CN107185521A - A kind of catalysis material and preparation method thereof - Google Patents
A kind of catalysis material and preparation method thereof Download PDFInfo
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- CN107185521A CN107185521A CN201710356041.8A CN201710356041A CN107185521A CN 107185521 A CN107185521 A CN 107185521A CN 201710356041 A CN201710356041 A CN 201710356041A CN 107185521 A CN107185521 A CN 107185521A
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- catalysis material
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- sodium tungstate
- mixed solution
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- 238000006555 catalytic reaction Methods 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000011259 mixed solution Substances 0.000 claims abstract description 11
- XMVONEAAOPAGAO-UHFFFAOYSA-N sodium tungstate Chemical compound [Na+].[Na+].[O-][W]([O-])(=O)=O XMVONEAAOPAGAO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000243 solution Substances 0.000 claims abstract description 10
- 229910052777 Praseodymium Inorganic materials 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 239000008367 deionised water Substances 0.000 claims abstract description 7
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 6
- RXPAJWPEYBDXOG-UHFFFAOYSA-N hydron;methyl 4-methoxypyridine-2-carboxylate;chloride Chemical compound Cl.COC(=O)C1=CC(OC)=CC=N1 RXPAJWPEYBDXOG-UHFFFAOYSA-N 0.000 claims abstract description 4
- YWECOPREQNXXBZ-UHFFFAOYSA-N praseodymium(3+);trinitrate Chemical compound [Pr+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O YWECOPREQNXXBZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000002244 precipitate Substances 0.000 claims abstract description 4
- 239000000725 suspension Substances 0.000 claims abstract description 4
- 238000013019 agitation Methods 0.000 claims abstract description 3
- 238000009825 accumulation Methods 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims 1
- 229910017604 nitric acid Inorganic materials 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 239000004065 semiconductor Substances 0.000 description 5
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 229960000907 methylthioninium chloride Drugs 0.000 description 3
- 230000001699 photocatalysis Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000011941 photocatalyst Substances 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- PBYZMCDFOULPGH-UHFFFAOYSA-N tungstate Chemical compound [O-][W]([O-])(=O)=O PBYZMCDFOULPGH-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/03—Precipitation; Co-precipitation
- B01J37/031—Precipitation
- B01J37/033—Using Hydrolysis
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
-
- 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
-
- 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
- C02F2101/36—Organic compounds containing halogen
-
- 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
-
- 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
- C02F2101/40—Organic compounds containing sulfur
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Catalysts (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention provides a kind of catalysis material and preparation method thereof, the molecular formula of the catalysis material is Pr/Bi2WO6, Pr and Bi mol ratio are 0.5 2.0:100；Its preparation method is first to add to sodium tungstate to obtain sodium tungstate solution in deionized water, praseodymium nitrate and bismuth nitrate is added to mixed solution is obtained in deionized water；Under agitation, sodium tungstate solution is added drop-wise in mixed solution, obtains milky suspension, and adjust pH to 2, be subsequently placed in autoclave, reacted；The pale yellow precipitate that reaction is produced is collected, is washed with deionized, then is washed with absolute ethyl alcohol, dries, that is, obtains catalysis material.The catalysis material of the present invention is the Bi after loose structure, doping Pr2WO6Red shift occurs for ABSORPTION EDGE, and the utilization rate to visible ray is improved.
Description
Technical field
The invention belongs to catalysis material technical field, and in particular to a kind of catalysis material responded with high visible
And preparation method thereof.
Background technology
In recent years, semiconductor light-catalyst is received due to its application potential in terms of environmental improvement and solar energy conversion
Extensive concern.In these semiconductors, because bismuth tungstate（Bi2WO6）The band gap of relative narrower, under visible light illumination with good
Good photocatalysis performance and be proved to be most promising semiconductor catalyst.
Bi2WO6It is a kind of Ca-Ti ore type semiconductor, the electron transition that is stimulated after illumination produces electron hole pair, electron hole
To redox ability it is extremely strong, easily occur redox reaction with organic matter and high-molecular compound.Bi2WO6Forbidden band
Width is 2.75ev,, can quilt in W atom 5d tracks formation conduction band in 6s and O atom 2p hybridized orbit the formation valence band of Bi atoms
Excited by visible light, can have higher photocatalytic activity under visible light.
Find in actual applications, pure Bi2WO6The photo-generate electron-hole recombination rate of catalyst is higher, and electron hole is not yet
Just it has been combined when producing free radical, has made the reduction of its photocatalytic activity.Rare earth element has the energy level enriched and 4f electron transitions
Characteristic, is also easy to produce polyelectron configuration, there is special optical property, in Photocatalyst and construction novel photocatalyst system
Aspect has good application.In Bi2WO6The middle appropriate rare earth element of doping, in effectively reduction semiconductor photoproduction electron-hole recombinations
On the basis of, the utilization rate of carrier is improved, optimizes Bi2WO6Photocatalytic activity, have good effect.
The content of the invention
The technical problem of solution：It is an object of the invention to prepare it is a kind of with high visible respond catalysis material and
Its preparation method.
Technical scheme：A kind of catalysis material, its molecular formula is Pr/Bi2WO6, Pr and Bi mol ratio are 0.5-2.0:
100。
Further, the crystal structure of the catalysis material is the (Bi by being alternately present2O2)2+Layer and it is octahedral
(WO6)6-Accumulation is formed.
The preparation method of above-mentioned catalysis material, comprises the following steps：
Step 1, sodium tungstate is added to and sodium tungstate solution is obtained in deionized water, praseodymium nitrate and bismuth nitrate are added in deionized water
Obtain mixed solution；
Step 2, under agitation, sodium tungstate solution is added drop-wise in mixed solution, obtains milky suspension, and adjust pH
To 2；
Step 3, step 2 gained mixed solution is placed in autoclave, reacted；
Step 4, the pale yellow precipitate that reaction is produced is collected, be washed with deionized, then washed with absolute ethyl alcohol, dried, produce
To catalysis material.
Further, nitre acid for adjusting pH is used in step 2.
Further, in step 3 reaction temperature be 120-200 DEG C, the time be 12h.
Further, drying condition is 60 DEG C, 6h in step 4.
Beneficial effect：
1. the catalysis material of the present invention is loose structure, the Bi after doping Pr2WO6Red shift occurs for ABSORPTION EDGE, to visible ray
Utilization rate is improved；
2. Pr doping is 1%, Pr/Bi2WO6The energy gap of sample is 2.56eV, wider than the forbidden band undoped with sample
Degree narrows, degradation rate highest；
3. raw material is cheap, prepare simply, it is all very environmentally friendly when preparing and using.
Brief description of the drawings
The Pr/Bi that Fig. 1 is different doping Pr in embodiment 12WO6UV-vis DRS collection of illustrative plates；
The Pr/Bi that Fig. 2 is different doping Pr in embodiment 12WO6The influence of photocatalytic degradation methylene blue.
Embodiment
Embodiment 1
Step 1, the sodium tungstate for weighing 2.5mmol is dissolved in 15mL deionized waters, weighs a certain amount of praseodymium nitrate and bismuth nitrate
It is dissolved in 50mL deionized waters and forms mixed solution（The molar percentage of praseodymium and bismuth is respectively 0%, 0.5%, 1.0%, 1.5%,
2.0%, tungsten：Praseodymium+bismuth=1：2）；
Step 2, under continuous stirring, sodium tungstate solution is slowly dropped in mixed solution, obtains milky suspension, be used in combination
Nitre acid for adjusting pH value is to 2；
Step 3, step 2 gained mixed solution is placed in 100mL autoclaves, reactor loading is 70% or so,
Room temperature is cooled to after reacting 12h at a temperature of 120 DEG C, 160 DEG C, 180 DEG C, 200 DEG C；
Step 4, the pale yellow precipitate that reaction is produced is collected, washs for several times, is done in 60 DEG C of baking oven through deionized water and ethanol
Dry 6 hours, obtain Pr/Bi2WO6。
As shown in figure 1, present invention gained Pr/Bi2WO6Red shift occurs for ABSORPTION EDGE；It is computed obtaining, when Pr doping is
When 1%, Pr/Bi2WO6Energy gap be 2.56eV.
Performance test
The methylene blue solution for preparing 10mg/L makees target degradation product, and light source is used as using 500W mercury lamps.Weigh 25mg Pr/
Bi2WO6Add in 100mL methylene blue solutions, first darkroom is stirred 0.5 hour, system is reached that adsorption-desorption is balanced.
Lamp source is opened, a sample was taken every 25 minutes, 5mL is extracted every time, and is removed with centrifuge after suspended particulate, to molten
Liquid carries out absorbance test.
As shown in Fig. 2 present invention gained Pr/Bi2WO6It is higher to the degradation rate of visible ray；When Pr doping is 1%,
Pr/Bi2WO6Degradation rate highest.
Claims (6)
1. a kind of catalysis material, it is characterised in that：Molecular formula is Pr/Bi2WO6, Pr and Bi mol ratio are 0.5-2.0:100.
2. catalysis material according to claim 1, it is characterised in that：The crystal structure of the catalysis material is by handing over
For (the Bi of appearance2O2)2+Layer and octahedral (WO6)6-Accumulation is formed.
3. the preparation method of the catalysis material described in claim 1, it is characterised in that：Comprise the following steps：
Step 1, sodium tungstate is added to and sodium tungstate solution is obtained in deionized water, praseodymium nitrate and bismuth nitrate are added in deionized water
Obtain mixed solution；
Step 2, under agitation, sodium tungstate solution is added drop-wise in mixed solution, obtains milky suspension, and adjust pH
To 2；
Step 3, step 2 gained mixed solution is placed in autoclave, reacted；
Step 4, the pale yellow precipitate that reaction is produced is collected, be washed with deionized, then washed with absolute ethyl alcohol, dried, produce
To catalysis material.
4. the preparation method of catalysis material according to claim 3, it is characterised in that：Adjusted in step 2 using nitric acid
pH。
5. the preparation method of catalysis material according to claim 3, it is characterised in that：Reaction temperature is in step 3
120-200 DEG C, the time be 12h.
6. the preparation method of catalysis material according to claim 3, it is characterised in that：Drying condition is 60 in step 4
℃、6h。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710356041.8A CN107185521A (en) | 2017-05-19 | 2017-05-19 | A kind of catalysis material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710356041.8A CN107185521A (en) | 2017-05-19 | 2017-05-19 | A kind of catalysis material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107185521A true CN107185521A (en) | 2017-09-22 |
Family
ID=59874191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710356041.8A Pending CN107185521A (en) | 2017-05-19 | 2017-05-19 | A kind of catalysis material and preparation method thereof |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107983336A (en) * | 2017-12-11 | 2018-05-04 | 湖北大学 | A kind of praseodymium doped bismuth tungstate light urges agent and preparation method thereof |
| CN108355646A (en) * | 2017-12-29 | 2018-08-03 | 盐城工学院 | A kind of preparation method of bismuth based compound nano-photocatalyst |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103638923A (en) * | 2013-09-12 | 2014-03-19 | 陕西科技大学 | Rare earth element Nd-doped Bi2WO6 composite photocatalyst, preparation method therefor and applications thereof |
-
2017
- 2017-05-19 CN CN201710356041.8A patent/CN107185521A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103638923A (en) * | 2013-09-12 | 2014-03-19 | 陕西科技大学 | Rare earth element Nd-doped Bi2WO6 composite photocatalyst, preparation method therefor and applications thereof |
Non-Patent Citations (1)
| Title |
|---|
| CHUNYING WANG等: ""Photocatalytic degradation of two different types of dyes by synthesized La/Bi2WO6"", 《RSC ADVANCES》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107983336A (en) * | 2017-12-11 | 2018-05-04 | 湖北大学 | A kind of praseodymium doped bismuth tungstate light urges agent and preparation method thereof |
| CN108355646A (en) * | 2017-12-29 | 2018-08-03 | 盐城工学院 | A kind of preparation method of bismuth based compound nano-photocatalyst |
| CN108355646B (en) * | 2017-12-29 | 2021-04-06 | 盐城工学院 | Preparation method of bismuth compound nano photocatalyst |
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