Preparation method and application of bismuth tungstate/expanded graphite sheet nanocomposite

A technology of expanded graphite sheets and composite materials, applied in chemical instruments and methods, chemical/physical processes, water treatment of special compounds, etc., can solve problems such as uneven distribution, agglomeration, and influence on bonding, so as to avoid agglomeration and improve catalytic activity Improve, enhance the effect of activity

Active Publication Date: 2016-05-18
CHANGZHOU UNIV
View PDF2 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problems existing in the application of clay are mainly reflected in the dispersion problem. For example, if the particle size of the loaded material is large, even on a benign carrier, the distribution will be uneven, agglomeration will occur, and the combination will be affected.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method and application of bismuth tungstate/expanded graphite sheet nanocomposite
  • Preparation method and application of bismuth tungstate/expanded graphite sheet nanocomposite
  • Preparation method and application of bismuth tungstate/expanded graphite sheet nanocomposite

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] Preparation of expanded graphite:

[0029] According to the mass ratio of flake graphite, concentrated sulfuric acid, hydrogen peroxide and potassium dichromate as 10:30:5:1, take samples, oxidize in a constant temperature water bath at 40°C, intercalate for 12 hours, and then use flake graphite 1:0.9HNO 3 The amount of nitric acid was added for secondary intercalation, and the reaction was continued for 30 minutes, washed with water, dried, and expanded instantaneously in a muffle furnace at 900°C to obtain expanded graphite.

Embodiment 1

[0031] First weigh 0.17g of bismuth nitrate and dissolve it in 50ml of deionized water, stir magnetically for 30min to obtain a white solution; then add 0.047g of sodium tungstate to the white solution, continue magnetically stirring for 30min to obtain a white mixed solution, add to the Add 0.2g of expanded graphite to the solution and continue magnetic stirring for 10min to obtain a black turbid solution; put the above solution into a 100ml polytetrafluoroethylene reactor, and then conduct a hydrothermal reaction at 180°C for 24h; after the reaction, take out the reactor to obtain a black precipitate in the lower layer, The upper layer clarifies the solution; the black precipitate is washed with deionized water and absolute ethanol, then dried at 80°C, and ground to obtain a bismuth tungstate / expanded graphite sheet nanostructure composite material.

[0032] The obtained sample is subjected to X-ray powder diffraction experiment, and its morphology and structure are observed ...

Embodiment 2

[0040] Weigh 0.17g of bismuth nitrate and dissolve it in 50ml of deionized water, stir magnetically for 30min to obtain a white solution; then add 0.05g of sodium tungstate to the white solution, continue magnetically stirring for 30min to obtain a white mixed solution. Add 0.3g of expanded graphite and continue magnetic stirring for 10 minutes to obtain a black turbid solution; put the above solution into a 100ml polytetrafluoroethylene reactor, and then conduct a hydrothermal reaction at 170°C for 18 hours; after the reaction, take out the reactor to obtain a black precipitate in the lower layer, and the upper layer is clear Solution; wash the black precipitate with deionized water and absolute ethanol, then dry it at 70° C., and grind it to obtain a bismuth tungstate / expanded graphite flake nanostructure composite material. Subsequent detection is as in Example 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of supported composites and particularly relates to a preparation method and an application of a nanomaterial taking bismuth tungsten as an active component. Bismuth nitrate, sodium tungstate and expanded graphite are added to deionized water while stirring, then the mixture is transferred to a reaction kettle to have a heat preservation reaction under the hydrothermal condition, water washing, alcohol washing, drying and grinding are performed, and thus the bismuth tungstate / expanded graphite sheet nanocomposite is obtained. The composite is high in catalytic activity and can be applied to photocatalytic degradation of organic matters; besides, the reduction of the particle size of single bismuth tungstate particles on a supporter is effectively controlled, and agglomeration is fully avoided when prepared small-particle bismuth tungstate is supported on other clay supporters.

Description

technical field [0001] The invention belongs to the technical field of loaded composite materials, and in particular relates to a preparation method and application of a nanomaterial with expanded graphite nanosheets as a carrier and bismuth tungstate as an active component. Background technique [0002] Bismuth tungstate (Bi 2 WO 6 ) is a layered structure with characteristics such as dielectric, luminescence, and ion conductor, and bismuth tungstate has photocatalytic properties under visible light, and can photolyze water and photodegrade organic pollutants under visible light, so bismuth tungstate (Bi 2 WO 6 ) has good application prospects in many related fields, and it is also a good choice to load it on clay as a composite material. [0003] Clay has strong adsorption capacity, good thermal stability, acid and alkali resistance, rheological properties, filling properties, and has good functions such as ion exchange, salt resistance, gelation resistance, pulp making...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/31C02F1/30C02F101/38
CPCB01J23/31B01J35/004C02F1/30C02F2101/40C02F2305/10
Inventor 李霞章朱伟张作松陆晓旺左士祥姚超陈志刚
Owner CHANGZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap