CN106390986A - Preparation method of bismuth vanadate/strontium titanate composite photocatalyst - Google Patents
Preparation method of bismuth vanadate/strontium titanate composite photocatalyst Download PDFInfo
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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
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- B01J23/22—Vanadium
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/04—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of inorganic compounds, e.g. ammonia
- C01B3/042—Decomposition of water
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- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/02—Processes for making hydrogen or synthesis gas
- C01B2203/0266—Processes for making hydrogen or synthesis gas containing a decomposition step
- C01B2203/0277—Processes for making hydrogen or synthesis gas containing a decomposition step containing a catalytic decomposition step
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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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
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- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
Abstract
The invention discloses preparation of a BiVO4/SrTiO3 composite photocatalyst, and is mainly applied to the technology of photocatalytic hydrogen production from water decomposition. A preparation method of the BiVO4/SrTiO3 composite photocatalyst disclosed by the invention comprises the following steps: stirring BiVO4 and dispersing the BiVO4 in distilled water in an ultrasonic manner, then adding SrTiO3, stirring and processing in an ultrasonic manner; evaporating to dry the mixture in a water bath at a constant temperature of 40-60 DEG C; finally transferring into a muffle furnace, and calcining for 1-2 hours at a temperature of 450-500 DEG C to obtain the BiVO4/SrTiO3 composite photocatalyst. According to the preparation method disclosed by the invention, a hydrogen producing material SrTiO3 serves as a main body, and a heterojunction composite material is formed by compositing the SrTiO3 with the SrTiO3, so as to increase the migration rate of photoinduced electrons on a semiconductor BiVO4 interface, meanwhile the absorption range of the SrTiO3 in solar energy spectrum is widened, and therefore the performance of the SrTiO3 on photocatalytic hydrogen production from water decomposition is improved. Experimental results show that hydrogen production of the photocatalyst can reach 611.6mu mol/g in the process of hydrogen production from water decomposition.
Description
Technical field
The present invention relates to a kind of BiVO4/SrTiO3The preparation method of composite photo-catalyst, is mainly used in photochemical catalyzing
Produce in the technology of hydrogen, belong to technical field of composite materials and clean energy resource field.
Background technology
In order to tackle at present the related request for the energy and environment in the world, the photochemical catalyzing skill based on quasiconductor
Art is widely recognized as by people.The key of this technology is to find activity height, the photocatalyst of good stability.In the last few years,
Researchers create dense research interest to perovskite material, find them not only in scientific circles but also in engineering circles all
Have and be widely applied very much, wherein, with strontium titanates（SrTiO3）The research best suiting people for catalyst requires：Catalysis activity
Higher, cheap, chemical stability is good, physical property（As superconductivity, electrolyte and conductor photocatalysis performance）Excellent
Different etc..But SrTiO3Energy gap only have 3.2eV, the ultraviolet light accounting for sunlight 4% about can only be responded, to solar energy
Utilization rate is relatively low.Therefore, improve SrTiO3Catalysis activity, improve catalyst photo-generated carrier separation efficiency, and promote
Carrier mobility is very important to Adsorption.In order to obtain such photocatalyst, synthesis different-shape
SrTiO3（Nanosphere, nano wire, nanotube, nano-particle etc.）, or be combined with other quasiconductors and construct hetero-junctions and all have
The synthesizing mean of effect.Before with regard to TiO2There is the research data of correlation Deng semiconductor light-catalyst, and it was brilliant to expose activity
Face is all effective synthesizing mean.It is therefore desirable to be able to enough find a kind of suitable quasiconductor and SrTiO3Form hetero-junctions
To improve the performance of photocatalyst.
BiVO4It is a kind of photocatalyst being capable of responding to visible light, energy gap is narrower, chemical stability preferably, is one
Plant effectively alternative semi-conducting material, its preparation method is also quite skillful, but likewise, for this quasiconductor
For, the migration rate of photo-generated carrier is relatively low, and this catalyst can not produce hydrogen in itself.Therefore, we are expectations
To produce hydrogen material SrTiO3For main body, prepare a kind of BiVO4/SrTiO3Composite, both there is BiVO4And SrTiO3Light urge
Change performance, there is the function of photocatalysis Decomposition Aquatic product hydrogen again, apply in clean energy resource field, for replacing Fossil fuel to solve
Energy shortage and problem of environmental pollution.
Content of the invention
It is an object of the invention to provide a kind of BiVO4/SrTiO3The preparation method of composite photo-catalyst.
First, BiVO4/SrTiO3The preparation of composite photo-catalyst
The present invention is to produce hydrogen material SrTiO3For main body, by with SrTiO3It is compounded to form heterojunction composite, to improve light
Raw electronics is in quasiconductor BiVO4Migration rate on interface, widens SrTiO simultaneously3Absorption region in solar spectral, from
And improve strontium titanates SrTiO3Photocatalyst decomposition water H2-producing capacity.Specifically preparation technology is：By BiVO4Stirring, ultrasonic disperse in
In distilled water, add SrTiO3, stirring, ultrasonic, so that the two is sufficiently mixed；Then the water bath with thermostatic control in 40 ~ 60 DEG C is evaporated；?
After transfer in Muffle furnace, in 450 ~ 500 DEG C calcine 1 ~ 2h, obtain final product BiVO4/SrTiO3Composite photo-catalyst.BiVO4/SrTiO3
In composite photo-catalyst, BiVO4Weight/mass percentage composition be 1 ~ 9%.
2nd, BiVO4/SrTiO3The sign of composite photo-catalyst and analysis
1st, X-ray diffraction analysis（XRD）
Fig. 1 is SrTiO, BiVO of preparation4With a series of complex BiVO4/SrTiO3XRD spectrum（Wherein 1% is in complex
BiVO4Weight/mass percentage composition, by that analogy）.From figure 1 it appears that the SrTiO using hydro-thermal method preparation3Sample is monocrystalline
The SrTiO of cube crystalline phase3（Standard card JCPDS 35-0734）.Wherein 2 θ at 32.42 °, 39.9 ° 8,46.48 °, 57.79 °,
Diffraction maximum at 67.73 ° corresponds to respectively（110）,（111）,（200）,（211）With（220）Crystal face.Calculate SrTiO3Lattice
Parameter a=b=c=3.905, consistent with document report.BiVO using sol-gal process preparation4Sample is the monocline of pure phase
The BiVO of crystalline phase4（JCPDS 14-0688）.At 28.95 °, the diffraction maximum at 30.55 ° corresponds to wherein 2 θ respectively（121）With
（040）Crystal face.The position of all complex characteristic diffraction peaks and peak shape are with respect to pure SrTiO3For there is no generation
Change, show BiVO4Compound have no effect on SrTiO3Lattice structure.But with respect to pure BiVO4For, its peak shape exists
Performance in complex is simultaneously inconspicuous, and this is likely due to BiVO4Compositely proportional less, the therefore detection relative difficulty of XRD.
But, with BiVO4Compositely proportional increase, from the beginning of 5%, can substantially detect in complex（121）Crystal face
Characteristic diffraction peak, this illustrates that we successfully synthesize SrTiO3And BiVO4The composite of two kinds of quasiconductors.
2nd, scanning electron microscope analysis（SEM）
Fig. 3 is pucherite, strontium titanates and the complex BiVO of preparation4/SrTiO3Scanning electron microscope (SEM) photograph.（a）It is hydro-thermal legal system
Standby SrTiO3, by many spheroids that uniformly little particles form, there occurs certain agglomeration between spheroid, diameter exists
200nm about.（b）It is the BiVO using sol-gal process preparation4, granule is larger, and diameter is at 1 μm about, but cavernous structure
Clearly.（c）~（g）It is followed successively by 1wt.%, 3 wt.%, 5 wt.%, 7 wt.%, 9wt.% BiVO4/ SrTiO3Composite wood
Material.As can be seen that composite all there occurs certain sintering in roasting process, little particle is closely sticked together and is formed
Larger granule, and with SrTiO3, also some layer structures once in a while in the increase of ratio, such as schemes（d）~（f）, and work as
When compositely proportional reaches 9wt.%, layer structure disappears again, and composite at this moment is made up of unformed nano-particle.
3rd, UV-Vis DRS analysis（DRS）
In order to verify the optical property of prepared catalyst, such as Fig. 2 is the UV-vis DRS abosrption spectrogram of catalyst,
To it is contemplated that similar, BiVO4Can be with responding to visible light, ABSORPTION EDGE is in 520nm；And pure SrTiO3, can only respond and account for
The ultraviolet light of sunlight 4% about, ABSORPTION EDGE is in 380nm；After both are combined, with BiVO4Compositely proportional by
Cumulative big, there is red shift in the ABSORPTION EDGE of complex, ABSORPTION EDGE be distributed in 380-420nm about it means that complex is to light
Absorbability gradually strengthens, and we guess that such change can improve the photocatalytic activity of catalyst.According to formula：ahν=A
(hν-Eg)n/2, it is calculated the energy gap of each sample, as shown in figure 4, BiVO4Energy gap is 2.4eV, this and document report
The data in road is consistent, pure SrTiO3Energy gap be 3.18eV, the data of this and document report is also very nearly the same, Qi Tafu
The energy gap of compound also demonstrates our guess, and its energy gap is distributed in 2.95 ~ 3.1eV.It is known that forbidden band width
Degree narrower, the energy required for photon excitation is just relatively less, and for light induced electron, its transition is easier, this for
The photocatalytic activity of catalyst has vital effect.
4th, photoelectricity current test（PT）
Although BiVO4Itself can responding to visible light, energy gap is less, but hinders it because photo-quantum efficiency is relatively low
The photocatalytic activity of body.It is known that electronics is excited by photon energy, the light induced electron of generation and a hole part are turning
Can occur compound during moving on to catalyst surface and lose activity, referred to as inactivate.Therefore, in order to the light improving catalyst is urged
Change activity, on the one hand, the recombination probability in our light induced electrons to be reduced and hole, on the other hand, also electronics to be accelerated and hole
Migration rate.The transient photocurrents decay occurring immediately under the irradiation of light can be entered to the charge recombination behavior of photo cathode
Row is explained.Fig. 5 is complex BiVO4/SrTiO3Instantaneous photoelectric current under conditions of bias is for 0.6V.Every 10s in ultraviolet light
Irradiation under（λ<420nm）The electric current density of test catalyst, 5wt.% BiVO4/SrTiO3Photoelectric current maximum, turn on light
Moment, a part of light induced electron and hole occurred to be combined in moment, and photoelectric current reduces rapidly at summit, therefore, electric current
Decay is considered light induced electron and hole to compound mark, the accumulation of catalytic inner electronics or catalyst surface
The accumulation in hole is all likely to result in this charge recombination.When closing lamp, the hole of catalyst surface accumulation can be used as wink
Between the electronics that accumulates with catalyst conduction band of photocathode react.But, this phenomenon does not almost detect in Figure 5
Come, therefore, the decay of photoelectric current mainly due to electronics on photo cathode migration velocity poor lead to, die-away time is permissible
By formula D=(It-Is)/(Im-Is) calculate, ImRepresent instantaneously maximum photoelectric current when turning on light, IsRepresent electric current when turning off the light,
ItExpress time is stable photoelectric current during t.Die-away time is calculated by formula lnD=-1, and die-away time is longer, and photoproduction is described
Electronics and hole speed are lower.According to the analysis of similar situation in document, transient photocurrents are higher, and it is higher to stablize photoelectric current, says
The recombination rate in the light induced electron of this catalyst bright and hole is lower.From fig. 5, it can be seen that 5 wt.%BiVO4/SrTiO3Wink
State photoelectric current is maximum, and therefore, we guess, the photocatalytic activity of this complex is best.
5th, specific surface area test（BET）
Fig. 6 is sample (a) SrTiO3, (b)BiVO4, (c)5 wt.% BiVO4/SrTiO3N2Adsorption desorption curve and BJH hole
Footpath scattergram.All samples in 120 DEG C of 1h that deaerate, remove impurity in advance.According to IUPAC criteria for classification, catalysis produced herein
The adsorption desorption curve of agent belongs to the 4th class, the adsorption curve of mesopore or macropore.Comparison diagram（a）With（c）, pure SrTiO3Ratio
Surface area is 17.1cm2/ g, and the specific surface area of complex is 13.2 cm2/ g, this illustrates SrTiO3And BiVO4Compound compare
Success, due to pure BiVO4Specific surface area is less, is 4.7 cm2/ g, as shown in Fig. 2 BiVO4Inherently there is pore structure, but
It is from Fig. 6（b）Such result, BiVO can be obtained4Particle size is larger, and distribution is wider, and therefore, we can push away
Survey, just because of BiVO4Success and SrTiO3It has been compounded in together, just led to the specific surface area of complex to reduce.
6th, photocatalysis performance test
Fig. 7 is SrTiO3And each complex BiVO4/ SrTiO3Hydrogen-producing speed figure.It is known that photocatalytic water to be reached
Produce the purpose of hydrogen, quasiconductor first will possess suitable band structure, and the position of conduction band is than H2Reduction potential more negative, with
The xenon lamp of 500W is light source, loads 5 wt.%Pt as promoter simultaneously, tests each catalyst respectively under ultraviolet light
H2-producing capacity, due to BiVO4Conduction band positions under the reduction potential of hydrogen, therefore itself is not produce hydrogen, such as Fig. 7
Shown, pure SrTiO3Hydrogen-producing speed be 21.2 μm of ol/g, other complex 1wt.% ~ 9wt.% BiVO4/ SrTiO3Product
Hydrogen speed is respectively 261.2,329.5,611.6,518.3,466.5 μm of ol/g, wherein 5wt.% BiVO4/SrTiO3Product hydrogen speed
Rate highest, this is likely due to a small amount of BiVO4With SrTiO3Widen the absorption region in ultraviolet region for the latter, to solar energy
Utilization rate improve, both form the migration rate accelerating light induced electron while hetero-junctions, make light induced electron and hole
Recombination probability substantially reduce, but the BiVO of excess4But also possible as Pair production complex centre to photocatalysis
Activity plays the effect of suppression, therefore, selects suitable compositely proportional to be also most important for the catalysis activity of photocatalyst
's.
, reaction mechanism analysis
As shown in Figure 4, BiVO4And SrTiO3Energy gap be respectively data of report in 2.4eV and 3.18eV, this and document
It is consistent, their corresponding conduction band positions and valence band location also do not change, therefore, according to catalyst each in document
The mechanism that band gap locations deduce complex Photocatalyzed Hydrogen Production is as shown in Figure 8.SrTiO3And BiVO4Broadly fall into quasiconductor, and have
Suitable band structure, theoretically can form hetero-junctions, therefore on the interface of two catalyst, can accelerate light induced electron
Migration rate, under the irradiation of ultraviolet light, electronics is excited to transit to conduction band, simultaneously in valence band produce hydrogen photohole,
Due to SrTiO3Conduction band positions compare BiVO4Position more negative, SrTiO3Electronics on conduction band is easier to turn during migration
Move on to BiVO4Conduction band on, BiVO simultaneously4Hole in valence band can move to from it closer to SrTiO3Valence band on, photoproduction
The migratory direction in electronics and hole is contrary, is so greatly lowered their recombination probability, extends the use longevity of carrier
Life, thus improve the photocatalytic activity of catalyst.
In sum, the present invention is successfully prepared BiVO using infusion process4/SrTiO3Composite photocatalyst material.By right
The sample of preparation has carried out a series of sign such as XRD, DRS, SEM, BET, and the BiVO preparing is described4/SrTiO3Composite is on boundary
Face defines hetero-junctions, improves migration rate on interface for the light induced electron, widens SrTiO simultaneously3In solar energy
Absorption region in spectrum, thus improve strontium titanate visible light catalyst decomposition water H2-producing capacity.Multiple by investigating under ultraviolet light
The H2-producing capacity of compound, finds that this composite has the ability of preferable photodissociation Aquatic product hydrogen, and hydrogen output reaches when 5%
611.6μmol/g.
Brief description
Fig. 1 is pucherite, strontium titanates and the complex BiVO of preparation4/SrTiO3XRD spectrum.
Fig. 2 is the UV-vis DRS abosrption spectrogram of the vanadium catalyst of preparation.
Fig. 3 is pucherite, strontium titanates and the complex BiVO of preparation4/SrTiO3Scanning electron microscope (SEM) photograph.
Fig. 4 is pucherite, strontium titanates and the complex BiVO of preparation4/SrTiO3Energy gap chart.
Fig. 5 is complex BiVO4/SrTiO3Instantaneous photoelectric current under conditions of bias is for 0.6V.
Fig. 6 is SrTiO3(a), BiVO4(b), 5 wt.% BiVO4/ SrTiO3(c)N2Adsorption desorption curve and BJH
Graph of pore diameter distribution.
Fig. 7 is SrTiO3And each complex BiVO4/ SrTiO3Hydrogen-producing speed figure.
Fig. 8 is BiVO4/ SrTiO3The mechanism figure of the Photocatalyzed Hydrogen Production of complex.
Specific embodiment
Below by specific embodiment to BiVO of the present invention4/SrTiO3The preparation of composite photo-catalyst and performance are made further
Explanation.
Embodiment 1
1）BiVO4Preparation
By 2.425g Bi (NO3)3·5H2O adds diluted 25mL 10% (w/w) HNO of band3In solution, magnetic agitation
15 ~ 20min, adds 2.104g monohydrate potassium, continues the white solution that stirring obtains stable homogeneous, is designated as solution A；
By 0.5845g NH4VO3It is dissolved in the distilled water of 90 DEG C of 20mL, be placed in stirring 15min in 80 DEG C of thermostat water baths,
Add 2.104g monohydrate potassium, continuing stirring until obtaining the dark blue solution of stable homogeneous, being designated as solution B；By B liquid
It is slowly added dropwise into A liquid, solution colour is gradually deepened, and is finally rendered as bottle green, is designated as solution C；Adjust the pH of solution C with ammonia
=6.5, it is subsequently placed in continuously stirred in 80 DEG C of thermostat water baths, take out after navy blue gel to be formed and transfer in drying baker
70 DEG C are dried 12h；Finally by after the dark yellow solid being dried to obtain grinding, it is placed in 500 DEG C of calcining 5h in Muffle furnace, that is, obtains
Sample BiVO4.
2）SrTiO3Preparation
Take positive four butyl esters of 10mmol (3.4036g) metatitanic acid to be dissolved in 20mL 25% (V/V) EA (ethanolamine), stir 15 ~ 20min
Obtain flaxen turbid solution；To in solution add 50mL 3mol/L NaOH solution, continue stirring 25min, add containing
10mmol Sr(NO3)2Aqueous solution 10mL, under room temperature stir 30min；Then proceed in 100mL autoclave, 180 DEG C anti-
Answer 24h；Use distilled water and absolute ethanol washing 3 ~ 4 times respectively, be placed in drying baker 70 DEG C and 12h is dried, grind and obtain final product sample
SrTiO3.
3）BiVO4/SrTiO3The preparation of composite photo-catalyst
Accurately weigh 0.005g BiVO4It is added in 30mL distilled water, under room temperature, stir 15min, ultrasonic 15min；Add
0.495g SrTiO3, stir 15min, ultrasonic 15min, be evaporated in 60 DEG C of waters bath with thermostatic control（Take around 3h）, it is then transferred into horse
Not calcine 2h in 500 DEG C in stove, standby BiVO is obtained4/SrTiO3Composite photo-catalyst.BiVO in sample4Weight/mass percentage composition be
1%.This catalyst is used in photocatalysis Decomposition Aquatic product hydrogen technique, and hydrogen output reaches 261.2 μm of ol/g.
Embodiment 2
（1）BiVO4Preparation：With embodiment 1；
（2）SrTiO3Preparation：With embodiment 1；
（3）BiVO4/SrTiO3The preparation of composite photo-catalyst
Accurately weigh 0.015g BiVO4It is added in 30mL distilled water, under room temperature, stir 15min, ultrasonic 15min；Add
0.485g SrTiO3, stir 15min, ultrasonic 15min, be evaporated in 60 DEG C of waters bath with thermostatic control（Take around 3h）, it is then transferred into horse
Not calcine 2h in 500 DEG C in stove, standby BiVO is obtained4/SrTiO3Composite photo-catalyst.BiVO in sample4Weight/mass percentage composition be
3%.This catalyst is used in photocatalysis Decomposition Aquatic product hydrogen technique, and hydrogen output reaches 329.5 μm of ol/g.
Embodiment 3
（1）BiVO4Preparation：With embodiment 1；
（2）SrTiO3Preparation：With embodiment 1；
（3）BiVO4/SrTiO3The preparation of composite photo-catalyst
Accurately weigh 0.025g BiVO4It is added in 30mL distilled water, under room temperature, stir 15min, ultrasonic 15min；Add
0.475g SrTiO3, stir 15min, ultrasonic 15min, be evaporated in 60 DEG C of waters bath with thermostatic control（Take around 3h）, it is then transferred into horse
Not calcine 2h in 500 DEG C in stove, standby BiVO is obtained4/SrTiO3Composite photo-catalyst.BiVO in sample4Weight/mass percentage composition be
5%.This catalyst is used in photocatalysis Decomposition Aquatic product hydrogen technique, and hydrogen output reaches 611.6 μm of ol/g.
Embodiment 4
（1）BiVO4Preparation：With embodiment 1；
（2）SrTiO3Preparation：With embodiment 1；
（3）BiVO4/SrTiO3The preparation of composite photo-catalyst
Accurately weigh 0.035g BiVO4It is added in 30mL distilled water, under room temperature, stir 15min, ultrasonic 15min；Add
0.035g SrTiO3, stir 15min, ultrasonic 15min, be evaporated in 60 DEG C of waters bath with thermostatic control（Take around 3h）, it is then transferred into horse
Not calcine 2h in 500 DEG C in stove, standby BiVO is obtained4/SrTiO3Composite photo-catalyst.BiVO in sample4Weight/mass percentage composition be
7%.This catalyst is used in photocatalysis Decomposition Aquatic product hydrogen technique, and hydrogen output reaches 518.3 μm of ol/g.
Embodiment 5
（1）BiVO4Preparation：With embodiment 1；
（2）SrTiO3Preparation：With embodiment 1；
（3）BiVO4/SrTiO3The preparation of composite photo-catalyst
Accurately weigh 0.045g BiVO4It is added in 30mL distilled water, under room temperature, stir 15min, ultrasonic 15min；Add
0.455g SrTiO3, stir 15min, ultrasonic 15min, be evaporated in 60 DEG C of waters bath with thermostatic control（Take around 3h）, it is then transferred into horse
Not calcine 2h in 500 DEG C in stove, standby BiVO is obtained4/SrTiO3Composite photo-catalyst.BiVO in sample4Weight/mass percentage composition be
9%.This catalyst is used in photocatalysis Decomposition Aquatic product hydrogen technique, and hydrogen output reaches 466.5 μm of ol/g.
Claims (3)
1. a kind of BiVO4/SrTiO3The preparation method of composite photo-catalyst, is by BiVO4Stirring, ultrasonic disperse in distilled water,
Add SrTiO3, stirring, ultrasonic, so that the two is sufficiently mixed；Then the water bath with thermostatic control in 40 ~ 60 DEG C is evaporated；It is finally transferred to
In Muffle furnace, calcine 1 ~ 2h in 450 ~ 500 DEG C, obtain final product BiVO4/SrTiO3Composite photo-catalyst.
2. BiVO as claimed in claim 14/SrTiO3The preparation method of composite photo-catalyst it is characterised in that：BiVO4/SrTiO3
In composite photo-catalyst, BiVO4Weight/mass percentage composition be 1 ~ 9%.
3. BiVO as claimed in claim 14/SrTiO3The preparation method of composite photo-catalyst it is characterised in that：Described stirring, super
The time of sound 10 ~ 20 min respectively.
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| CN109706468A (en) * | 2019-01-25 | 2019-05-03 | 西安电子科技大学 | A kind of pucherite light anode and its preparation method and application of rhodium strontium titanate doping ultrathin nanometer layer covering |
| CN111099557A (en) * | 2018-10-25 | 2020-05-05 | 中国科学院金属研究所 | Method for constructing integrated photocatalytic decomposition water system by utilizing liquid metal current collector |
| CN113713823A (en) * | 2021-09-14 | 2021-11-30 | 蚌埠学院 | CoTiO (cobalt-titanium oxide)3/BiVO4Preparation method and application of composite photocatalyst |
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| CN107442098B (en) * | 2017-09-04 | 2021-05-04 | 山东师范大学 | Strontium titanate catalyst for preparing hydrogen by photolyzing water by adopting visible light and preparation method |
| CN108772080A (en) * | 2018-06-29 | 2018-11-09 | 台州职业技术学院 | A kind of preparation method of the one-dimensional nano line composite photo-catalyst with nano heterojunction |
| CN108772080B (en) * | 2018-06-29 | 2020-12-01 | 台州职业技术学院 | Preparation method of one-dimensional nanowire composite photocatalyst with nano heterojunction |
| CN111099557A (en) * | 2018-10-25 | 2020-05-05 | 中国科学院金属研究所 | Method for constructing integrated photocatalytic decomposition water system by utilizing liquid metal current collector |
| CN111099557B (en) * | 2018-10-25 | 2023-02-21 | 中国科学院金属研究所 | Method for constructing integrated photocatalytic decomposition water system by utilizing liquid metal current collector |
| CN109706468A (en) * | 2019-01-25 | 2019-05-03 | 西安电子科技大学 | A kind of pucherite light anode and its preparation method and application of rhodium strontium titanate doping ultrathin nanometer layer covering |
| CN113713823A (en) * | 2021-09-14 | 2021-11-30 | 蚌埠学院 | CoTiO (cobalt-titanium oxide)3/BiVO4Preparation method and application of composite photocatalyst |
| CN114672844A (en) * | 2022-04-02 | 2022-06-28 | 西安交通大学 | Preparation method and application of composite material |
| CN114672844B (en) * | 2022-04-02 | 2024-04-09 | 西安交通大学 | Preparation method and application of composite material |
| CN114849689A (en) * | 2022-06-08 | 2022-08-05 | 成都理工大学 | Heterojunction type composite photocatalytic material and preparation method thereof |
| CN114849689B (en) * | 2022-06-08 | 2023-10-27 | 成都理工大学 | Heterojunction type composite photocatalytic material and preparation method thereof |
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