Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method for preparing a three-dimensional graphene/tungsten-based nanosheet/magnesium-doped zinc oxide layer-by-layer assembly structure

A layer-by-layer assembly and graphene technology, applied in the field of photocatalytic materials, to achieve good electron transport performance, less environmental pollution, and simple preparation process

Inactive Publication Date: 2017-05-10
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the band gap of zinc oxide, only the ultraviolet part of sunlight can be used

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
  • A method for preparing a three-dimensional graphene/tungsten-based nanosheet/magnesium-doped zinc oxide layer-by-layer assembly structure
  • A method for preparing a three-dimensional graphene/tungsten-based nanosheet/magnesium-doped zinc oxide layer-by-layer assembly structure
  • A method for preparing a three-dimensional graphene/tungsten-based nanosheet/magnesium-doped zinc oxide layer-by-layer assembly structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Add 1 g of tungsten oxide powder and 0.1 g of cetyltrimethylammonium bromide into 500 mL of deionized water, ultrasonically disperse for 30 min and then stir for 20 min to obtain a tungsten oxide dispersion;

[0031] (2) Under ultrasonic vibration, use a high-speed mechanical shear with a rotation speed of 1000 r / min to shear the tungsten oxide dispersion in the above step (1) for 1 h, and then centrifuge it with a centrifuge with a rotation speed of 4000 r / min. Stir and ultrasonically disperse for 1 h to obtain a tungsten oxide nanosheet solution;

[0032] (3) Add 10 mL of graphene oxide solution with a concentration of 1 g / L into 50 mL of deionized water and ultrasonically disperse for 20 min to obtain a graphene dispersion;

[0033] (4) Add 0.2 g of polyacrylic acid to the graphene oxide dispersion obtained in (3) above, and ultrasonically disperse for 30 minutes to obtain a graphene oxide dispersion;

[0034] (5) Under stirring and ultrasonic oscillation, slowly ...

Embodiment 2

[0040] (1) Add 5 g of tungsten sulfide powder and 0.5 g of cetyltrimethylammonium bromide into 800 mL of deionized water, ultrasonically disperse for 40 min and then stir for 40 min to obtain a tungsten sulfide dispersion;

[0041] (2) Under ultrasonic vibration, use a high-speed mechanical shear with a rotation speed of 7000 r / min to shear the tungsten sulfide dispersion in the above step (1) for 3 h, and then centrifuge it with a centrifuge with a rotation speed of 8000 r / min. Stir and ultrasonically disperse for 3 h to obtain a tungsten sulfide nanosheet solution;

[0042] (3) Add 15 mL of reduced graphene oxide solution with a concentration of 1.2 g / L into 70 mL of deionized water and ultrasonically disperse for 40 min to obtain a graphene dispersion;

[0043] (4) Add 0.3 g of sodium polyacrylate to the reduced graphene oxide dispersion obtained in (3) above, and disperse ultrasonically for 20 min to obtain a graphene dispersion;

[0044] (5) Under stirring and ultrasonic...

Embodiment 3

[0049] (1) Add 8 g of tungsten sulfide powder and 0.8 g of cetyltrimethylammonium bromide into 1000 mL of deionized water, ultrasonically disperse for 30 min and then stir for 30 min to obtain a tungsten sulfide dispersion;

[0050] (2) Under ultrasonic vibration, use a high-speed mechanical shear with a speed of 5000 r / min to shear the tungsten sulfide dispersion in the above step (1) for 2 h, and then centrifuge it with a centrifuge with a speed of 5000 r / min. Stir and ultrasonically disperse for 2 h to obtain a tungsten sulfide nanosheet solution;

[0051] (3) Add 10 mL of graphene solution with a concentration of 0.8 g / L into 50 mL of deionized water and ultrasonically disperse for 20 min to obtain a graphene dispersion;

[0052] (4) Add 0.2 g of sodium polyacrylate to the graphene dispersion obtained in (3) above, and disperse ultrasonically for 40 min to obtain a graphene dispersion;

[0053] (5) Slowly add 4 mL of the tungsten sulfide nanosheet solution obtained in the...

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 present invention relates to a three-dimensional graphene / tungsten-based nano-sheet / layer assembly method for preparing a zinc oxide doped with Mg structure, which graphene, tungsten-based nano-sheet, zinc acetate and magnesium acetate as raw materials, with deionized water as solvent, oxalic acid as complexing agent, prepared coprecipitation method and subsequent thermal dimensional graphene / tungsten-based nano-sheet / Mg-doped zinc oxide layers of the assembled structure. The maximum feature of the invention is the use of mechanical shear Preparation of dispersion solution of water-soluble tungsten-based nano-sheet, and obtain three-dimensional graphene / tungsten-based nano-sheet in an aqueous solution / Mg-doped zinc oxide layers of the assembled structure, the preparation process is simple, easy to scale production; the same time, the three-dimensional graphene / tungsten-based nano-sheet structure having a very good synergistic effect is more than a single material and facilitate separation of the photogenerated electron-hole pairs. The three-dimensional graphene / tungsten-based nano-sheet / Mg-doped zinc oxide layers of the assembled structure has good photocatalytic properties, can be used in sewage treatment, water photolysis, air purification and other fields, and solar cells.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, and relates to a method for preparing a three-dimensional graphene / tungsten-based nanosheet / magnesium-doped zinc oxide layer-by-layer assembly structure. Background technique [0002] Graphene has a special structure and excellent performance. Using it as a catalyst carrier can reduce the recombination of photogenerated electron-hole pairs in ZnO and effectively improve the photocatalytic performance of ZnO. However, due to the bandgap of zinc oxide, only the ultraviolet part of sunlight can be used. In the composite system, the main function of graphene is to disperse ZnO nanostructures and transport photogenerated electrons, which itself has no photocatalytic activity. Therefore, it is necessary to further improve the utilization rate and photocatalytic activity of graphene / zinc oxide composites for visible light. [0003] Tungsten-based nanosheets have a large specific surface area an...

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 Patents(China)
IPC IPC(8): B01J23/30B01J35/02B01J35/00
Inventor 陈传盛于伟伟刘天贵曹时义梁波
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com