Micronano-structured and graphene based composite visible light catalytic material and preparing method thereof

A catalytic material and graphene-based technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of enhancing composite photocatalytic materials, accelerating the separation of photogenerated electron pairs, and prolonging the life of active components and other issues, to achieve the effect of simple process, energy saving and environmental protection performance, and low cost

Inactive Publication Date: 2015-07-08
JIANGSU UNIV
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Graphene is a new material with a single-layer sheet structure composed of carbon atoms. The thickness of a single-layer carbon source not only makes it suitable for the growth of functional nanomaterials, but also has good electronic conductivity. It has been recognized as a catalyst. As an ideal carrier material, graphene oxide is used as a precursor material in the experiment, and the nucleation and growth of silver phosphate are controlled during the reaction process, so that the final zinc oxide / silver phosphate / graphene composite photocatalytic material has a uniform morphology and relatively The small size, high light transmittance and high specific surface area of ​​graphene make the prepared composite photocatalytic material have good dispersibility and adsorption in solution; its high electrical conductivity further accelerates the separation of photogenerated electron pairs , prolong the life of the active components, and enhance the catalytic activity of the composite photocatalytic material. According to the data verification, using commercial zinc oxide, graphene oxide, silver nitrate and phosphate as raw materials, the hydrothermal method is used to rapidly synthesize micro-nano structure The graphene / zinc oxide / silver phosphate composite visible light photocatalytic material and used for photocatalytic degradation of organic pollutants and water purification have not been reported

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
  • Micronano-structured and graphene based composite visible light catalytic material and preparing method thereof
  • Micronano-structured and graphene based composite visible light catalytic material and preparing method thereof
  • Micronano-structured and graphene based composite visible light catalytic material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Disperse 10 mg of graphene oxide in 50 ml of deionized water for 5 hours to obtain a graphene oxide dispersion. Weigh 1.529 g of silver nitrate and 200 mg of ZnO and dissolve in 50 ml of deionized water for 30 minutes and obtain a mixed precursor solution. A. Add the mixed precursor solution A dropwise to the graphene oxide dispersion under magnetic stirring, and continue to stir at 100 rpm for 6 hours at room temperature to obtain the mixed precursor solution B; weigh 0.426 g Na 2 HPO 4 Dissolve in 20 ml of deionized water to obtain a disodium hydrogen phosphate solution. Add the prepared disodium hydrogen phosphate solution dropwise to the mixed precursor solution B under stirring until the reaction system appears grayish green and turbid. After the addition is complete The mixed solution was continuously stirred at a speed of 200 rpm for 30 minutes and then transferred to a polytetrafluoroethylene liner, and the liner was sealed in a stainless steel hydrothermal reactor...

Embodiment 2

[0028] Disperse 20 mg of graphene oxide in 50 ml of deionized water and sonicate for 5 hours to obtain a graphene oxide dispersion. Weigh 1.529 g of silver nitrate and 300 mg of ZnO and dissolve in 50 ml of deionized water for 30 minutes and obtain a mixed precursor solution. A. Add the mixed precursor solution A dropwise to the graphene oxide dispersion under magnetic stirring, and continue to stir at 100 rpm for 8 hours at room temperature to obtain the mixed precursor solution B; weigh 0.426 g Na 2 HPO 4 Dissolve in 20 ml of deionized water to obtain a disodium hydrogen phosphate solution. Add the prepared disodium hydrogen phosphate solution dropwise to the mixed precursor solution B under stirring until the reaction system appears grayish green and turbid. After the addition is complete The mixed solution was continuously stirred at a speed of 200 revolutions / min for 40 minutes and then transferred to a polytetrafluoroethylene liner, and the liner was sealed in a stainless s...

Embodiment 3

[0030] Disperse 50 mg of graphene oxide in 50 ml of deionized water by sonicating for 5 hours to obtain a graphene oxide dispersion. Weigh 1.529 g of silver nitrate and 400 mg of ZnO and dissolve in 50 ml of deionized water for 30 minutes and obtain a mixed precursor solution. A. Add the mixed precursor solution A dropwise to the graphene oxide dispersion under magnetic stirring, and continue to stir at 100 rpm for 10 hours at room temperature to obtain the mixed precursor solution B; weigh 0.426 g Na 2 HPO 4 Dissolve in 20 ml of deionized water to obtain a disodium hydrogen phosphate solution. Add the prepared disodium hydrogen phosphate solution dropwise to the mixed precursor solution B under stirring until the reaction system appears grayish green and turbid. After the addition is complete The mixed solution was continuously stirred at a speed of 200 revolutions / min for 50 minutes and then transferred to a polytetrafluoroethylene liner, and the liner was sealed in a stainless...

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

PropertyMeasurementUnit
absorbanceaaaaaaaaaa
Login to view more

Abstract

The invention relates to the technical field of photocatalysis, in particular to a micro-nano structured graphene-based composite visible light catalytic material and a preparation method thereof. The steps are as follows: dissolve graphene oxide in water, and ultrasonically treat it to obtain a graphene oxide dispersion; ultrasonically disperse silver nitrate and zinc oxide in deionized water to obtain a mixed solution, and add it dropwise to graphene oxide to disperse under stirring conditions. solution to obtain a mixed precursor; slowly add the configured phosphate solution dropwise to the mixed precursor of graphene oxide, silver nitrate and zinc oxide and continue to stir, and transfer the gray-green product obtained by the reaction into a hydrothermal reaction In the kettle, hydrothermal reaction is carried out at a certain temperature, after being cooled to room temperature, centrifuged, washed with deionized water and absolute ethanol respectively, and vacuum-dried to obtain the composite material. The invention has the advantages of simple preparation process, sufficient required raw materials and superior product performance, and exhibits strong degradation activity to the organic dye rhodamine B under excitation of visible light.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a graphene-based composite visible light catalytic material with a micro-nano structure and a preparation method thereof, specifically to a rapid preparation of graphene / silver phosphate / zinc oxide with a micro-nano structure by a hydrothermal method The invention discloses a method for compounding visible light catalytic materials, belonging to the fields of composite materials, photocatalytic technology and water pollution control. Background technique [0002] Zinc oxide is a semiconductor material with unique photoelectric properties. It has the advantages of high activity, no pollution, large reserves, and low price, making it widely concerned in the field of photocatalysis. However, due to the large band gap of zinc oxide (3.7 eV), only It can use about 4% of the entire visible spectrum to stimulate the generation of electron-hole pairs; and its energy band structur...

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): B01J27/18
Inventor 杨小飞秦洁玲李扬李荣唐华
Owner JIANGSU 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