Enhanced photocatalytic properties of graphene oxide/ZnO nanohybrid by Mg dopants

Author: Chen C S   Xie X D   Cao S Y   Liu T G   Tsang Y H   Xiao Y   Liu Q C   Yang X F   Gong L  

Publisher: IOP Publishing

E-ISSN: 1402-4896|90|2|25806-25812

ISSN: 1402-4896

Source: Physica Scripta, Vol.90, Iss.2, 2015-02, pp. : 25806-25812

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Abstract

In this study, the enhancement of photocatalytic activity of a graphene oxide/ZnO (GO/ZnO) nanohybrid was achieved via introducing Mg as a co-dopant element by the co-precipitation method. The Mg-doped ZnO nanoparticles were adsorbed on GO sheets. Compared with the catalyses with GO/ZnO nanohybrids, GO/Zn1−xMgxO nanohybrids exhibited better photocatalytic activity, in which the decomposition rate of methyl orange (MO) reached 100% within 60 min. The enhancement is attributed to Mg-doping and efficient charge transfer of the photogenerated electrons in the conduction band of ZnO to graphene.