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

Preparation method of graphene/g-C3N4 compound photocatalyst

A technology of g-c3n4 and composite light, applied in the field of new energy photocatalytic materials, can solve the problems of g-C3N4 being difficult to dissolve, difficult to uniformly compound graphene, and difficult to surface functional groups, so as to improve the photocatalytic activity, increase the Redox ability, the effect of enhancing charge separation efficiency

Inactive Publication Date: 2014-05-07
JIANGSU YUEDA NEW MATERIALS TECH
View PDF5 Cites 44 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The g-C3N4 prepared by this method is difficult to dissolve in water and organic solvents, and it is very difficult to functionalize its surface, and the specific surface area of ​​g-C3N4 prepared by this method is very small (<5m2 / g), and it is difficult to be uniform with graphene. complex, severely limiting its potential photocatalytic 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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 10g of melamine and put it in a muffle furnace, and roast it at a high temperature of 550°C for 2h; add 3g of the roasted powder to 50ml of 20% hydrochloric acid and stir for 2h, then wash with deionized water until the surface is acid-base Value pH=6.7~7.3; The modified Hummers method is used to prepare graphite oxide. During this process, the low-temperature oxidation reaction time is increased to 2h, and then benzyl benzoate is used as a solvent to ultrasonically peel off the graphite oxide. The ultrasonic power is 100w, ultrasound, centrifugation, and finally The supernatant liquid is extracted and dried to obtain polar graphene oxide powder; the graphene oxide powder prepared above and g-C3N4 are mixed with a high-energy ball mill for 60 minutes, and dispersed in hydrazine hydrate. The quality of graphene oxide and hydrazine hydrate The ratio is 10:5. The mixed system was transferred to a polytetrafluoroethylene lined autoclave and reacted at 200°C for 2h. Th...

Embodiment 2

[0024] Weigh 12g of melamine and put it into the muffle furnace, and roast at 550℃ for 2h; add 3g of the roasted powder to 50ml of 37% hydrochloric acid and stir for 2h, then wash with deionized water until the surface is acid-base Value pH=6.7~7.3; The modified Hummers method is used to prepare graphite oxide. During this process, the low-temperature oxidation reaction time is increased to 3h, and then butyrolactone is used as a solvent to ultrasonically peel off the graphite oxide. The ultrasonic power is 100w, ultrasonic, centrifugal, and finally extracted The supernatant liquid is dried to obtain polar graphene oxide powder; the graphene oxide powder prepared above and g-C3N4 are mixed with a high-energy ball mill for 120 minutes, and after being uniformly dispersed, they are dissolved in hydrazine hydrate. The quality of graphene oxide and hydrazine hydrate is matched. The ratio is 10:10. The mixed system was transferred to a polytetrafluoroethylene lined autoclave and rea...

Embodiment 3

[0026] Weigh 15g of melamine and put it in a muffle furnace, and roast it at a high temperature of 550°C for 4h; add 3g of the roasted powder to 50ml of 37% hydrochloric acid and stir for 3h, then wash with deionized water until the surface is acid-base Value pH=6.7~7.3; The modified Hummers method is used to prepare graphite oxide. In this process, the low-temperature oxidation reaction time is increased to 3h, and then benzyl benzoate is used as a solvent to ultrasonically peel off the graphite oxide. The ultrasonic power is 100w, ultrasonic, centrifugal, and finally The supernatant liquid is extracted and dried to obtain polar graphene oxide powder; the graphene oxide powder prepared above and g-C3N4 are mixed with a high-energy ball mill for 180 minutes, and dispersed in hydrazine hydrate. The quality of graphene oxide and hydrazine hydrate The ratio is 10:10. The mixed system was transferred to a polytetrafluoroethylene lined autoclave, and reacted at 200°C for 3 hours. T...

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 relates to a preparation method of a graphene / g-C3N4 compound photocatalyst, and adopts a high temperature decomposition method to prepare the graphene / g-C3N4 compound photocatalyst. The method comprises the following steps of (1) preparing g-C3N4 powder by adopting concentrated hydrochloric acid melamine through high temperature decomposition; (2) synthesizing high specific surface area graphite oxide by adopting an improved Hummers method, stripping the graphite oxide in an ultrasound manner, removing the graphene with the low oxidation degree through centrifugation, finally extracting a supernatant liquid, drying, and preparing polarity graphene oxide powder; and (3) uniformly mixing the prepared graphene oxide powder and the g-C3N4 through a high energy ball grinder to dissolve in hydrazine hydrate, and preparing the graphene / g-C3N4 compound photocatalyst with a high photocatalytic activity. The preparation method provided by the invention has the advantages that a raw material is cheap, the technology is simple and convenient and the like, and the prepared compound photocatalyst has the wide application prospect on the fields such as wastewater treatment and gas purification.

Description

Technical field [0001] The invention relates to a preparation method of graphene / g-C3N4 composite photocatalyst, belonging to the field of new energy photocatalytic materials. Background technique [0002] Photocatalysts have become an ideal environmental pollution control and clean energy utilization and production technology due to their advantages of deep room temperature reactions and the ability to directly or indirectly use solar energy to drive reactions. Traditional photocatalyst TiO 2 Because its spectral response is in the ultraviolet region and the photogenerated carriers are easily recombined, the quantum efficiency of ZnO is low, which restricts its utilization of solar energy and photocatalytic efficiency. People are gradually turning their attention to the development of new photocatalysts with higher quantum efficiency. [0003] g-C3N4, the graphite-like phase C3N4, is a new type of photocatalyst that has attracted people's attention due to its good chemica...

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): B01J27/24
Inventor 董海军杨玉晴徐德善
Owner JIANGSU YUEDA NEW MATERIALS 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