CN105170137B - A kind of Bi with cubic structure2WO6The preparation method of photochemical catalyst - Google Patents
A kind of Bi with cubic structure2WO6The preparation method of photochemical catalyst Download PDFInfo
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- CN105170137B CN105170137B CN201510298204.2A CN201510298204A CN105170137B CN 105170137 B CN105170137 B CN 105170137B CN 201510298204 A CN201510298204 A CN 201510298204A CN 105170137 B CN105170137 B CN 105170137B
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- bismuth nitrate
- photochemical catalyst
- wolframic acid
- sodium tungstate
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Abstract
The invention discloses a kind of Bi with cubic structure2WO6The preparation method of photochemical catalyst, comprises the following steps：（1）Bismuth nitrate and sodium tungstate are configured to aqueous bismuth nitrate solution and wolframic acid sodium water solution with deionized water respectively, L lysines are added in wolframic acid sodium water solution under conditions of stirring are formed mixed solution；（2）Aqueous bismuth nitrate solution is added to step（1）In the mixed solution for obtaining and it is well mixed, then is 0.5 3 with the pH value that nitric acid adjusts reaction system, is kept for 5 30 minutes in 140 180 DEG C during the mixed solution of gained then is moved into microwave hydrothermal reaction kettle；（3）Reaction obtains the Bi with cubic structure and high catalytic activity after terminating after cooling down, being centrifuged, wash, dry2WO6Photochemical catalyst.Preparation method of the invention is simple, and reaction rate is fast, and yield is high and easily controllable.
Description
Technical field
The invention belongs to Bi2WO6The synthesis technical field of photochemical catalyst, and in particular to a kind of with cubic structure
Bi2WO6The preparation method of photochemical catalyst.
Background technology
With the environmental pollution for increasingly aggravating, turn into most active in recent years using photocatalysis technology Environment control problem
One of research field.The degraded of photocatalysis technology environmental pollution has that energy consumption is low, purification condition gentle and non-secondary pollution etc.
Advantage and attention.In numerous conductor photocatalysis materials, as a kind of new catalysis material Bi2WO6Because its compared with
Narrow energy gap (about 2.7eV), can by excited by visible light and under visible light have catalysis activity higher and higher have
Machine thing degradation capability and cause increasing concern.Therefore, Bi2WO6The research of catalysis material will for photocatalysis removal and
Degradable organic pollutant opens up a new approach, has very important practical valency in terms of the depollution of environment and new energy development
Value.
It is well known that the performance of photochemical catalyst is connected each other with its structure, pattern and crystallinity, therefore searching one kind has
It is particularly important that the preparation method of special construction and the excellent bismuth tungstate photocatalyst of photocatalysis performance becomes.Biomimetic synthesis technology is
With large biological molecule or biological organic matter self-assembly as template, nucleation and growth to inorganic matter are adjusted, and then synthesize
Go out the nano-functional material with diverse microcosmic appearance.In numerous biological template agent, 1B has nontoxic and good
Biocompatibility the advantages of, be a kind of very wide template of application prospect.
The content of the invention
Present invention solves the technical problem that there is provided, one kind is simple to operate, reaction rate is fast, yield is higher and crystal shape
The controllable Bi with cubic structure of looks2WO6The preparation method of photochemical catalyst.
The present invention is to solve above-mentioned technical problem to adopt the following technical scheme that, a kind of Bi with cubic structure2WO6Light is urged
The preparation method of agent, it is characterised in that comprise the following steps：（1）With bismuth nitrate (Bi (NO3)3·5H2O), sodium tungstate
(Na2WO4·2H2O), 1B and deionized water are raw material, and bismuth nitrate and sodium tungstate are configured into nitre with deionized water respectively
The sour bismuth aqueous solution and wolframic acid sodium water solution, form during 1B to be then added to wolframic acid sodium water solution under conditions of stirring
Mixed solution, wherein 1B are 0.5-2 with the mol ratio of sodium tungstate:1；（2）It is under conditions of stirring, bismuth nitrate is water-soluble
Liquid is added to step（1）In the mixed solution for obtaining and it is well mixed, wherein bismuth nitrate and the mol ratio of sodium tungstate is 2:1, then
The pH value that reaction system is adjusted with nitric acid is 0.5-3, then by the mixed solution of gained move in microwave hydrothermal reaction kettle in
140-180 DEG C is kept for 5-30 minutes；（3）Reaction terminate after through cooling, centrifugation, washing, dry after obtain with cubic structure and
The Bi of high catalytic activity2WO6Photochemical catalyst.
Further limit, step（1）Sodium tungstate and bismuth nitrate in described wolframic acid sodium water solution and aqueous bismuth nitrate solution
Molar concentration is respectively 0.1-0.3mol/L.
The present invention has following remarkable advantage compared with prior art：1st, prepared Bi2WO6The pattern of photochemical catalyst is
Cubic structure, with good crystallinity and good photocatalytic activity；2nd, Morphological control agent is nontoxic and with good life
Thing compatibility；3rd, preparation method is simple, and reaction rate is fast, and yield is high and easily controllable.
Brief description of the drawings
Fig. 1 is Bi obtained in the embodiment of the present invention 22WO6The scanning electron microscope (SEM) photograph of photochemical catalyst, Fig. 2 irradiates for the xenon lamp of 300W
Under, bismuth tungstate obtained in the embodiment of the present invention 2（Bi2WO6- 1B）Photochemical catalyst and 1B is not used to prepare wolframic acid
Bismuth（Bi2WO6）To rhodamine B degraded correlation curve（Operating condition：Catalytic amount：0.5g/L；The concentration of rhodamine B：50mg/
L）.
Specific embodiment
The above of the invention is described in further details by the following examples, but this should not be interpreted as this
The scope for inventing above-mentioned theme is only limitted to following embodiment, and all technologies realized based on the above of the present invention belong to this hair
Bright scope.
Embodiment 1
（1）It is the wolframic acid sodium water solution 20mL of 0.1mol/L to prepare molar concentration, under agitation relies 0.18g L-
Propylhomoserin is added to the well mixed nitric acid for obtaining mixed solution, then preparing that molar concentration is 0.1mol/L in wolframic acid sodium water solution
Bismuth aqueous solution 40mL；
（2）Aqueous bismuth nitrate solution is added dropwise in mixed solution under conditions of stirring, reactant is adjusted with nitric acid
The pH value of system is 0.5, then the mixed solution of gained is transferred in microwave hydrothermal reaction kettle and is kept for 30 minutes in 140 DEG C；
（3）Reaction terminate after through cooling, centrifugation, washing, dry after obtain with cube structure and high catalytic activity
Bi2WO6Photochemical catalyst.
Embodiment 2
（1）It is the wolframic acid sodium water solution 20mL of 0.2mol/L to prepare molar concentration, under agitation relies 0.72g L-
Propylhomoserin is added to the well mixed nitric acid for obtaining mixed solution, then preparing that molar concentration is 0.2mol/L in wolframic acid sodium water solution
Bismuth aqueous solution 40mL；
（2）Aqueous bismuth nitrate solution is added dropwise in mixed solution under conditions of stirring, reactant is adjusted with nitric acid
The pH value of system is 1.0, then the mixed solution of gained is transferred in microwave hydrothermal reaction kettle and is kept for 20 minutes in 160 DEG C；
（3）Reaction terminate after through cooling, centrifugation, washing, dry after obtain with cube structure and high catalytic activity
Bi2WO6Photochemical catalyst.
Fig. 1 is Bi obtained in the present embodiment2WO6The scanning electron microscope (SEM) photograph of photochemical catalyst, as seen from the figure, obtained Bi2WO6Light
Catalyst has cube structure.Fig. 2 is bismuth tungstate obtained in the present embodiment（Bi2WO6- 1B）Photochemical catalyst and do not make
Bismuth tungstate is prepared with 1B（Bi2WO6）To rhodamine B degraded correlation curve, as seen from the figure, wolframic acid obtained in the present embodiment
Bismuth（Bi2WO6- 1B）Photochemical catalyst has photocatalytic activity higher.
Embodiment 3
（1）It is the wolframic acid sodium water solution 20mL of 0.3mol/L to prepare molar concentration, under agitation relies 2.16g L-
Propylhomoserin is added to the well mixed nitric acid for obtaining mixed solution, then preparing that molar concentration is 0.3mol/L in wolframic acid sodium water solution
Bismuth aqueous solution 40mL；
（2）Aqueous bismuth nitrate solution is added dropwise in mixed solution under conditions of stirring, reactant is adjusted with nitric acid
The pH value of system is 3.0, then the mixed solution of gained is transferred in microwave hydrothermal reaction kettle and is kept for 5 minutes in 180 DEG C；
（3）Reaction terminate after through cooling, centrifugation, washing, dry after obtain with cube structure and high catalytic activity
Bi2WO6Photochemical catalyst.
Embodiment above describes general principle of the invention, principal character and advantage, the technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, simply original of the invention is illustrated described in above-described embodiment and specification
Reason, under the scope for not departing from the principle of the invention, various changes and modifications of the present invention are possible, and these changes and improvements each fall within
In the scope of protection of the invention.
Claims (1)
1. a kind of Bi with cubic structure2WO6The preparation method of photochemical catalyst, it is characterised in that comprise the following steps：（1）With
Bismuth nitrate, sodium tungstate, 1B and deionized water are raw material, and bismuth nitrate and sodium tungstate are configured into nitre with deionized water respectively
In the sour bismuth aqueous solution and wolframic acid sodium water solution, wherein wolframic acid sodium water solution and aqueous bismuth nitrate solution sodium tungstate and bismuth nitrate mole
Concentration is respectively 0.1-0.3mol/L, forms mixed during 1B to be then added to wolframic acid sodium water solution under conditions of stirring
Solution is closed, wherein 1B and the mol ratio of sodium tungstate is 0.5-2:1；（2）Under conditions of stirring, by aqueous bismuth nitrate solution
It is added to step（1）In the mixed solution for obtaining and it is well mixed, wherein bismuth nitrate and the mol ratio of sodium tungstate is 2:1, then use
The pH value of nitric acid regulation reaction system is 0.5-3, then moves in microwave hydrothermal reaction kettle in 140- the mixed solution of gained
180 DEG C are kept for 5-30 minutes；（3）Reaction obtains being urged with cubic structure and height after terminating after cooling down, being centrifuged, wash, dry
Change the Bi of activity2WO6Photochemical catalyst.
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| CN201510298204.2A CN105170137B (en) | 2015-06-03 | 2015-06-03 | A kind of Bi with cubic structure2WO6The preparation method of photochemical catalyst |
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| CN201510298204.2A CN105170137B (en) | 2015-06-03 | 2015-06-03 | A kind of Bi with cubic structure2WO6The preparation method of photochemical catalyst |
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| CN105170137A CN105170137A (en) | 2015-12-23 |
| CN105170137B true CN105170137B (en) | 2017-06-23 |
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| CN114272921B (en) * | 2021-11-23 | 2023-05-09 | 西安近代化学研究所 | Nanometer rod-shaped Bi 2 WO 6 Preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE10353954A1 (en) * | 2003-11-18 | 2005-06-09 | Basf Ag | Preparation of acrolein, for e.g. preparing acrylic acid, comprises heterogeneously catalyzed partial gas phase oxidation of gas mixture comprising propene, molecular oxygen and inert gas at elevated temperature on a fixed catalyst bed |
| EP2324913A1 (en) * | 2009-10-22 | 2011-05-25 | Basf Se | Photo catalyst with increased daylight activity |
| CN102992406B (en) * | 2011-09-15 | 2015-01-07 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of bismuth tungstate nano-sheet |
| DE102012209425A1 (en) * | 2012-06-04 | 2013-12-05 | RUHR-UNIVERSITäT BOCHUM | Preparing bismuth tungstate catalyst useful to prepare acrolein from propene, comprises hydrothermally synthesizing catalyst starting material from bismuth and tungsten precursor compound, and mildly calcining using water-saturated oxygen |
| CN103663562B (en) * | 2013-11-20 | 2015-01-28 | 南京邮电大学 | Method for low-temperature preparation of nano bismuth tungstate |
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