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Enhanced photocatalytic degradation of methylene blue under visible irradiation on graphene@TiO2 dyade structure

Paper ID Volume ID Publish Year Pages File Format Full-Text
46476 46440 2012 6 PDF Available
Title
Enhanced photocatalytic degradation of methylene blue under visible irradiation on graphene@TiO2 dyade structure
Abstract

Electron–hole recombination limits the efficiency of TiO2. We have investigated the efficacy with which the graphene@TiO2 “dyade”-like structure reduced charge recombination and enhanced reactivity. A visible-light photocatalysis of graphene@TiO2 “dyade”-like structure was synthesized, and photocatalytic degradation of organic compounds over the UV and visible-light spectrum regions was investigated. The graphene@TiO2 had anatase phase and was able to absorb a high amount of photo energy in the visible-light region, driving effectively photochemical degradation reactions. There were more OH radicals produced by the graphene@TiO2 (1:3) than by pure TiO2 under UV and visible-light irradiation. Graphene can enhance the photocatalytic activity of TiO2 in two aspects, namely, e− transportation and adsorption. This work provides new insight into the fabrication of graphene@TiO2 as a high performance visible-light photocatalyst and facilitates its application in photocatalytic degradation of organic compounds.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights►A visible-light photocatalysis of graphene@TiO2 was synthesized. ►The graphene@TiO2 absorbed a high amount of photo energy in the visible-light region. ►There were more OH radicals produced by the graphene@TiO2 (1:3) than by pure TiO2 under UV and visible-light irradiation. ► Graphene can enhance the photocatalytic activity of TiO2.

Keywords
Graphene; Photocatalysis; TiO2; Degradation
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Enhanced photocatalytic degradation of methylene blue under visible irradiation on graphene@TiO2 dyade structure
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 111–112, 12 January 2012, Pages 303–308
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us