CN106512987A - Ismuth tungstate/graphene aerogel compound visible-light-induced photocatalyst and preparation method thereof - Google Patents
Ismuth tungstate/graphene aerogel compound visible-light-induced photocatalyst and preparation method thereof Download PDFInfo
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- CN106512987A CN106512987A CN201611045370.2A CN201611045370A CN106512987A CN 106512987 A CN106512987 A CN 106512987A CN 201611045370 A CN201611045370 A CN 201611045370A CN 106512987 A CN106512987 A CN 106512987A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 70
- PBYZMCDFOULPGH-UHFFFAOYSA-N tungstate Chemical compound [O-][W]([O-])(=O)=O PBYZMCDFOULPGH-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 239000004964 aerogel Substances 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000011941 photocatalyst Substances 0.000 title abstract description 11
- 150000001875 compounds Chemical class 0.000 title abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000006185 dispersion Substances 0.000 claims abstract description 18
- 238000011282 treatment Methods 0.000 claims abstract description 10
- 229910020350 Na2WO4 Inorganic materials 0.000 claims abstract description 8
- 238000000502 dialysis Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims abstract description 8
- 239000000017 hydrogel Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims description 34
- 239000003054 catalyst Substances 0.000 claims description 33
- 229910052797 bismuth Inorganic materials 0.000 claims description 30
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 30
- 239000002351 wastewater Substances 0.000 claims description 10
- 235000011054 acetic acid Nutrition 0.000 claims description 7
- 230000001351 cycling effect Effects 0.000 claims description 7
- 238000004108 freeze drying Methods 0.000 claims description 7
- 229950000845 politef Drugs 0.000 claims description 7
- 230000003252 repetitive effect Effects 0.000 claims description 7
- 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 claims description 7
- 229940043267 rhodamine b Drugs 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 150000001243 acetic acids Chemical class 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract description 15
- 238000001027 hydrothermal synthesis Methods 0.000 abstract description 6
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000006731 degradation reaction Methods 0.000 abstract description 4
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 abstract 4
- 239000007788 liquid Substances 0.000 abstract 2
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000007710 freezing Methods 0.000 abstract 1
- 230000008014 freezing Effects 0.000 abstract 1
- 238000005580 one pot reaction Methods 0.000 abstract 1
- -1 polytetrafluoroethylene Polymers 0.000 abstract 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract 1
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract 1
- XMVONEAAOPAGAO-UHFFFAOYSA-N sodium tungstate Chemical compound [Na+].[Na+].[O-][W]([O-])(=O)=O XMVONEAAOPAGAO-UHFFFAOYSA-N 0.000 abstract 1
- 238000006555 catalytic reaction Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000001699 photocatalysis Effects 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000499 gel Substances 0.000 description 5
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000007146 photocatalysis Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 229910007694 ZnSnO3 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003426 co-catalyst Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- VAOCPAMSLUNLGC-UHFFFAOYSA-N metronidazole Chemical compound CC1=NC=C([N+]([O-])=O)N1CCO VAOCPAMSLUNLGC-UHFFFAOYSA-N 0.000 description 1
- 229960000282 metronidazole Drugs 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 239000002077 nanosphere Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000006862 quantum yield reaction Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000001228 spectrum Methods 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
-
- 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
- C02F2101/38—Organic compounds containing nitrogen
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- Chemical & Material Sciences (AREA)
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Abstract
The invention discloses an ismuth tungstate/graphene aerogel compound visible-light-induced photocatalyst and a preparation method thereof. The method comprises the following steps: preparing graphene oxide from graphite powder serving as a raw material by adopting an improved Hummers method, dispersing in 50mL of an acetic acid aqueous solution to obtain a graphene oxide dispersion liquid having a mass concentration of 2-5mg/mL, and stirring and dissolving 0.1mmol of Bi(NO3)3.2H2O into the graphene oxide dispersion liquid to obtain a solution A; stirring and dissolving 0.1mmol of Na2WO4 in 20mL of water to obtain a transparent clear solution B; slowly pouring the solution B into the solution A, continuing to stir for 10min, transferring into a polytetrafluoroethylene closed reactor, performing a hydrothermal reaction for 3 hours at 180 DEG C, and naturally cooling to room temperature to obtain hydrogel; and performing dialysis treatment, freezing and drying. A one-pot method is adopted to prepare the ismuth tungstate/graphene aerogel compound visible-light-induced photocatalyst which can be easily recycled, the compound visible-light-induced photocatalyst has relatively high degradation efficiency for organic pollutants under natural sunlight irradiation, the preparation process is simple, and the prepared compound visible-light-induced photocatalyst can be recycled.
Description
Technical field
The invention belongs to the synthesis technical field of visible light catalyst, and in particular to a kind of bismuth tungstate/graphene aerogel
Composite visible light catalyst and preparation method thereof.
Background technology
Photocatalysis technology with its environmental protection and energy saving, reaction condition is gentle, sunlight and non-secondary pollution can be utilized the advantages of
Good application prospect is shown in the treatment of waste water, with great potentiality to be exploited.Photocatalyst causes photochemical catalytic oxidation also
The essence of former reaction is to it acts as electron transit mediator, it is crucial that photoproduction e for light-catalyzed reaction course--h+Excite
With migrate two steps.Excite and can be regulated and controled by electronic band structure, i.e., band gap width and position of energy band determine the response light of catalyst
The probability that wavelength and reaction are carried out.Photoproduction e--h+Mobility then determine catalysis activity and quantum yield, it is considered that should
The microscopic surface textures such as process and crystal bulk structure, degree of crystallization, surface area and co-catalyst are closely related.Therefore, build one
The visible light catalytic system of individual efficient stable is in addition to electronic structure to be considered, it is also noted that material category, appearance structure, crystallization
The impact of the property such as degree and surface characteristic.The selection of material is even more important, because it determines that the visible ray of semi-conducting material rings
Answer degree and aggregate efficiency.
In numerous catalysis materials, Bi2WO6It is current most study, and the reasonable one kind of photocatalytic activity is visible
Light type photocatalyst.The Bi from reported firsts such as Kudo in 19992WO6There is under radiation of visible light of the wavelength more than 420nm light
After catalysis activity, Bi2WO6Because of its narrower energy gap（About 2.7eV）, can by excited by visible light and under visible light with compared with
High catalysis activity, so that cause increasing concern as a kind of new visible light catalytic material.Bi2WO6As one
Kind with visible light-responded novel photocatalysis material, it by for photocatalysis removal and degradable organic pollutant open up one it is new
Approach, has very good application prospect in terms of the depollution of environment and new energy development.Therefore, high activity, height are researched and developed
The visible light catalyst of stability and good circulation utility, is the important front edge problem of domestic and international water treatment field.
The content of the invention
Present invention solves the technical problem that it is simple and being capable of the wolframic acid that uses of repetitive cycling to there is provided a kind of synthesis technique
Bismuth/graphene aerogel composite visible light catalyst and preparation method thereof.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that bismuth tungstate/graphene aerogel is combined visible
The preparation method of photocatalyst, it is characterised in that concretely comprise the following steps：
（1）Adopt improved Hummers ' methods graphene oxide to be prepared by raw material of graphite powder, then graphene oxide is dispersed in
The graphene oxide dispersion that mass concentration is 2-5mg/mL is obtained in 50mL aqueous acetic acids, then by 0.1mmol Bi
(NO3)3·2H2O stirring and dissolving obtains solution A in above-mentioned graphene oxide dispersion；
（2）By 0.1mmol Na2WO4Stirring and dissolving obtains transparent settled solution B in 20mL water；
（3）Solution B is poured in solution A, is continued stirring 10min, is proceeded in politef closed reactor in 180 DEG C of hydro-thermals
Reaction 3h, naturally cools to room temperature and obtains hydrogel, and the lyophilization Jing after dialysis treatment obtains block bismuth tungstate/Graphene airsetting
Glue composite visible light catalyst.
Further preferably, in the graphene oxide dispersion, the mass concentration of graphene oxide is 3-4mg/mL, is passed through
Natural sunlight 4h, obtained bismuth tungstate/graphene aerogel composite visible light catalyst is in rhdamine B waste water
The clearance of rhodamine B reaches more than 99%, and the bismuth tungstate after use/graphene aerogel composite visible light catalyst is by squeezing
After the mode of pressure excludes Interstitial Water, repetitive cycling is used.
Bismuth tungstate of the present invention/graphene aerogel composite visible light catalyst, it is characterised in that be by above-mentioned side
What method was prepared.
From in terms of using angle, such as photocatalysis quantum efficiency is low, absorb wave-length coverage finite sum for photocatalyst presence
The problems such as Powder Recovery is difficult, has no small distance between practical application.By taking depollution of environment technology as an example, if by stone
Mertenyl composite aerogel catalysis material is used for the pollutions such as water, air, noise and electromagnetic radiation and processes, especially at waste water
Reason field, it is possible to reference to graphene aerogel efficient absorption and the double dominant of higher carrier mobility, prepare new one
The overall bulk catalysis material of macroscopic view in generation, the drawbacks of recycle difficult so as to solve catalyst, can play Graphene gas again
The fabulous light of gel, the performance such as electrically and thermally.
The present invention prepares the bismuth tungstate/graphene aerogel composite visible light catalysis being easily recycled using one kettle way
Agent, the composite visible light catalyst are higher to the degradation efficiency of organic pollution under natural sunlight, preparation technology letter
Single and obtained composite visible light catalyst being capable of repetitive cycling use.
Description of the drawings
Fig. 1 is the X-ray diffraction spectrogram of bismuth tungstate obtained in embodiment 3/graphene aerogel composite visible light catalyst.
Specific embodiment
By the following examples the above of the present invention is described in further details, but this should not be interpreted as this
The scope for inventing above-mentioned theme is only limitted to below example, and all technologies realized based on the above of the present invention belong to this
Bright scope.
Embodiment 1
Improved Hummers ' methods are adopted to prepare graphene oxide by raw material of graphite powder（S. Y. Dong, J. Y. Sun,
Y. K. Li, C. F. Yu, Y. H. Li, J. H. Sun, ZnSnO3 hollow nanospheres/reduced
graphene oxide nanocomposites as high-performance photocatalysts for
degradation of metronidazole, Appl. Catal. B Environ.144 (2014) 386-393）, then
Graphene oxide is dispersed in 50mL aqueous acetic acids the graphene oxide dispersion for obtaining that mass concentration is 1mg/mL, then
By 0.1mmol Bi (NO3)3·2H2O stirring and dissolving obtains solution A in above-mentioned graphene oxide dispersion；By 0.1mmol
Na2WO4Stirring and dissolving obtains transparent settled solution B in 20mL water；Solution B is poured slowly in solution A, continues stirring
10min, proceeds in politef closed reactor in 180 DEG C of hydro-thermal reactions 3h, naturally cools to room temperature and obtain hydrogel, Jing
After dialysis treatment, lyophilization obtains block bismuth tungstate/graphene aerogel composite visible light catalyst.Through nature sunlight
4h is irradiated, the bismuth tungstate/Graphene composite visible light catalyst to the clearance of rhodamine B in rhdamine B waste water is
86.48%.But the composite visible light catalyst is easily become broken by water impact in Photocatalytic Degradation Process, mechanical stability has
Treat further to improve.
Embodiment 2
Adopt improved Hummers ' methods graphene oxide to be prepared by raw material of graphite powder, then graphene oxide is dispersed in into 50mL
The graphene oxide dispersion that mass concentration is 2mg/mL is obtained in aqueous acetic acid, then by 0.1mmol Bi (NO3)3·
2H2O stirring and dissolving obtains solution A in above-mentioned graphene oxide dispersion；By 0.1mmol Na2WO4Stirring and dissolving is in 20mL water
In obtain transparent settled solution B；Solution B is poured slowly in solution A, is continued stirring 10min, is proceeded to politef closed
In 180 DEG C of hydro-thermal reactions 3h in reactor, naturally cool to room temperature and obtain hydrogel, the lyophilization Jing after dialysis treatment obtains block
Shape bismuth tungstate/graphene aerogel composite visible light catalyst.Through nature sunlight 4h, the bismuth tungstate/Graphene gas
Gel composite visible light catalyst is 97.02% to the clearance of rhodamine B in rhdamine B waste water.But this is compound visible
Photocatalyst can slightly be become broken by water impact in Photocatalytic Degradation Process, and mechanical stability needs further to be improved.
Embodiment 3
Adopt improved Hummers ' methods graphene oxide to be prepared by raw material of graphite powder, then graphene oxide is dispersed in into 50mL
The graphene oxide dispersion that mass concentration is 3mg/mL is obtained in aqueous acetic acid, then by 0.1mmol Bi (NO3)3·
2H2O stirring and dissolving obtains solution A in above-mentioned graphene oxide dispersion；By 0.1mmol Na2WO4Stirring and dissolving is in 20mL water
In obtain transparent settled solution B；Solution B is poured slowly in solution A, is continued stirring 10min, is proceeded to politef closed
In 180 DEG C of hydro-thermal reactions 3h in reactor, naturally cool to room temperature and obtain hydrogel, the lyophilization Jing after dialysis treatment obtains block
Shape bismuth tungstate/graphene aerogel composite visible light catalyst.Through nature sunlight 4h, the bismuth tungstate/Graphene gas
Gel composite visible light catalyst is 99.59% to the clearance of rhodamine B in rhdamine B waste water.The composite visible light is urged
Agent will not be changed by water impact in Photocatalytic Degradation Process, and mechanical stability preferably, and can pass through fashion of extrusion
Exclude Interstitial Water repetitive cycling to use.
Fig. 1 is the X-ray diffraction spectrum of bismuth tungstate obtained in the present embodiment/graphene aerogel composite visible light catalyst
Scheme, as seen from the figure the international standard card base of its characteristic diffraction peak and orthorhombic forms bismuth tungstate（JCPDS 39-0256）It is consistent.
Embodiment 4
Adopt improved Hummers ' methods graphene oxide to be prepared by raw material of graphite powder, then graphene oxide is dispersed in into 50mL
The graphene oxide dispersion that mass concentration is 4mg/mL is obtained in aqueous acetic acid, then by 0.1mmol Bi (NO3)3·
2H2O stirring and dissolving obtains solution A in above-mentioned graphene oxide dispersion；By 0.1mmol Na2WO4Stirring and dissolving is in 20mL water
In obtain transparent settled solution B；Solution B is poured slowly in solution A, is continued stirring 10min, is proceeded to politef closed
In 180 DEG C of hydro-thermal reactions 3h in reactor, naturally cool to room temperature and obtain hydrogel, the lyophilization Jing after dialysis treatment obtains block
Shape bismuth tungstate/graphene aerogel composite visible light catalyst.Through nature sunlight 4h, the bismuth tungstate/Graphene gas
Gel composite visible light catalyst is 99.87% to the clearance of rhodamine B in rhdamine B waste water.The composite visible light is urged
Agent will not be changed by water impact in Photocatalytic Degradation Process, and mechanical stability preferably, and can pass through fashion of extrusion
Exclude Interstitial Water repetitive cycling to use.
Embodiment 5
Adopt improved Hummers ' methods graphene oxide to be prepared by raw material of graphite powder, then graphene oxide is dispersed in into 50mL
The graphene oxide dispersion that mass concentration is 5mg/mL is obtained in aqueous acetic acid, then by 0.1mmol Bi (NO3)3·
2H2O stirring and dissolving obtains solution A in above-mentioned graphene oxide dispersion；By 0.1mmol Na2WO4Stirring and dissolving is in 20mL water
In obtain transparent settled solution B；Solution B is poured slowly in solution A, is continued stirring 10min, is proceeded to politef closed
In 180 DEG C of hydro-thermal reactions 3h in reactor, naturally cool to room temperature and obtain hydrogel, the lyophilization Jing after dialysis treatment obtains block
Shape bismuth tungstate/graphene aerogel composite visible light catalyst.Through nature sunlight 4h, the bismuth tungstate/Graphene gas
Gel composite visible light catalyst is 86.15% to the clearance of rhodamine B in rhdamine B waste water.The composite visible light is urged
Agent will not be changed by water impact in Photocatalytic Degradation Process, and mechanical stability preferably, and can pass through fashion of extrusion
Exclude Interstitial Water repetitive cycling to utilize.
Based on above example, bismuth tungstate/stone prepared by the graphene oxide water solution that mass concentration is 3mg/mL is chosen
Its stability is further studied in the agent of black alkene aeroge sunlight catalytic, circulates degradation experiment through 5 times, and photocatalytic activity is without obvious
Reduce, and overall integrity is good.This show prepare bismuth tungstate/graphene aerogel composite visible light catalyst with compared with
Good natural sunlight catalytic activity, and recycling performance is good, is expected to be used for the process of actual waste water.
Ultimate principle, principal character and the advantage of the present invention is embodiment above describes, the technical staff of the industry should
Understand, the present invention is not restricted to the described embodiments, the original for simply illustrating the present invention described in above-described embodiment and description
Reason, under the scope without departing from the principle of the invention, the present invention also has various changes and modifications, and these changes and improvements each fall within
In the scope of protection of the invention.
Claims (3)
1. the preparation method of bismuth tungstate/graphene aerogel composite visible light catalyst, it is characterised in that concretely comprise the following steps：
（1）Adopt improved Hummers ' methods graphene oxide to be prepared by raw material of graphite powder, then graphene oxide is dispersed in
The graphene oxide dispersion that mass concentration is 2-5mg/mL is obtained in 50mL aqueous acetic acids, then by 0.1mmol Bi
(NO3)3·2H2O stirring and dissolving obtains solution A in above-mentioned graphene oxide dispersion；
（2）By 0.1mmol Na2WO4Stirring and dissolving obtains transparent settled solution B in 20mL water；
（3）Solution B is poured in solution A, is continued stirring 10min, is proceeded in politef closed reactor in 180 DEG C of hydro-thermals
Reaction 3h, naturally cools to room temperature and obtains hydrogel, and the lyophilization Jing after dialysis treatment obtains block bismuth tungstate/Graphene airsetting
Glue composite visible light catalyst.
2. the preparation method of bismuth tungstate according to claim 1/graphene aerogel composite visible light catalyst, its feature
It is：In the graphene oxide dispersion, the mass concentration of graphene oxide is 3-4mg/mL, through nature sunlight
4h, removal of the obtained bismuth tungstate/graphene aerogel composite visible light catalyst to rhodamine B in rhdamine B waste water
Rate reaches more than 99%, between the bismuth tungstate after use/graphene aerogel composite visible light catalyst is excluded by way of extruding
After gap water, repetitive cycling is used.
3. a kind of bismuth tungstate/graphene aerogel composite visible light catalyst, it is characterised in that be by described in claim 1 or 2
Method prepare.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359124A (en) * | 2018-01-29 | 2018-08-03 | 四川大学 | A kind of preparation method of waste textile bismuth tungstate composite aerogel |
| CN108620060A (en) * | 2018-04-26 | 2018-10-09 | 江南大学 | A kind of bismuth molybdate graphene aerogel compound and preparation method thereof |
| CN110180532A (en) * | 2019-05-07 | 2019-08-30 | 重庆工商大学 | A kind of carbon doping bismuth tungstate photocatalyst and preparation method thereof containing oxygen defect |
| CN110237810A (en) * | 2019-05-21 | 2019-09-17 | 河南师范大学 | A kind of preparation method of the bismuth oxychloride of synergistic sorption-photocatalytic degradation terramycin wastewater/graphene three-dimensional aeroge |
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| CN108359124A (en) * | 2018-01-29 | 2018-08-03 | 四川大学 | A kind of preparation method of waste textile bismuth tungstate composite aerogel |
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| CN108620060A (en) * | 2018-04-26 | 2018-10-09 | 江南大学 | A kind of bismuth molybdate graphene aerogel compound and preparation method thereof |
| CN110180532A (en) * | 2019-05-07 | 2019-08-30 | 重庆工商大学 | A kind of carbon doping bismuth tungstate photocatalyst and preparation method thereof containing oxygen defect |
| CN110237810A (en) * | 2019-05-21 | 2019-09-17 | 河南师范大学 | A kind of preparation method of the bismuth oxychloride of synergistic sorption-photocatalytic degradation terramycin wastewater/graphene three-dimensional aeroge |
| WO2021072818A1 (en) * | 2019-10-15 | 2021-04-22 | 中山大学 | Preparation method for and application of bismuth tungstate-graphene-conductive hydrogel |
| CN112473651A (en) * | 2020-11-10 | 2021-03-12 | 中国航发北京航空材料研究院 | Graphene aerogel with photocatalytic activity and preparation method thereof |
| CN112691676A (en) * | 2021-02-01 | 2021-04-23 | 河南师范大学 | Zn-doped alpha-Fe2O3Preparation method of/graphene aerogel composite catalyst, oxidation system and application thereof |
| CN112691676B (en) * | 2021-02-01 | 2024-03-01 | 河南师范大学 | Zn doped alpha-Fe 2 O 3 Preparation method of graphene aerogel composite catalyst, and oxidation system and application thereof |
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