CN107597101A - Simple hydro-thermal method synthesis has visible light-responded photochemical catalyst Bi2WO6/SnO2The preparation method of nanometer sheet - Google Patents
Simple hydro-thermal method synthesis has visible light-responded photochemical catalyst Bi2WO6/SnO2The preparation method of nanometer sheet Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000001027 hydrothermal synthesis Methods 0.000 title claims abstract description 7
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 7
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 6
- 239000000725 suspension Substances 0.000 claims abstract description 39
- XOLBLPGZBRYERU-UHFFFAOYSA-N SnO2 Inorganic materials O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000003756 stirring Methods 0.000 claims abstract description 19
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000004202 carbamide Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 230000015556 catabolic process Effects 0.000 claims abstract description 6
- 238000006731 degradation reaction Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 239000007864 aqueous solution Substances 0.000 claims description 11
- 239000003344 environmental pollutant Substances 0.000 claims description 8
- 231100000719 pollutant Toxicity 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 229910020350 Na2WO4 Inorganic materials 0.000 claims description 6
- 229910021627 Tin(IV) chloride Inorganic materials 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims description 6
- XMVONEAAOPAGAO-UHFFFAOYSA-N sodium tungstate Chemical compound [Na+].[Na+].[O-][W]([O-])(=O)=O XMVONEAAOPAGAO-UHFFFAOYSA-N 0.000 claims description 6
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 claims description 6
- 238000006555 catalytic reaction Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052724 xenon Inorganic materials 0.000 claims description 4
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 206010013786 Dry skin Diseases 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 239000008367 deionised water Substances 0.000 abstract description 9
- 229910021641 deionized water Inorganic materials 0.000 abstract description 9
- 230000001699 photocatalysis Effects 0.000 abstract description 8
- 230000003647 oxidation Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- 239000000243 solution Substances 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 2
- 239000011259 mixed solution Substances 0.000 abstract 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- 239000004065 semiconductor Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000007146 photocatalysis Methods 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000003643 water by type Substances 0.000 description 4
- 238000013019 agitation Methods 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 3
- -1 tungstate compound Chemical class 0.000 description 3
- 230000010718 Oxidation Activity Effects 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005580 one pot reaction Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910001868 water Inorganic materials 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/31—Chromium, molybdenum or tungsten combined with bismuth
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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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
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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
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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
- B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/10—Heat treatment in the presence of water, e.g. steam
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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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
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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
- C02F2101/345—Phenols
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Abstract
Simple hydro-thermal method synthesis has visible light-responded photochemical catalyst Bi2WO6/SnO2The preparation method of nanometer sheet, by using the Bi of hydro-thermal method synthesis2WO6Add in ethylene glycol, stirring to obtain Bi2WO6Suspension.To Bi2WO6SnCl is added in suspension4·5H2O obtains mixing suspension.Urea is added into deionized water simultaneously, the solution obtained is rapidly added mixing suspension, and is stirred at room temperature.Then, mixed solution is transferred to heating response in reactor, the Bi finally obtained2WO6/SnO2Nanometer sheet.Bi prepared by the present invention2WO6/SnO2Nanometer sheet specific surface area is big, and adsorption capacity is strong；With more preferable visible absorption performance, photocatalytic oxidation degradation organic pollution is improved a lot；And Bi of the present invention2WO6/SnO2The preparation method of nanometer sheet is fairly simple, easily operated.
Description
Technical field
The present invention relates to a kind of semiconductor light-catalyst and preparation method for curbing environmental pollution.
Background technology
Energy crisis and environmental problem have been two Tough questions that the mankind have to face, and how effectively to control and control
It is the emphasis in comprehensive environmental improvement to manage pollution of the various chemical pollutants to environment.In recent years, as high-level oxidation technology it
One Photocatalytic Oxidation With Semiconductors technology, just by the widely studied of domestic and foreign scholars, this technology can using solar energy as
The energy effectively utilizes solar energy, reduces the energy resource consumption of people come the pollutant in environment of degrading.
Photocatalytic Oxidation With Semiconductors technology starts from the TiO that Japanese Scientists Fujishima and Honda have found light irradiation2
Single Crystalline Electrodes can be by H2O is decomposed, and utilizes TiO2Semiconductor light-catalyst convert light energy into electric energy and chemical energy just turn into partly lead
The study hotspot of body photocatalysis field.However, Detitanium-ore-type TiO2Energy gap be 3.2eV, its excitation wavelength is
387.5nm, the ultraviolet light range belonged in sunshine.And for solar energy, what its main energetic concentrated on 400~600nm can
See optical range, this considerably reduce TiO2The efficiency of semiconductor light-catalyst, therefore, develop to visible light-responded new
Semi-conducting material is one of key content of Study on photocatalyst.
At present, in numerous semiconductor light-catalysts newly developed, researcher develops tungstate compound, and finding should
Class catalyst has less energy gap, can sufficiently utilize sunshine, is a kind of promising photochemical catalyst.But with
Research is goed deep into, and it is poor that researcher has found that stability occurs in most tungstate compound, the defects of easy photoetch, limits it
Development.
The content of the invention
To make up the deficiencies in the prior art, the present invention provide it is a kind of not only have it is visible light-responded, to organic pollution
With degradation capability and stability is good, uncorruptible photochemical catalyst Bi2WO6/SnO2Nanometer sheet and preparation method.
The present invention is achieved in that hydro-thermal method synthesis has visible light-responded photochemical catalyst Bi2WO6/SnO2Nanometer sheet
Preparation method, comprise the following steps：
S1. pure Bi2WO6With mixing Bi2WO6Sample is synthesized using hydro-thermal method.
By 1mmol Na2WO4·2H2O, 1.98mmol Bi (NO3)3·5H2O is dissolved in 100mL distilled water, stirs 30min,
Obtained flaxen suspension.Suspension is transferred to 90 DEG C of -220 DEG C of reaction 12-36 hours in 100mL autoclaves,
After reaction terminates, natural cooling, filtering, washing, dried 24 hours in 60 DEG C, obtain the pure Bi of product2WO6。
S2.Bi2WO6/SnO2The synthesis of nanometer sheet：
Bi is added into ethylene glycol2WO6, stirring to obtain Bi2WO6Suspension；By Bi2WO6Suspension is added to SnCl4·
5H2Mixing suspension is prepared in O, aqueous solution of urea is prepared, aqueous solution of urea is rapidly added in mixing suspension, and in room temperature
Lower stirring 1 hour, is then transferred into reactor 150-210 DEG C of 12-24 hour of heating, scrubbed, 80 DEG C of dryings 24 hours；Most
Bi is made afterwards2WO6/SnO2Nanometer sheet, wherein Bi2WO6Account for SnO2The 24.47%-88.13% of quality.
The present invention has visible light-responded photochemical catalyst Bi by one pot process2WO6/SnO2Nanometer sheet, pass through simultaneously
Reaction time and reaction temperature are controlled, forms the spherical morphology of bigger serface so that the material of preparation has larger ratio
Surface area, be advantageous to the absorption degradation of pollutant.
Another object of the present invention is that the Bi prepared using the inventive method is claimed2WO6/SnO2Nanometer sheet catalysis drop
The method for solving liguid phase pollutant, is comprised the following steps that：Weigh 100mgBi2WO6/SnO2Nanometer sheet, add 5mg/L 100mL phenol
In solution, the magnetic agitation 30min under dark situation, it is then placed under xenon lamp and irradiates while stirring, carries out catalytic reaction.
The present invention by reasonably regulating and controlling Bi2WO6And SnO2Proportioning, technological parameter is adjusted, nanometer sheet is anti-through solvent heat
It is flake nano level compound Bi that microstructure, which should be obtained,2WO6/SnO2.Compared with prior art, the present invention has advantages below：
1st, Bi prepared by the present invention2WO6/SnO2The specific surface area of nanometer sheet is big, and adsorption capacity is strong；
2nd, Bi prepared by the present invention2WO6/SnO2Nanometer sheet has and preferably may be used compared with traditional photochemical catalyst titanium dioxide
See absorbing properties, photocatalytic oxidation degradation organic pollution is improved a lot；
3rd, Bi provided by the invention2WO6/SnO2The preparation method of nanometer sheet is fairly simple, easily operated, raw suitable for industry
Production.
Brief description of the drawings
Fig. 1 is the Bi in embodiment 12WO6/SnO2The scanning electron microscope (SEM) photograph that 8000 times of nanometer sheet multiplication factor.
Fig. 2 is the Bi in embodiment 1 and embodiment 22WO6/SnO2Nanometer sheet XRD diffracting spectrums.
Fig. 3 is the Bi in embodiment 12WO6/SnO2Nanometer sheet UR-Vis DRS spectrum analysis figures.
Fig. 4 is the Bi of the different content in embodiment 12WO6/SnO2Heterojunction structure light degradation datagram.
Embodiment
The present invention is described in detail below by the drawings and specific embodiments, but not limited the scope of the invention.Such as without special
Illustrate, experimental method of the present invention is conventional method, and experiment equipment used, material, reagent etc. can be chemically public
Department's purchase.It is related to photocatalysis TiO in application examples2, model P25, buy and create industrial group in win.
Embodiment 1
(1) by 1mmol Na2WO4·2H2O, 1.98mmol Bi (NO3)3·5H2O is dissolved in 100mL distilled water, stirring
30min, obtained flaxen suspension, suspension is transferred in 100mL stainless steel autoclaves and is maintained at 180 DEG C 24
Hour.After natural cooling, product filtering, washed repeatedly with deionized water and ethanol, then dried at 60 DEG C and be made within 24 hours pure
Bi2WO6。
(2) 0.7g Bi are added in 50mL ethylene glycol2WO6, stir 3 hours and obtain Bi2WO6Suspension.To Bi2WO6Suspension
Middle addition 0.7g SnCl4·5H2O obtains mixing suspension.0.4g urea is added into 30mL deionized waters, it is water-soluble to obtain urea
Liquid.Aqueous solution of urea is rapidly added in mixing suspension, is stirred at room temperature 1 hour, is then transferred into polytetrafluoroethylene (PTFE)
Lined steel reactor, heated 16 hours in 180 DEG C, collect, repeatedly washed with deionized water, dried in 80 DEG C 24 hours, finally obtain
To 72.12wt%-Bi2WO6/SnO2Nanometer sheet.
Embodiment 2
(1) by 1mmol Na2WO4·2H2O, 1.98mmol Bi (NO3)3·5H2O is dissolved in 100mL distilled water, stirring
30min, obtained flaxen suspension, suspension is transferred in 100mL stainless steel autoclaves and is maintained at 90 DEG C 36
Hour.After natural cooling, product filtering, washed repeatedly with deionized water and ethanol, then dried at 60 DEG C and be made within 24 hours pure
Bi2WO6。
(2) 0.7g Bi are added in 50mL ethylene glycol2WO6, stir 3 hours and obtain Bi2WO6Suspension.To Bi2WO6Suspension
Middle addition 0.86g SnCl4·5H2O obtains mixing suspension.Meanwhile 0.4g urea is added in 30mL deionized waters, obtain urea
The aqueous solution.Aqueous solution of urea is rapidly added in mixing suspension, is stirred at room temperature 1 hour, is then transferred into polytetrafluoroethyl-ne
Alkene inner lining steel reactor, heated 24 hours in 150 DEG C, collect and deionized water is repeatedly washed, it is dry 24 hours in 80 DEG C, finally
Obtain 88.13wt%-Bi2WO6/SnO2Nanometer sheet.
Embodiment 3
(1) by 1mmol Na2WO4·2H2O, 1.98mmol Bi (NO3)3·5H2O is dissolved in 100mL distilled water, stirring
30min, obtained flaxen suspension, suspension is transferred in 100mL stainless steel autoclaves and is maintained at 220 DEG C 12
Hour.After natural cooling, product filtering, washed repeatedly with deionized water and ethanol, then dried at 60 DEG C and be made within 24 hours pure
Bi2WO6。
(2) 0.7g Bi are added in 50mL ethylene glycol2WO6, stir 3 hours and obtain Bi2WO6Suspension.To Bi2WO6Suspension
Middle addition 0.86g SnCl4·5H2O obtains mixing suspension.Meanwhile 0.4g urea is added in 30mL deionized waters, obtain urea
The aqueous solution.Aqueous solution of urea is rapidly added in mixing suspension, is stirred at room temperature 1 hour, is then transferred into polytetrafluoroethyl-ne
Alkene inner lining steel reactor, heated 24 hours in 150 DEG C, collect and deionized water is repeatedly washed, it is dry 24 hours in 80 DEG C, finally
Obtain 88.13wt%-Bi2WO6/SnO2Nanometer sheet.
Embodiment 4
(1) by 1mmol Na2WO4·2H2O, 1.98mmol Bi (NO3)3·5H2O is dissolved in 100mL distilled water, stirring
30min, obtained flaxen suspension, suspension is transferred in 100mL stainless steel autoclaves and is maintained at 90 DEG C 36
Hour.After natural cooling, product filtering, washed repeatedly with deionized water and ethanol, then dried at 60 DEG C and be made within 24 hours pure
Bi2WO6。
(2) 0.7g Bi are added in 50mL ethylene glycol2WO6, stir 3 hours and obtain Bi2WO6Suspension.To Bi2WO6Suspension
Middle addition 0.23g SnCl4·5H2O obtains mixing suspension.Meanwhile 0.4g urea is added in 30mL deionized waters, obtain urea
The aqueous solution.Aqueous solution of urea is rapidly added in mixing suspension, is stirred at room temperature 1 hour, is then transferred into polytetrafluoroethyl-ne
Alkene inner lining steel reactor, heated 24 hours in 150 DEG C, collect and deionized water is repeatedly washed, it is dry 24 hours in 80 DEG C, finally
Obtain 24.47wt%-Bi2WO6/SnO2Nanometer sheet.
Application examples 1
Buy business photocatalysis TiO2, without any processing, it is directly used in light-catalyzed reaction as a comparison.
Bi is prepared by the method in embodiment 12WO6/SnO2Nanometer sheet, take the pure Bi of 100mg2WO6, add 5mg/L 100mL
In phenol solution, the magnetic agitation 30min under dark situation, it is put under xenon lamp and irradiates while stirring afterwards, is taken once per 15min
Sample, the sample of taking-up centrifuges 20min under 2000r/min, then takes out supernatant with liquid-transfering gun, then goes out to survey it in 510nm
Absorbance, and record data.
Experimental result is as shown in figure 4, under visible light conditions, pure Bi2WO6Pyrogentisinic Acid has when nanometer sheet is as catalyst
In general catalytic oxidation activity.
Application examples 2
Buy business photocatalysis TiO2, without any processing, it is directly used in light-catalyzed reaction as a comparison.
72.12%Bi is prepared by the method in embodiment 12WO6/SnO2Nanometer sheet, take 100mg72.12%Bi2WO6/SnO2
Nanometer sheet, add in 5mg/L 100mL phenol solutions, the magnetic agitation 30min under dark situation, be put into xenon lamp afterwards and stir below
Side irradiation is mixed, takes a sample per 15min, the sample of taking-up centrifuges 20min under 2000r/min, then is taken out with liquid-transfering gun
Clear liquid, then go out in 510nm and survey its absorbance, and record data.
Experimental result is as shown in figure 4, under visible light conditions, 72.12%Bi2WO6/SnO2When nanometer sheet is as catalyst,
Under visible light conditions, there is stronger catalytic oxidation activity to liguid phase pollutant.
It is described above, the only preferable embodiment of the invention, but the protection domain of the invention is not
This is confined to, any one skilled in the art is in the technical scope that the invention discloses, according to the present invention
The technical scheme of creation and its inventive concept are subject to equivalent substitution or change, should all cover the invention protection domain it
It is interior.
Claims (4)
1. simple hydro-thermal method synthesis has visible light-responded photochemical catalyst Bi2WO6/SnO2The preparation method of nanometer sheet, its feature
It is, comprises the following steps：
Bi is added into ethylene glycol2WO6, stirring to obtain Bi2WO6Suspension；By Bi2WO6Suspension is added to SnCl4·5H2In O
Mixing suspension is prepared, aqueous solution of urea is prepared, aqueous solution of urea is rapidly added in mixing suspension, and is stirred at room temperature
1 hour, it is then transferred into reactor 150-210 DEG C of 12-24 hour of heating, scrubbed, 80 DEG C of dryings 24 hours；Finally it is made
Bi2WO6/SnO2Nanometer sheet, wherein Bi2WO6Account for SnO2The 24.47%-88.13% of quality.
2. according to the method for claim 1, it is characterised in that Bi2WO6Preparation method be specially：By 1mmol
Na2WO4·2H2O, 1.98mmol Bi (NO3)3·5H2O is dissolved in 100mL distilled water, stirs 30min, obtains suspension, will suspend
Liquid is transferred to 90 DEG C of -220 DEG C of reaction 12-36 hours in 100mL autoclaves, after reaction terminates, natural cooling, filters, washes
Wash, dried 24 hours in 60 DEG C, obtain Bi2WO6。
3. nanometer sheet Bi as claimed in claim 12WO6/SnO2The method of catalytic degradation liguid phase pollutant, it is characterised in that tool
Body step is as follows：Take 100mg samples Bi2WO6/SnO2, add in 5mg/L 100mL liguid phase pollutants, magnetic force stirs under dark situation
30min is mixed, is then placed under xenon lamp and irradiates while stirring, carries out catalytic reaction.
4. according to the method for claim 3, it is characterised in that the liguid phase pollutant is phenol.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711058915.8A CN107597101A (en) | 2017-11-01 | 2017-11-01 | Simple hydro-thermal method synthesis has visible light-responded photochemical catalyst Bi2WO6/SnO2The preparation method of nanometer sheet |
| CN201711358232.4A CN108043390A (en) | 2017-11-01 | 2017-11-01 | Nanometer sheet Bi2WO6/SnO2The method of catalytic degradation liguid phase pollutant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711058915.8A CN107597101A (en) | 2017-11-01 | 2017-11-01 | Simple hydro-thermal method synthesis has visible light-responded photochemical catalyst Bi2WO6/SnO2The preparation method of nanometer sheet |
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| CN109179491A (en) * | 2018-11-09 | 2019-01-11 | 五邑大学 | A kind of fast-growth SnO2The method of nanometer sheet |
| CN109772295A (en) * | 2019-03-11 | 2019-05-21 | 中南大学 | A kind of bismuth tungstate modification antimony-doped stannic oxide composite photoelectric catalysis electrode, preparation method and application |
| CN114392733A (en) * | 2021-11-30 | 2022-04-26 | 盐城工学院 | Method for preparing bismuth oxide composite material with photocatalytic performance |
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| CN114392733A (en) * | 2021-11-30 | 2022-04-26 | 盐城工学院 | Method for preparing bismuth oxide composite material with photocatalytic performance |
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