More effective use of graphene in photocatalysis by conformal attachment of small sheets to TiO2 spheres

Graphene-pasted TiO2 spheres have been prepared successfully by a two-step method including attaching relatively small graphene oxide sheets onto the surface of the modified TiO2 spheres and in-situ photocatalysis reduction of these graphene oxide sheets. Since coated almost totally on the surface o...

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Bibliographic Details
Published in:Carbon (New York) 2016-01, Vol.96, p.394-402
Main Authors: Xu, Chao, Zhu, Jiaoli, Yuan, Rusheng, Fu, Xianzhi
Format: Article
Language:English
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Summary:Graphene-pasted TiO2 spheres have been prepared successfully by a two-step method including attaching relatively small graphene oxide sheets onto the surface of the modified TiO2 spheres and in-situ photocatalysis reduction of these graphene oxide sheets. Since coated almost totally on the surface of TiO2 spheres, these added graphene sheets are utilized more fully in these as-obtained graphene-pasted composites, which possess more interfaces between graphene and TiO2 and can make better use of the irradiated light compared with that of traditional graphene-involved TiO2 composites. As a result, these graphene-pasted TiO2 spheres always display higher photocatalysis activity in both methylene orange dye degradation and 4-nitrophenol reduction than that of control graphene-TiO2 spheres in the case of the same usage of these carbon sheets, which indicates more efficient use of graphene sheets in these graphene-pasted samples in photocatalysis systems. [Display omitted]
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2015.09.088