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

Photocatalyst of zinc oxide possessing visible light activity and preparation method

A zinc oxide and catalyst technology, which is applied in the field of zinc oxide photocatalyst and its preparation, can solve the problem of photocatalyst loss of activity, achieve the effects of enriching research and application content, promoting development, and being easy to implement

Inactive Publication Date: 2005-08-31
SOUTH CHINA UNIV OF TECH
View PDF5 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One: TiO 2 Dye photosensitization of photocatalysts, sensitization requires TiO 2 Adsorb dyes, however, they are difficult to be applied to photocatalytic degradation reactions, because they themselves will also be degraded and the photocatalyst will lose its activity

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
  • Photocatalyst of zinc oxide possessing visible light activity and preparation method
  • Photocatalyst of zinc oxide possessing visible light activity and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In the flask of 500ml, add 1.0g zinc acetate dihydrate, 5g polyvinylpyrrolidone (molecular weight 20,000), be dissolved in ethylene glycol respectively and mix homogeneously, wherein the weight ratio of zinc acetate dihydrate and polyvinylpyrrolidone is 0.2: 1, The weight ratio of ethylene glycol to zinc acetate dihydrate is 300:1; heat up to 140°C under strong stirring, condense and reflux for 5 hours, separate the precipitate by suction filtration while it is hot, wash with absolute ethanol three times, and dry at 120°C 30min, and finally roasted at 300°C to obtain zinc oxide with visible light activity.

Embodiment 2

[0022] Add 1.0g of zinc acetate dihydrate and 2.0g of polyvinylpyrrolidone (molecular weight: 30,000) into a 500ml flask, dissolve them in ethylene glycol and mix well, wherein the weight ratio of zinc acetate dihydrate to polyvinylpyrrolidone is 0.5:1 , the weight ratio of ethylene glycol to zinc acetate dihydrate is 200:1; start to heat up to 195°C under vigorous stirring, condense and reflux for 3 minutes, separate the precipitate by suction filtration while it is hot, wash with absolute ethanol 3 times, and heat up to 120°C Drying for 30 minutes, and finally calcination at 600°C, to obtain zinc oxide with visible light activity.

Embodiment 3

[0024] Add 1.0g of zinc acetate dihydrate and 0.25g of polyvinylpyrrolidone (molecular weight: 60,000) into a 500ml flask, dissolve them in ethylene glycol and mix well, wherein the weight ratio of zinc acetate dihydrate to polyvinylpyrrolidone is 4:1 , the weight ratio of ethylene glycol to zinc acetate dihydrate is 50:1; start to heat up to 200°C under strong stirring, condense and reflux for 1 hour, separate the precipitate by suction filtration while it is hot, wash with absolute ethanol three times, 120°C Dry for 30 minutes, and finally bake at 700°C to obtain zinc oxide with visible light activity.

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

A zinc oxide photocatalyst with visual light activity is prepared through dissolving dihydrated zinc acetate and polyvinyl pyrrolidone respectively in ethanediol, mixing, stirring and heating while reflux. Under action of visual light, it has high degradating rate to methyl orange (increased by more than 2 times).

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a zinc oxide photocatalyst with visible light activity and a preparation method thereof. Background technique [0002] Since the discovery of TiO by Fujishima and Honda in 1972 2 Since single crystal electrodes can not only decompose water but also decompose other substances under the action of light, photocatalytic reactions have received widespread attention in environmental governance and energy development. The research and development of photocatalytic materials has become a hot research topic at home and abroad. . However, most of the reported photocatalytic efficiency is low, the band gap is wide, and they can only show photochemical activity in the ultraviolet region. However, in the solar spectrum, ultraviolet light (below 400nm) is less than 5%, while visible light with a wavelength of 400-750nm accounts for 43%. If the photocatalyst cann...

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
IPC IPC(8): B01J23/06B01J37/03
Inventor 彭峰陈水辉王红娟张雷
Owner SOUTH CHINA UNIV OF TECH
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