CN107961788A - Nanometer sheet Zn2SnO4/Bi2WO6The method of catalytic degradation vapor phase contaminants - Google Patents
Nanometer sheet Zn2SnO4/Bi2WO6The method of catalytic degradation vapor phase contaminants Download PDFInfo
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- 229910003107 Zn2SnO4 Inorganic materials 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000000356 contaminant Substances 0.000 title claims abstract description 9
- 239000012808 vapor phase Substances 0.000 title claims abstract description 9
- 230000015556 catabolic process Effects 0.000 title claims abstract description 8
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 8
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 229910020350 Na2WO4 Inorganic materials 0.000 claims abstract description 5
- XMVONEAAOPAGAO-UHFFFAOYSA-N sodium tungstate Chemical compound [Na+].[Na+].[O-][W]([O-])(=O)=O XMVONEAAOPAGAO-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 33
- 239000013049 sediment Substances 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 125000000896 monocarboxylic acid group Chemical group 0.000 claims description 6
- 229910052724 xenon Inorganic materials 0.000 claims description 6
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 6
- 229910021627 Tin(IV) chloride Inorganic materials 0.000 claims description 5
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 claims description 5
- 238000006555 catalytic reaction Methods 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims description 3
- 229910052797 bismuth Inorganic materials 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 239000011261 inert gas Substances 0.000 claims 1
- 238000003756 stirring Methods 0.000 abstract description 15
- 239000011259 mixed solution Substances 0.000 abstract description 6
- 230000001699 photocatalysis Effects 0.000 abstract description 6
- 230000003647 oxidation Effects 0.000 abstract description 4
- 238000007254 oxidation reaction Methods 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 230000002045 lasting effect Effects 0.000 abstract description 3
- 238000001179 sorption measurement Methods 0.000 abstract description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 11
- 239000003054 catalyst Substances 0.000 description 9
- 239000003643 water by type Substances 0.000 description 7
- 235000019441 ethanol Nutrition 0.000 description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 5
- 239000000908 ammonium hydroxide Substances 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 239000011592 zinc chloride Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000013019 agitation Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000007146 photocatalysis Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 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
- 230000004044 response Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000010718 Oxidation Activity Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 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
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000002135 nanosheet Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
- B01J23/30—Tungsten
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
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- 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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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
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Abstract
This divisional application is related to nanometer sheet Zn2SnO4/Bi2WO6The method of catalytic degradation vapor phase contaminants, this method first prepare Zn2SnO4Powder, by Zn2SnO4Powder is dissolved in Bi (NO3)3·5H2O and Na2WO4·2H2In O mixed solutions, lasting stirring, after being ultrasonically treated, centrifuged, be dry, obtaining Zn2SnO4/Bi2WO6Nanometer sheet.Zn prepared by the present invention2SnO4/Bi2WO6Nanometer sheet specific surface area is big, and adsorption capacity is strong；With more preferable visible absorption performance, improve a lot to photocatalytic oxidation degradation organic pollution；And Zn of the present invention2SnO4/Bi2WO6The preparation method of nanometer sheet is fairly simple, easily operated.
Description
The application is Application No. 2017110574364, the applying date is on November 1st, 2017, entitled " one kind is closed
Into with visible light-responded photochemical catalyst Zn2SnO4/Bi2WO6The divisional application of the preparation method of nanometer sheet ".
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, is just being subject to that domestic and foreign scholars' is widely studied, this technology can using solar energy as
The energy effectively utilizes solar energy, reduces the energy consumption of people come the pollutant in environment of degrading.
Bi2WO6As a kind of novel visible photochemical catalyst, energy gap 2.7eV, because being urged with preferable visible ray
Changing performance becomes the hot spot studied in recent years.However, the Bi of single-phase2WO6In addition to low quantum efficiency, also because pair can
See not high (the about λ of light utilization efficiency<450nm), its application in terms of photocatalysis is limited.In order to strengthen Bi2WO6Photocatalytic
Can, nonmetallic or metal ion mixing becomes the common method for improving its photocatalysis performance.However, doping would generally be in semiconductor
Inside cause lattice defect as the trap of capture light induced electron, cause part light induced electron to reach catalyst surface, most
Make the degree that catalytic efficiency improves very limited eventually.
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 Zn2SnO4/Bi2WO6Nanometer sheet and preparation method.
The present invention is achieved in that synthesis has visible light-responded photochemical catalyst Zn2SnO4/Bi2WO6Nanometer sheet
Preparation method, includes the following steps：
S1. it is 2 by molar ratio:1 ZnCl2And SnCl4·5H2O is dissolved in ethanol water, is added dropwise while stirring
Enter NaOH solution, lasting stirring, obtained suspension is moved into reaction kettle, is placed at 150-250 DEG C and heats 12-36h, obtain
To sediment I, sediment I is cleaned, is placed at 60 DEG C and is dried, obtains Zn2SnO4Powder；
S2. by Bi (NO3)3·5H2O is dissolved in CH3In COOH aqueous solutions, solution a is obtained；By Na2WO4·2H2O is dissolved in
In deionized water, solution b, Bi (NO are obtained3)3·5H2O and Na2WO4·2H2O molar ratios are 2:1；At ambient temperature, will be molten
Liquid b is added dropwise in solution a, stirs, mixed solution pH value is adjusted to 7 with ammonium hydroxide；S1 is obtained into Zn2SnO4Powder is added to mixed
Close in solution, Zn2SnO4Account for Bi (NO3)3·5H21~5mol% of O, is ultrasonically treated after lasting stirring, then moves to reaction
In kettle, 11-33h is reacted at 150-250 DEG C, is cooled to room temperature, obtained sediment II, sediment II is cleaned and at 60 DEG C
Lower drying, obtains Zn2SnO4/Bi2WO6Nanometer sheet.
Preferably, inner liner of reaction kettle is polytetrafluoroethylene (PTFE).
The present invention has visible light-responded photochemical catalyst Zn by synthesis2SnO4/Bi2WO6Nanometer sheet, while pass through control
Reaction time processed and reaction temperature, form the spherical morphology of bigger serface so that the material of preparation has larger ratio table
Area, is conducive to the absorption degradation of pollutant.
Another object of the present invention is that the Zn prepared using the method for the present invention is claimed2SnO4/Bi2WO6Nanometer sheet is catalyzed
The method of degraded liguid phase pollutant, comprises the following steps that：By Zn2SnO4/Bi2WO6Nanometer sheet is put into reactor, by indifferent gas
Body is passed through reactor with 20~100mL/min of flow velocity and purges to stabilization, and vapor phase contaminants are passed through reaction with 1~10 μ L/h of flow velocity
Inlet, outlet is closed after 10~60min of device, keeps reactor sealing, reactor is placed in dark-state makes vapor phase contaminants exist
Zn2SnO4/Bi2WO6Nanometer sheet solid state surface adsorbs 0.5~3h, is then turned on xenon lamp and carries out light-catalyzed reaction, is closed after 4~6h
Xenon lamp.The vapor phase contaminants include benzene, toluene, ethylbenzene or acetone.
The present invention's passes through rational Zn2SnO4And Bi2WO6Proportioning, modulation process parameter are anti-through solvent heat by nanometer sheet
The microstructure that should be obtained is flake nano level compound Zn2SnO4/Bi2WO6.Compared with prior art, the present invention has following
Advantage：
1st, Zn prepared by the present invention2SnO4/Bi2WO6The specific surface area of nanometer sheet is big, and adsorption capacity is strong；
2nd, Zn prepared by the present invention2SnO4/Bi2WO6Nanometer sheet has more preferable compared with single-phase photochemical catalyst tungstates
Visible absorption performance, improve a lot to photocatalytic oxidation degradation organic pollution；
3rd, Zn provided by the invention2SnO4/Bi2WO6The preparation method of nanometer sheet is fairly simple, easily operated, suitable for industry
Production.
Brief description of the drawings
Fig. 1 is the Zn in embodiment 12SnO4/Bi2WO6The scanning electron microscope (SEM) photograph that 100000 times of nanometer sheet amplification factor.
Fig. 2 is the Zn in embodiment 1 and embodiment 22SnO4/Bi2WO6Nanometer sheet UV-Vis DRS figure.
Fig. 3 is the Zn in embodiment 12SnO4/Bi2WO6Nanometer sheet different ratio and Zn2SnO4、Bi2WO6Photocatalytic degradation third
Ketone degraded comparison diagram.
Embodiment
The present invention is described in detail below by the drawings and specific embodiments, but is 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.Photocatalysis TiO is arrived involved in application examples2, model P25, buys and creates industrial group in win.
Embodiment 1
(1) by 2.5mmol ZnCl2With 1.25mmol SnCl4·5H2O is dissolved in 20mL deionized waters and 20mL ethanol
In mixed liquor, 10mL 1.0M NaOH solutions are added dropwise thereto under agitation, continues stir about 15min, will obtain
Suspension be moved into 100mL reaction kettles, be placed at 200 DEG C and heat 24h, obtain sediment I, sediment I is used into water respectively
After ethanol cleaning three times, it is placed at 60 DEG C and is dried, obtain Zn2SnO4Powder.
(2) Zn is prepared2SnO4/Bi2WO6Nanometer sheet, its synthesis step are as follows：By 3.92gBi (NO3)3·5H2O is dissolved in
30mL 5.0M CH3In COOH aqueous solutions, solution a is obtained；1.33gNa2WO4·2H2O is dissolved in 48mL deionized waters, is obtained
Solution b；At ambient temperature, solution b is added dropwise in solution a, and after stirring 60min, pH value is adjusted to 7 with ammonium hydroxide, will
0.0846gZn2SnO4Powder is added to above-mentioned solution, and after persistently stirring 30min, ultrasonic 30min, then moves to mixed solution
In 120mL reaction kettles, react 22h at 200 DEG C, be cooled to room temperature, obtain sediment II, by sediment II with deionized water and
Absolute ethyl alcohol cleans repeatedly, and dry at 60 DEG C, obtains 3%Zn2SnO4/Bi2WO6Nanometer sheet, Zn2SnO4Account for Bi2WO6Quality
3wt%.Zn can be clearly showed that from Fig. 12SnO4It is carried on Bi2WO6Nanometer sheet.
Embodiment 2
By 3.92g Bi (NO3)3·5H2O is dissolved in 30mL 5.0M CH3In COOH aqueous solutions, solution a is obtained；
1.33gNa2WO4·2H2O is dissolved in 48mL deionized waters, obtains solution b；At ambient temperature, solution is added dropwise in solution b
In a, after stirring 60min, pH value is adjusted to 7 with ammonium hydroxide, then moves to mixed solution in 120mL reaction kettles, it is anti-at 200 DEG C
22h is answered, is cooled to room temperature, sediment is obtained, sediment is cleaned repeatedly with deionized water and absolute ethyl alcohol, and is done at 60 DEG C
It is dry that pure Bi is made2WO6Nanosheet photocatalyst.
The Zn from Fig. 2 as can be seen that in 320-500nm visible-ranges2SnO4/Bi2WO6Nanometer sheet and pure Bi2WO6Receive
Rice piece has visible ray response, Zn2SnO4There are response, and Zn in ultraviolet light range2SnO4/Bi2WO6Nanometer sheet relative to
Pure Zn2SnO4With pure Bi2WO6Nanometer sheet generates certain red shift, and explanation can utilize more visible rays.
Embodiment 3
(1) by 2.5mmol ZnCl2With 1.25mmol SnCl4·5H2O is dissolved in 20mL deionized waters and 20mL ethanol
In mixed liquor, 10mL 1.0M NaOH solutions are added dropwise thereto under agitation, continues stir about 15min, will obtain
Suspension be moved into 100mL reaction kettles, be placed at 150 DEG C and heat 36h, obtain sediment I, sediment I is used into water respectively
After ethanol cleaning three times, it is placed at 60 DEG C and is dried, obtain Zn2SnO4Powder.
(2) Zn is prepared2SnO4/Bi2WO6Nanometer sheet, its synthesis step are as follows：By 3.92gBi (NO3)3·5H2O is dissolved in
30mL 5.0M CH3In COOH aqueous solutions, solution a is obtained；1.33gNa2WO4·2H2O is dissolved in 48mL deionized waters, is obtained
Solution b；At ambient temperature, solution b is added dropwise in solution a, and after stirring 60min, pH value is adjusted to 7 with ammonium hydroxide, will
0.141gZn2SnO4Powder is added to above-mentioned solution, and after persistently stirring 30min, ultrasonic 30min, then moves to mixed solution
In 120mL reaction kettles, react 33h at 150 DEG C, be cooled to room temperature, obtain sediment II, by sediment II with deionized water and
Absolute ethyl alcohol cleans repeatedly, and dry at 60 DEG C, obtains 5%Zn2SnO4/Bi2WO6Nanometer sheet.Zn2SnO4Account for Bi2WO6Quality
5wt%.
Embodiment 4
(1) by 2.5mmol ZnCl2With 1.25mmol SnCl4·5H2O is dissolved in 20mL deionized waters and 20mL ethanol
In mixed liquor, 10mL 1.0M NaOH solutions are added dropwise thereto under agitation, continues stir about 15min, will obtain
Suspension be moved into 100mL reaction kettles, be placed at 250 DEG C and heat 12h, obtain sediment I, sediment I is used into water respectively
After ethanol cleaning three times, it is placed at 60 DEG C and is dried, obtain Zn2SnO4Powder.
(2) Zn is prepared2SnO4/Bi2WO6Nanometer sheet, its synthesis step are as follows：By 3.92gBi (NO3)3·5H2O is dissolved in
30mL 5.0M CH3In COOH aqueous solutions, solution a is obtained；1.33gNa2WO4·2H2O is dissolved in 48mL deionized waters, is obtained
Solution b；At ambient temperature, solution b is added dropwise in solution a, and after stirring 60min, pH value is adjusted to 7 with ammonium hydroxide, will
0.0.0282gZn2SnO4Powder is added to above-mentioned solution, and after persistently stirring 30min, ultrasonic 30min, then moves mixed solution
To 120mL reaction kettles, 11h is reacted at 250 DEG C, is cooled to room temperature, obtained sediment II, sediment II is used into deionized water
Cleaned repeatedly with absolute ethyl alcohol, and it is dry at 60 DEG C, obtain 1%Zn2SnO4/Bi2WO6Nanometer sheet.Zn2SnO4Account for Bi2WO6Matter
The 1wt% of amount.
Application examples 1
Zn is prepared by the method in embodiment 12SnO4/Bi2WO6Nanometer sheet, by 0.2g 3%Zn2SnO4/Bi2WO6Nanometer sheet
20~60 mesh are ground in agate mortar, by Zn after grinding2SnO4/Bi2WO6Nanometer sheet is laid in reactor.It is with flow velocity
The nitrogen purge of 70mL/min, removes the impurity in reactor, is in and stablizes to reactor, using air as carrier gas
Acetone is passed into reactor, and flow velocity is 2 μ L/h, and it is 30min to be passed through the time, closes inlet, outlet after 30min, keeps anti-
Device is answered to seal, reactor is placed in dark-state makes the acetone of gas phase in Zn2SnO4/Bi2WO6Nanometer sheet solid state surface adsorbs 1h, opens
Xenon lamp carries out light-catalyzed reaction, closes xenon lamp after 30min samples 1 μ L, 4h in gas outlet in reaction process, acetone concentration is used
Agilent 7890A gas Chromatographic Determinations.
Experimental result as shown in Figure 3, under visible light conditions, 3%Zn2SnO4/Bi2WO6When nanometer sheet is as catalyst,
To degrade by 3h, the highest removal rate of acetone is 95.5%, therefore, and under visible light conditions, Zn2SnO4/Bi2WO6Nanometer sheet pair
Vapor phase contaminants have stronger catalytic oxidation activity.
The above, is only the 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 solution 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 (1)
1. nanometer sheet Zn2SnO4/Bi2WO6The method of catalytic degradation vapor phase contaminants, it is characterised in that include the following steps：Will
Zn2SnO4/Bi2WO6Nanometer sheet is put into reactor, and being first passed through reactor with inert gas purges to stabilization, by vapor phase contaminants
It is passed through with 1~10 μ L/h of flow velocity after 10~60min of reactor and keeps reactor sealing, reactor is placed in 0.5~3h of dark-state, so
Xenon lamp is opened afterwards and carries out light-catalyzed reaction, and xenon lamp is closed after 4~6h；
The nanometer sheet Zn2SnO4/Bi2WO6Preparation method be：
S1. ZnCl is used2And SnCl4·5H2O prepares Zn2SnO4Powder；
S2. by Bi (NO3)3·5H2O is dissolved in CH3In COOH aqueous solutions, solution a is obtained；By Na2WO4·2H2O be dissolved in from
In sub- water, solution b, Bi (NO are obtained3)3·5H2O and Na2WO4·2H2O molar ratios are 2:1；
S3. at room temperature, solution b is added in solution a, be mixed, pH value is adjusted to 7；By Zn2SnO4Powder is added to mixing
In solution, Zn2SnO4Account for Bi (NO3)3·5H21~5mol% of O, then moves in reaction kettle and reacts 11- at 150-250 DEG C
33h, cooling obtain sediment II, and sediment II is cleaned, is dry, obtains Zn2SnO4/Bi2WO6Nanometer sheet.
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