CN106745243B - A kind of stable γ-Bi2O3The preparation method of photochemical catalyst - Google Patents
A kind of stable γ-Bi2O3The preparation method of photochemical catalyst Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 239000003054 catalyst Substances 0.000 title claims abstract description 23
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(III) oxide Inorganic materials O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims abstract description 76
- 239000004094 surface-active agent Substances 0.000 claims abstract description 27
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 239000000428 dust Substances 0.000 claims description 6
- 239000003093 cationic surfactant Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000013078 crystal Substances 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 11
- 230000001699 photocatalysis Effects 0.000 abstract description 4
- 238000007146 photocatalysis Methods 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 230000003213 activating effect Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000002441 X-ray diffraction Methods 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 12
- 239000008118 PEG 6000 Substances 0.000 description 10
- 229920002584 Polyethylene Glycol 6000 Polymers 0.000 description 9
- 229910000416 bismuth oxide Inorganic materials 0.000 description 9
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 description 3
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 3
- 229920002538 Polyethylene Glycol 20000 Polymers 0.000 description 3
- 229920003081 Povidone K 30 Polymers 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- HFQQZARZPUDIFP-UHFFFAOYSA-M sodium;2-dodecylbenzenesulfonate Chemical compound [Na+].CCCCCCCCCCCCC1=CC=CC=C1S([O-])(=O)=O HFQQZARZPUDIFP-UHFFFAOYSA-M 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 240000001973 Ficus microcarpa Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical group [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229960000935 dehydrated alcohol Drugs 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 208000007578 phototoxic dermatitis Diseases 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G29/00—Compounds of 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
- 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
- B01J23/18—Arsenic, antimony or 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
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
Abstract
The present invention provides a kind of stable γ-Bi2O3The preparation method of photochemical catalyst, specifically includes: preparing certain density Bi (NO3)3Nitric acid solution；A certain amount of activating agent in surface is sufficiently dissolved into Bi (NO3)3Nitric acid solution in；Certain density strong base solution is placed in 60-90 DEG C of water-bath, heated at constant temperature, then by Bi (NO3)3Nitric acid solution be slowly added dropwise in the strong base solution of heating, and react certain time under the conditions of 60-90 DEG C of water bath with thermostatic control, obtain reaction solution, be cooled to room temperature, obtain γ-Bi by being filtered, washed, drying2O3.Method provided by the present invention is easy to operate, preparation cost is low, and safety is good, practical, and the specific surfactant that is added can effective stable γ-Bi2O3, do not occur during the reaction to α-Bi2O3Transformation, final stable crystal form is in γ-Bi2O3.Obtained product purity is high, stability is good, photocatalysis performance with higher.
Description
Technical field
The invention belongs to the preparations of photochemical catalyst, more particularly to a kind of stable γ-Bi2O3The preparation method of photochemical catalyst.
Background technique
In numerous photochemical catalysts, Bi2O3As a kind of functional semiconductor material, there are many unique physical chemistry
Property: excellent dielectricity；High oxygen mobility；Big energy gap；High refractive index；Significant photoconduction and photic hair
Photosensitiveness etc., and it is widely used in the fields such as chemical industry, medicine and muffle painting.It is generally believed that bismuth oxide has tetra- kinds of crystalline substances of α, β, γ and δ
Type.Wherein α-Bi2O3It is stabilized with monocline at 730 DEG C or less；δ-the Bi of cubic fluorite structure2O3In 730-825 DEG C of model
It is stabilized in enclosing；β-the Bi of tetragonal2O3With the γ-Bi of body-centered cubic structure2O3At 650 DEG C, the following are metastable phase chemical combination
Object.
Due to the Bi of different crystal forms2O3The field of application is different, therefore Bi2O3The control of crystal form is particularly important.γ-
Bi2O3It is a kind of optical activity cubic crystal, there is very high oxygen ionic conductivity, can be used as electrolyte for solid
Oxide fuel cell or lambda sensor.But γ-Bi2O3For high temperature metastable crystalline phase, rarely have document report in cryogenic conditions at present
Under prepare γ-Bi2O3Catalyst, therefore low temperature controllable preparation γ-Bi2O3Catalyst has great importance.Document " Guo
Liu,Shuai Li,Yuanyuan Lu,et al. Controllable synthesis ofα-Bi2O3andγ-
Bi2O3with high photocatalytic activity by α-Bi2O3→γ-Bi2O3→α-
Bi2O3Transformation in a facile precipitation method [J] 2016. " use the precipitation method 75
Under the conditions of DEG C, by Bi (NO3)3·5H2The nitric acid solution that O is made into is added drop-wise in NaOH solution, reaction time 5min-24h,
It reacts as follows: α-Bi can be generated first2O3(5min-10min), then as the extension in reaction time, α-Bi2O3It can be to
γ-Bi2O3Change (30min-4 h), and then generates single crystal form γ-Bi2O3(5h-8h), but with the continuation in reaction time
Increase, γ-Bi2O3It can be to α-Bi2O3Change (10h-12h), and is finally completely transformed into α-Bi2O3(24h).Its reaction mechanism mechanism of reaction
Are as follows: α-Bi2O3→γ-Bi2O3→α-Bi2O3.Although there is γ-Bi in the document2O3It generates, but with the extension of reaction time, and
It cannot stablize in γ-Bi2O3Crystal form, it may occur that α-Bi2O3Transformation.
In conclusion how using more simple method from the perspective of practical application, preparing and stablize γ-Bi2O3
It keeps its higher photocatalysis performance to be of great significance simultaneously, but is rarely reported so far.
Summary of the invention
For this purpose, the present invention is directed to above-mentioned γ-Bi on many experiments basis2O3It can be to α-Bi2O3The problem of transformation, mentions
A kind of stable γ-Bi is supplied2O3The preparation method of photochemical catalyst, to solve problems of the prior art.
Specifically, stable γ-Bi provided by the invention2O3Preparation method, specifically comprise the following steps:
S1: by Bi (NO3)3·5H2O, which is dissolved in dust technology, prepares certain density Bi (NO3)3Nitric acid solution；
S2: weighing a certain amount of surfactant, and the surfactant is sufficiently dissolved into the Bi (NO3)3Nitric acid
In solution；
S3: preparing certain density strong base solution, the strong base solution is placed in 60-90 DEG C of water-bath, heated at constant temperature, so
Afterwards by the Bi (NO3)3Nitric acid solution be slowly added dropwise in the strong base solution, and in 60-90 DEG C of water bath with thermostatic control condition
Lower reaction certain time, obtains reaction solution；
S4: the resulting reaction solution of S3 is cooled to room temperature, and obtains γ-Bi by being filtered, washed, drying2O3。
Preferably, in S1, the concentration of dust technology is 0.8-2mol/L, the Bi (NO3)3The concentration of nitric acid solution be
0.3-2mol/L。
Preferably, the surfactant is neutral surface active agent or cationic surfactant.
It is highly preferred that the surfactant is any one in PEG-6000, PEG-20000, PVP-K30, CTAB
Kind or their combination.
It is highly preferred that in S2, the surfactant and the Bi (NO3)3Nitric acid solution molar ratio be 1-40:
15-100。
Preferably, in S3, the strong base solution is the NaOH solution of 2-10mol/L.
Preferably, in S3, the time of water bath with thermostatic control reaction is 2-24h.
Preferably, in S4, the drying condition are as follows: 30-90 DEG C of drying temperature, drying time 2-24h.
Method provided by the present invention is easy to operate, preparation cost is low, and safety is good, practical, especially by molten
A certain amount of neutral surface active agent or cationic surfactant are added in liquid system, it can effective stable γ-Bi2O3, anti-
It should not occur to α-Bi in the process2O3Transformation, finally make its stable crystal form in γ-Bi2O3.Obtained γ-Bi2O3With production
The advantages that product are with high purity, stable, while there is its higher photocatalysis performance.
Detailed description of the invention
Fig. 1 is the XRD spectra of sample prepared by the embodiment of the present invention 1；
Fig. 2 is the XRD spectra of sample prepared by comparative example 1 of the present invention；
Fig. 3 is the XRD spectra of sample prepared by comparative example 2 of the present invention；
Fig. 4 is the XRD spectra of sample prepared by comparative example 2 of the present invention；
Fig. 5 is the XRD spectra of sample prepared by comparative example 3 of the present invention；
Fig. 6 is the XRD spectra of sample prepared by comparative example 4 of the present invention.
Specific embodiment
In order to enable those skilled in the art to more fully understand, technical solution of the present invention is practiced, below with reference to specific
The invention will be further described for embodiment, but illustrated embodiment is not as a limitation of the invention.
Technical solution of the present invention is specifically illustrated below, it should be noted that institute in following embodiment
It is commercially available medicament, related method, if being existing without specified otherwise if the related reagent used is without specified otherwise
There is method.
Embodiment 1
A kind of stable γ crystal phase bismuth oxide (γ-Bi2O3) photochemical catalyst preparation method, specifically the preparation method comprises the following steps: weighing one
Quantitative Bi (NO3)3·5H2O, by the Bi (NO3)3·5H2O is dissolved in the dust technology of 1mol/L, and being configured to concentration is 0.5mol/
Bi (the NO of L3)3Nitric acid solution；Then a certain amount of Surfactant PEG -6000 is weighed again, by the Surfactant PEG -
6000 are completely dissolved in above-mentioned Bi (NO3)3Nitric acid solution in so that PEG-6000 is in Bi (NO3)3Nitric acid solution in it is dense
Degree is 0.2mol/L；
Configuration concentration is the NaOH solution of 2mol/L, and NaOH solution is put into water-bath and is heated to 75 DEG C, constant temperature；It will be upper
State the Bi (NO added with PEG-60003)3Nitric acid solution is slowly added dropwise in NaOH solution, one under the conditions of 75 DEG C of water bath with thermostatic control
Obtained reaction solution product is cooled to room temperature after stopping reaction, is washed with deionized water and dehydrated alcohol, at 60 DEG C by the section time
Dry 12h is to get γ-Bi2O3Sample.
75 DEG C of isothermal reactions 2h, 10h and sample for 24 hours are taken to carry out XRD test respectively, Fig. 1 is to exist respectively in embodiment 1
2h, 10h and for 24 hours XRD spectra of acquired sample, when 75 DEG C-for 24 hours when, 2 θ=21.4 °, 24.7 °, 27.7 °, 30.4 °,
It is observed at 32.9 °, 41.7 °, 52.5 °, 54.2 °, 55.6 ° and belongs to γ-Bi2O3Characteristic diffraction peak, illustrate in embodiment 1
Reacting the product obtained afterwards for 24 hours is γ-Bi2O3；In addition, free from admixture peak and diffraction maximum is sharp in XRD diffracting spectrum, illustrates to give birth to
γ-the Bi of production2O3Purity and crystallinity it is all higher, also further illustrating Surfactant PEG -6000 can effectively stablize
γ-Bi2O3, do not occur that it to α-Bi2O3Transformation.
Comparative example 1
It is not added with the preparation of surfactant catalysis material under same experimental conditions
According to operating process same as Example 1, difference from Example 1 is, the no added surface of comparative example 1 is living
The step of property agent PEG-6000.
Fig. 2 be respectively in 2h in comparative example 1,10h and for 24 hours acquired by sample XRD spectra, when 75 DEG C-for 24 hours when, in 2 θ
It is observed at=25.8 °, 26.9 °, 27.4 °, 28.0 °, 33.0 °, 33.3 °, 46.4 °, 52.4 °, 54.8 ° and belongs to α-Bi2O3's
Characteristic diffraction peak illustrates that obtained sample is α-Bi in comparative example 12O3.The above results also illustrate in experimentation whether add
Add surfactant to stablizing γ-Bi2O3Have a great impact.
Embodiment 2
A kind of stable γ crystal phase bismuth oxide (γ-Bi2O3) photochemical catalyst preparation method, specific preparation method and embodiment 1
It is identical, it the difference is that only, surfactant used replaces with CTAB, and concentration in the solution is 0.4mol/L, is made
Bismuth oxide (γ-the Bi of the stable γ crystal phase2O3) photochemical catalyst.
Fig. 3 be respectively in 2h in embodiment 2,10h and for 24 hours acquired by sample XRD spectra, when 75 DEG C-for 24 hours when, in 2 θ
It is observed at=21.4 °, 24.7 °, 27.7 °, 30.4 °, 32.9 °, 41.7 °, 52.5 °, 54.2 °, 55.6 ° and belongs to γ-Bi2O3's
Characteristic diffraction peak illustrates in embodiment 2 in the product that obtains afterwards for 24 hours of reaction to be γ-Bi2O3；In addition, without miscellaneous in XRD diffracting spectrum
Mass peak and diffraction maximum is sharp, illustrates γ-Bi produced2O3Purity and crystallinity it is all higher.Further illustrate surface-active
Agent CTAB can effective stable γ-Bi2O3, do not occur that it to α-Bi2O3Transformation.
Comparative example 2
It adds surfactant SDBS and stablizes γ-Bi2O3The preparation of catalysis material
According to the identical operating process of embodiment 2, difference from Example 2 is that comparative example 2 changes surfactant
For SDBS, concentration in the solution is 0.4mol/L.Fig. 4 be in comparative example 2 respectively in 2h, 10h and for 24 hours acquired by sample
XRD spectra, when 75 DEG C-for 24 hours when, observe and belong at 2 θ=27.5 °, 30.2 °, 32.7 °, 45.1 °, 52.1 °, 55.4 °
γ-Bi2O3Characteristic diffraction peak, 2 θ=24.5 °, 24.7 °, 25.7 °, 26.9 °, 27.4 °, 28.0 °, 33.0 °, 33.3 °,
It is observed at 46.4 °, 52.4 °, 54.8 ° and belongs to α-Bi2O3Characteristic diffraction peak, illustrate sample produced be γ-Bi2O3With
α-Bi2O3Mixed phase, also further illustrating surfactant SDBS cannot effective stable γ-Bi2O3, it may occur that α-
Bi2O3Transformation.
Embodiment 3
A kind of stable γ crystal phase bismuth oxide (γ-Bi2O3) photochemical catalyst preparation method, preparation method is referring to embodiment
1, the difference is that surfactant used replaces with PEG-20000, concentration in the solution is 0.1mol/L.By Fig. 5
It can be seen that 3 gained sample of embodiment XRD spectra, 75 DEG C-for 24 hours in, when 2 θ=21.4 °, 24.7 °, 27.7 °, 30.4 °,
It is observed at 32.9 °, 41.7 °, 52.5 °, 54.2 °, 55.6 ° and belongs to γ-Bi2O3Characteristic diffraction peak, illustrate in embodiment 6
Reacting the product obtained afterwards for 24 hours is γ-Bi2O3；In addition, free from admixture peak and diffraction maximum is sharp in XRD diffracting spectrum, illustrates to give birth to
γ-the Bi of production2O3Purity and crystallinity it is all higher.Also further illustrating Surfactant PEG -20000 can effectively stablize
γ-Bi2O3, do not occur that it to α-Bi2O3Transformation.
Embodiment 4
A kind of stable γ crystal phase bismuth oxide (γ-Bi2O3) photochemical catalyst preparation method, preparation method is referring to embodiment
1, the difference is that surfactant used replaces with PVP-K30, concentration in the solution is 0.04 mol/L.By Fig. 6
It can be seen that 4 gained sample of embodiment XRD spectra, 75 DEG C-for 24 hours in, when 2 θ=21.4 °, 24.7 °, 27.7 °, 30.4 °,
It is observed at 32.9 °, 41.7 °, 52.5 °, 54.2 °, 55.6 ° and belongs to γ-Bi2O3Characteristic diffraction peak, illustrate in embodiment 4
Reacting the product obtained afterwards for 24 hours is γ-Bi2O3；In addition, free from admixture peak and diffraction maximum is sharp in XRD diffracting spectrum, illustrates to give birth to
γ-the Bi of production2O3Purity and crystallinity it is all higher.Also further illustrating surfactant PVP-K30 can effectively stablize
γ-Bi2O3, do not occur that it to α-Bi2O3Transformation.
Embodiment 5
A kind of stable γ crystal phase bismuth oxide (γ-Bi2O3) photochemical catalyst preparation method, preparation method is referring to embodiment
1, the difference is that by Bi (NO3)3The concentration of nitric acid solution be changed to 0.25mol/L.It is obtained after for 24 hours with this condition
Sample is similarly γ-Bi2O3.Illustrate that Surfactant PEG -6000 can effective stable γ-Bi2O3, do not occur that it to α-
Bi2O3Transformation.
Embodiment 6
A kind of stable γ crystal phase bismuth oxide (γ-Bi2O3) photochemical catalyst preparation method, preparation method is referring to embodiment
1, the difference is that the concentration of NaOH solution is changed to 4mol/L.The sample obtained after for 24 hours with this condition is similarly γ-
Bi2O3.Illustrate that Surfactant PEG -6000 can effective stable γ-Bi2O3, do not occur that it to α-Bi2O3Transformation.
Embodiment 7
A kind of stable γ crystal phase bismuth oxide (γ-Bi2O3) photochemical catalyst preparation method, preparation method is referring to embodiment
1, the difference is that bath temperature is changed to 85 DEG C.The sample obtained after for 24 hours with this condition is similarly γ-Bi2O3.It says
Bright Surfactant PEG -6000 can effective stable γ-Bi2O3, do not occur that it to α-Bi2O3Transformation.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, and protection scope is unlimited
In this.Those skilled in the art's made equivalent substitute or transformation on the basis of the present invention, in protection of the invention
Within the scope of, protection scope of the present invention is subject to claims.
Claims (6)
1. a kind of stable γ-Bi2O3The preparation method of photochemical catalyst, which is characterized in that specifically comprise the following steps:
S1: by Bi (NO3)3·5H2O, which is dissolved in dust technology, prepares certain density Bi (NO3)3Nitric acid solution；
S2: weighing a certain amount of cationicsurfactants, and the surfactant is sufficiently dissolved into the Bi (NO3)3
Nitric acid solution in；
S3: preparing certain density strong base solution, the strong base solution is placed in 60-90 DEG C of water-bath, heated at constant temperature, then will
Bi (the NO3)3Nitric acid solution be slowly dropped in the strong base solution, and react one under the conditions of 60-90 DEG C of water bath with thermostatic control
It fixes time, obtains reaction solution；
S4: the resulting reaction solution of S3 is cooled to room temperature, and obtains γ-Bi by being filtered, washed, drying2O3。
2. stable γ-Bi according to claim 12O3The preparation method of photochemical catalyst, which is characterized in that in S1, dust technology
The dust technology for being 0.8-2mol/L for concentration, the Bi (NO3)3Nitric acid solution concentration be 0.3-2mol/L.
3. stable γ-Bi according to claim 22O3The preparation method of photochemical catalyst, which is characterized in that in S2, the sun
Ionic surface active agent and the Bi (NO3)3Nitric acid solution molar ratio be 1-40:15-100.
4. stable γ-Bi according to claim 12O3The preparation method of photochemical catalyst, which is characterized in that described strong in S3
Aqueous slkali is the NaOH solution of 2-10mol/L.
5. stable γ-Bi according to claim 12O3The preparation method of photochemical catalyst, which is characterized in that in S3, thermostatted water
The time of bath reaction is 2-24h.
6. stable γ-Bi according to claim 12O3The preparation method of photochemical catalyst, which is characterized in that in S4, the baking
Dry condition are as follows: 30-90 DEG C of drying temperature, drying time 2-24h.
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| CN102491417A (en) * | 2011-11-30 | 2012-06-13 | 江苏技术师范学院 | Method for preparing ball-flower-shaped gamma-bismuth trioxide powder |
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| CN104741108A (en) * | 2015-04-01 | 2015-07-01 | 辽宁石油化工大学 | Low-temperature preparation method for gamma crystalline phase bismuth oxide (gamma-Bi2O3) photocatalyst |
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2017
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491417A (en) * | 2011-11-30 | 2012-06-13 | 江苏技术师范学院 | Method for preparing ball-flower-shaped gamma-bismuth trioxide powder |
| CN104492465A (en) * | 2014-11-27 | 2015-04-08 | 青岛科技大学 | BiOCl photocatalyst with cotton-shaped structure and preparation method thereof |
| CN104741108A (en) * | 2015-04-01 | 2015-07-01 | 辽宁石油化工大学 | Low-temperature preparation method for gamma crystalline phase bismuth oxide (gamma-Bi2O3) photocatalyst |
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