitation, labeled as solution B；
(3) solution A and solution B mix, and magnetic agitation 10min forms uniform solution, labeled as solution C, will mix molten
Liquid C is transferred in the reactor of 150mL, at 180 DEG C, after reaction 9h.Washing, after alcohol is washed, is put into drying in 80 DEG C of baking ovens, obtains
Bi2WO6Ball shaped nano material.
(4) Bi of the above-mentioned preparations of 2.5g is taken2WO6Material, is added in 40mL deionized waters, magnetic agitation 30min, mark
It is solution D；
(5) and then by 40mL, 0.024mol/L AgNO3Solution, is added in solution D, is subsequently adding 1mol/L's
NH4OH, makes Ag+Silver ammino ion is generated completely, and magnetic agitation 20min forms solution E.
(6) finally by the Na of 0.008mol/L2HPO4·12H2O solution is added drop-wise in solution E, magnetic agitation 60min.Water
Wash, after alcohol is washed, be put into drying in 80 DEG C of baking ovens, obtain Bi2WO6/Ag3PO4Composite photocatalyst material.
Claims (3)
1. a kind of p-n heterojunction type visible-light photocatalyst Bi2WO6/Ag3PO4, it is characterised in that the photochemical catalyst is by Bi2WO6
And Ag3PO4Composition, both mass ratioes are 3~8：1.
2. p-n heterojunction type visible-light photocatalyst Bi as claimed in claim 12WO6/Ag3PO4Preparation method, its feature
It is to comprise the following steps：
(1) by Na2WO4·2H2O is dissolved in 100mL deionized waters, is made into WO4 2-Ion concentration is 0.05-0.15mol/L, mark
It is designated as solution A；
(2) by Bi (NO3)3·5H2O and 1-5g polyvinylpyrrolidones are dissolved in 25mLC2H5OH、CH3COOH and H2The mixing of O is molten
In liquid, make Bi3+：WO4 2-Mol ratio be 2：1, magnetic agitation, labeled as solution B；
(3) solution A and solution B are mixed, magnetic agitation 10min forms uniform solution, labeled as solution C, solution C is turned
Move on in the reactor of 150mL, 6-10h is reacted at 150~200 DEG C；Washing, alcohol are washed afterwards, place into drying in baking oven, are obtained
Bi2WO6；
(4) Bi for preparing step (3)2WO6, it is added in 40mL deionized waters, magnetic agitation 30min, labeled as solution D；So
It is afterwards the AgNO of 0.008-0.03mol/L 40mL, concentration3Solution, is added in solution D, adds the NH of 1mol/L4OH, makes
Ag+Silver ammino ion is generated completely, and magnetic agitation 20min forms solution E；
(5) finally by the Na of 0.004-0.01mol/L2HPO4·12H2O solution is added drop-wise in solution E, magnetic agitation 60min；It
Washing, alcohol are washed afterwards, place into drying in baking oven, obtain target product：Photochemical catalyst Bi2WO6/Ag3PO4。
3. p-n heterojunction type visible-light photocatalyst Bi as claimed in claim 22WO6/Ag3PO4Preparation method, its feature
It is, in the mixed solution of the step (2), C2H5OH、CH3COOH and H2O volume ratios are 1:1:3.
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| CN201611106618.1A CN106732698A (en) | 2016-12-06 | 2016-12-06 | A kind of p n heterojunction type visible-light photocatalysts Bi2WO6/Ag3PO4And preparation method thereof |
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| CN201611106618.1A CN106732698A (en) | 2016-12-06 | 2016-12-06 | A kind of p n heterojunction type visible-light photocatalysts Bi2WO6/Ag3PO4And preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109621993A (en) * | 2019-01-15 | 2019-04-16 | 湖南大学 | Utilize silver orthophosphate/multi-walled carbon nanotube/bismuth tungstate composite photocatalyst material processing antibiotic method |
| CN109621994A (en) * | 2019-01-15 | 2019-04-16 | 湖南大学 | Silver orthophosphate/multi-walled carbon nanotube/bismuth tungstate composite photocatalyst material and preparation method thereof |
| CN112264060A (en) * | 2020-10-22 | 2021-01-26 | 盐城工学院 | Ag3PO4-Bi2WO6Preparation method and application of visible light photocatalyst |
| CN112264013A (en) * | 2020-10-27 | 2021-01-26 | 福建农林大学 | Preparation method of cellulose-based cobalt-oxygen composite silver phosphate photocatalytic heterojunction |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101648139A (en) * | 2009-09-03 | 2010-02-17 | 福州大学 | Novel visible catalyst-silver phosphate and preparation method thereof |
| CN105289673A (en) * | 2015-11-17 | 2016-02-03 | 中国科学院海洋研究所 | Bi2WO6/Ag3PO4 heterojunction composite photocatalyst and preparation method and application thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101648139A (en) * | 2009-09-03 | 2010-02-17 | 福州大学 | Novel visible catalyst-silver phosphate and preparation method thereof |
| CN105289673A (en) * | 2015-11-17 | 2016-02-03 | 中国科学院海洋研究所 | Bi2WO6/Ag3PO4 heterojunction composite photocatalyst and preparation method and application thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109621993A (en) * | 2019-01-15 | 2019-04-16 | 湖南大学 | Utilize silver orthophosphate/multi-walled carbon nanotube/bismuth tungstate composite photocatalyst material processing antibiotic method |
| CN109621994A (en) * | 2019-01-15 | 2019-04-16 | 湖南大学 | Silver orthophosphate/multi-walled carbon nanotube/bismuth tungstate composite photocatalyst material and preparation method thereof |
| CN112264060A (en) * | 2020-10-22 | 2021-01-26 | 盐城工学院 | Ag3PO4-Bi2WO6Preparation method and application of visible light photocatalyst |
| CN112264013A (en) * | 2020-10-27 | 2021-01-26 | 福建农林大学 | Preparation method of cellulose-based cobalt-oxygen composite silver phosphate photocatalytic heterojunction |
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