CN106268762A - A kind of BiVO4the preparation method of photocatalyst - Google Patents
A kind of BiVO4the preparation method of photocatalyst Download PDFInfo
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- CN106268762A CN106268762A CN201610699291.7A CN201610699291A CN106268762A CN 106268762 A CN106268762 A CN 106268762A CN 201610699291 A CN201610699291 A CN 201610699291A CN 106268762 A CN106268762 A CN 106268762A
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- photocatalyst
- liquid
- bivo
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- distilled water
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- 239000011941 photocatalyst Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000012153 distilled water Substances 0.000 claims abstract description 22
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000000746 purification Methods 0.000 claims abstract description 16
- 229940092782 bentonite Drugs 0.000 claims abstract description 15
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 15
- 239000000440 bentonite Substances 0.000 claims abstract description 15
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000005516 engineering process Methods 0.000 claims abstract description 9
- 229910002915 BiVO4 Inorganic materials 0.000 claims abstract description 8
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 8
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000839 emulsion Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 229940080314 sodium bentonite Drugs 0.000 claims abstract description 7
- 229910000280 sodium bentonite Inorganic materials 0.000 claims abstract description 7
- 230000008595 infiltration Effects 0.000 claims abstract description 6
- 238000001764 infiltration Methods 0.000 claims abstract description 6
- 238000013019 agitation Methods 0.000 claims abstract description 4
- 238000009835 boiling Methods 0.000 claims abstract description 4
- 239000000428 dust Substances 0.000 claims abstract description 4
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 238000001073 sample cooling Methods 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims abstract description 4
- 229910003206 NH4VO3 Inorganic materials 0.000 claims abstract 2
- 238000001035 drying Methods 0.000 claims description 5
- 241000143437 Aciculosporium take Species 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- 238000004090 dissolution Methods 0.000 abstract 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 8
- 238000001354 calcination Methods 0.000 description 5
- 238000007146 photocatalysis Methods 0.000 description 5
- 230000001699 photocatalysis Effects 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 229910003256 NaTaO3 Inorganic materials 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
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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
- B01J23/20—Vanadium, niobium or tantalum
- B01J23/22—Vanadium
-
- 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
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- 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
- B01J35/19—Catalysts containing parts with different compositions
-
- 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
- B01J37/0201—Impregnation
- B01J37/0207—Pretreatment of the support
-
- 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
- B01J37/0201—Impregnation
- B01J37/0213—Preparation of the impregnating solution
-
- 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
-
- 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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
-
- 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)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (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)
Abstract
A kind of BiVO4The preparation method of photocatalyst, comprises the following steps: taking sodium bentonite and add in distilled water, be made into ore pulp solution, magnetic agitation 1h, then stand 30min, after being layered, bottom residues outwelled, upper strata emulsion is continuing with.So circulation, dries milkiness grinding and obtains highly purified purification soil.Citric acid is joined in advance with the Bi (NO of appropriate dilute nitric acid dissolution3)·5H2In O solution, add appropriate distilled water, and obtain A liquid with ammonia regulation to required pH value.Weigh NH4VO3And citric acid, it is dissolved in the distilled water of appropriate boiling obtaining B liquid.Mixing A liquid and B liquid, after regulating pH value with dust technology or ammonia, continuously stirred under heat up to obtain presoma.Take the bentonite after appropriate purification and be sufficiently stirred for again, dry and calcine with joining above-mentioned presoma after continuously stirred after appropriate distilled water infiltration, grind after sample cooling, prepare BiVO4Novel photocatalyst.
Description
Technical field
The present invention relates to the catalyst of sewage disposal photocatalysis technology, particularly relate to the novel photocatalysis of a kind of sewage disposal
The preparation method of agent.
Background technology
The problem of environmental pollution of global range increases the weight of day by day, wants to eliminate environmental contaminants then substantial amounts of with greater need for consuming
The energy, this proposes stern challenge to the day by day exhausted energy.For the key being developed into solution problem of this solar energy, and half
Conductor photocatalysis technology is expected to become solution environment and the effective means of energy problem owing to can utilize solar energy.Therefore light
The crisis that catalysis technique will thoroughly solve lack of energy and greenhouse effect brings, becomes that to solve of environmental pollution cheap feasible
Approach.
But studied extensively and profoundly through more than 30 years, photocatalysis technology converts with being the most still difficult to high efficiency low cost
With utilize solar energy.Main cause is a series of semiconductor light-catalysts such as Tio of current people exploitation2、NaTaO3Etc. band gap relatively
Width, only has a response in ultraviolet light range, and wavelength below 4O0nm ultraviolet portion deficiency sunlight gross energy 5%, too
Sunlight energy is concentrated mainly on the visible-range of 400～700nm, reaches the 43% of gross energy.Therefore visible light-responded urging is developed
Agent is to improve solar energy utilization ratio, finally realizes the key of photocatalysis technology commercial application.
Summary of the invention
The problems referred to above existed for prior art, it is high that the applicant provides a kind of catalytic efficiency, has recycling
The BiVO being worth4The preparation method of photocatalyst.
For realizing the object of the invention, it is provided that techniques below scheme: a kind of BiVO4The preparation method of photocatalyst, it is special
Levy and be to comprise the following steps:
A. take sodium bentonite to add in distilled water, be made into ore pulp solution, magnetic agitation 1 ~ 2h, then stand 30 ~ 40min, treat
After layering, bottom residues being outwelled, upper strata emulsion is continuing with;
The most so circulate, milkiness is dried grinding and obtains highly purified purification soil, citric acid is joined in advance with appropriate dilute nitre
Bi (the NO that acid is dissolved3)·5H2In O solution, add appropriate distilled water, and obtain A liquid with ammonia regulation to required pH value;
C. NH is weighed4VO3And citric acid, it is dissolved in the distilled water of appropriate boiling obtaining B liquid;Mixing A liquid and B liquid, with dust technology or
After ammonia regulation pH value, continuously stirred under heat up to obtain presoma;
D. take the bentonite after appropriate purification and fill again with joining above-mentioned presoma after continuously stirred after appropriate distilled water infiltration
Divide stirring, dry and calcine, grind after sample cooling, prepare BiVO4Photocatalyst.
As preferably, the concentration of ore pulp solution is 10%, i.e. sodium bentonite is 1:7 ~ 10 with the mass ratio of distilled water.
As preferably, cycle-index during Purification of Bentonite is 3～5 times.
As preferably, the drying temperature of emulsion is 70～85 DEG C.
As preferably, citric acid and Bi (NO in A liquid3)·5H2The mol ratio of O is 2:0.5 ~ 1.
As preferably, citric acid and NH in B liquid4VO3Mol ratio be 1:2 ~ 5.
As preferably, A liquid and the mixing of B liquid are by by Bi:V=1:1 mixed in molar ratio.
As preferably, mixed solution ph is adjusted to 7.0.
As preferably, obtaining the persistently overheating final temperature of presoma is 80 DEG C.
As preferably, after the bentonite distilled water infiltration after purification, the continuously stirred time is 1h, and the time of being sufficiently stirred for is
6h。
As preferably, it is 80 DEG C that the bentonite after described purification dries temperature.
As preferably, the bentonite calcining heat after described drying is 300 DEG C, and calcination time is 4h.
The method have the benefit that the catalysis material of preparation be also possible to have with low cost, simultaneously have antibacterial, deodorization,
The advantages such as other heavy metal ion can be adsorbed.
Accompanying drawing explanation
Fig. 1 is the treatment effect figure of embodiment 1.
Fig. 2 is the treatment effect figure of embodiment 2.
Detailed description of the invention
A kind of BiVO4The preparation method of photocatalyst, comprises the following steps:
A. take sodium bentonite to add in distilled water, be made into ore pulp solution, magnetic agitation 1h, then stand 30min, wait to be layered
After, bottom residues to be outwelled, upper strata emulsion is continuing with;
The most so circulate, milkiness is dried grinding and obtains highly purified purification soil, citric acid is joined in advance with appropriate dilute nitre
Bi (the NO that acid is dissolved3)·5H2In O solution, add appropriate distilled water, and obtain A liquid with ammonia regulation to required pH value;
C. NH is weighed4VO3And citric acid, it is dissolved in the distilled water of appropriate boiling obtaining B liquid;Mixing A liquid and B liquid, with dust technology or
After ammonia regulation pH value, continuously stirred under heat up to obtain presoma;
D. take the bentonite after appropriate purification and fill again with joining above-mentioned presoma after continuously stirred after appropriate distilled water infiltration
Divide stirring, dry and calcine, grind after sample cooling, prepare BiVO4Photocatalyst.
The concentration of ore pulp solution is 10%, i.e. sodium bentonite is 1:10 with the mass ratio of distilled water.During Purification of Bentonite
Cycle-index is 3～5 times.The drying temperature of emulsion is 70～85 DEG C.Citric acid and Bi (NO in A liquid3)·5H2The mol ratio of O
For 2:1.Citric acid and NH in B liquid4VO3Mol ratio be 1:2.A liquid and the mixing of B liquid are by by Bi:V=1:1 mixed in molar ratio.Mixed
Solution ph after conjunction is adjusted to 7.0.Obtaining the persistently overheating final temperature of presoma is 80 DEG C.Bentonite after purification steams
After distilled water infiltration, the continuously stirred time is 1h, and the time of being sufficiently stirred for is 6h.It is 80 DEG C that bentonite after described purification dries temperature.
Bentonite calcining heat after described drying is 300 DEG C, and calcination time is 4h.
Below in conjunction with example, invention is specifically described.
Embodiment 1
Waste water is the dyeing waste water of certain textile mills.BiVO after calcining by different temperatures respectively4This is given up by/bentonite photocatalyst
Water processes, its result such as Fig. 1.
Embodiment 2
Waste water is the dyeing waste water of certain textile mills.With different photocatalysts, this waste water is processed respectively, its result such as Fig. 2.
Claims (10)
1. a BiVO4The preparation method of photocatalyst, it is characterised in that comprise the following steps:
A. take sodium bentonite to add in distilled water, be made into ore pulp solution, magnetic agitation 1 ~ 2h, then stand 30 ~ 40min, treat
After layering, bottom residues being outwelled, upper strata emulsion is continuing with;
The most so circulate, milkiness is dried grinding and obtains highly purified purification soil, citric acid is joined in advance with appropriate dilute nitre
Bi (the NO that acid is dissolved3)·5H2In O solution, add appropriate distilled water, and obtain A liquid with ammonia regulation to required pH value;
C. NH is weighed4VO3And citric acid, it is dissolved in the distilled water of appropriate boiling obtaining B liquid;Mixing A liquid and B liquid, with dust technology or ammonia
After water regulation pH value, continuously stirred under heat up to obtain presoma;
D. take the bentonite after appropriate purification and fill again with joining above-mentioned presoma after continuously stirred after appropriate distilled water infiltration
Divide stirring, dry and calcine, grind after sample cooling, prepare BiVO4Photocatalyst.
A kind of BiVO the most according to claim 14The preparation of photocatalyst, it is characterised in that the concentration of ore pulp solution is 10 ~
20%, i.e. sodium bentonite is 1:7 ~ 10 with the mass ratio of distilled water.
A kind of BiVO the most according to claim 14The preparation method of photocatalyst, it is characterised in that during Purification of Bentonite
Cycle-index is 3～5 times.
A kind of BiVO the most according to claim 14The preparation method of photocatalyst, it is characterised in that the drying temperature of emulsion
Degree is 70～85 DEG C.
A kind of BiVO the most according to claim 14The preparation method of photocatalyst, it is characterised in that citric acid and Bi in A liquid
(NO3)·5H2The mol ratio of O is 2:0.5 ~ 1.
A kind of BiVO the most according to claim 14The preparation method of photocatalyst, it is characterised in that in B liquid citric acid and
NH4VO3Mol ratio be 1:2 ~ 5.
A kind of BiVO the most according to claim 14The preparation method of photocatalyst, it is characterised in that A liquid and the mixing of B liquid are pressed
By Bi:V=1:1 mixed in molar ratio.
A kind of BiVO the most according to claim 74The preparation method of photocatalyst, it is characterised in that mixed pH value of solution
Value is adjusted to 7.0.
A kind of BiVO the most according to claim 14The preparation method of photocatalyst, it is characterised in that obtain presoma and continue
The final temperature heated up is 80 DEG C.
A kind of BiVO the most according to claim 14The preparation method of photocatalyst, it is characterised in that the bentonite after purification
After infiltrating with distilled water, the continuously stirred time is 1h, and the time of being sufficiently stirred for is 6h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610699291.7A CN106268762A (en) | 2016-08-22 | 2016-08-22 | A kind of BiVO4the preparation method of photocatalyst |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610699291.7A CN106268762A (en) | 2016-08-22 | 2016-08-22 | A kind of BiVO4the preparation method of photocatalyst |
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| CN106268762A true CN106268762A (en) | 2017-01-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107349924A (en) * | 2017-08-07 | 2017-11-17 | 浙江工业大学 | BiVO4/ galapectite composite nano catalysis material and preparation method thereof |
| CN111170436A (en) * | 2020-01-18 | 2020-05-19 | 运城学院 | Flocculating agent for treating printing and dyeing sewage and sewage treatment method |
| CN116237037A (en) * | 2023-03-01 | 2023-06-09 | 西南科技大学 | Preparation method and application of bismuth vanadate nanosheet composite material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104069877A (en) * | 2014-06-25 | 2014-10-01 | 湖南科技大学 | Preparation method and application of Fe4I3O24H15 visible-light-induced photocatalyst |
| US20150361566A1 (en) * | 2014-06-16 | 2015-12-17 | Wisconsin Alumni Research Foundation | Synthesis of high-surface-area nanoporous bivo4 electrodes |
-
2016
- 2016-08-22 CN CN201610699291.7A patent/CN106268762A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150361566A1 (en) * | 2014-06-16 | 2015-12-17 | Wisconsin Alumni Research Foundation | Synthesis of high-surface-area nanoporous bivo4 electrodes |
| CN104069877A (en) * | 2014-06-25 | 2014-10-01 | 湖南科技大学 | Preparation method and application of Fe4I3O24H15 visible-light-induced photocatalyst |
Non-Patent Citations (1)
| Title |
|---|
| 李南南: "BiVO4/膨润土光催化剂的制备及其对印染废水处理的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107349924A (en) * | 2017-08-07 | 2017-11-17 | 浙江工业大学 | BiVO4/ galapectite composite nano catalysis material and preparation method thereof |
| CN111170436A (en) * | 2020-01-18 | 2020-05-19 | 运城学院 | Flocculating agent for treating printing and dyeing sewage and sewage treatment method |
| CN116237037A (en) * | 2023-03-01 | 2023-06-09 | 西南科技大学 | Preparation method and application of bismuth vanadate nanosheet composite material |
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