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Issue 12, 2014
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Tuning the surface charge of graphene for self-assembly synthesis of a SnNb2O6 nanosheet–graphene (2D–2D) nanocomposite with enhanced visible light photoactivity

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Abstract

A two-dimensional (2D) SnNb2O6 nanosheet–graphene (SnNb2O6–GR) nanocomposite featuring a typical 2D–2D structure has been synthesized via a simple surface charge modified self-assembly approach. The method is afforded by electrostatic attractive interaction between negatively charged SnNb2O6 nanosheets and modified graphene nanosheets with a positively charged surface in an aqueous solution. The SnNb2O6–GR nanocomposite exhibits a distinctly enhanced visible light photocatalytic performance toward degradation of organic dye in water as compared to blank SnNb2O6 nanosheets. The enhanced photoactivity is attributed to the integrated factors of the intimate interfacial contact and unique 2D–2D morphology associated with SnNbO6 and GR, which are beneficial for harnessing the electron conductivity of GR, facilitating the transfer and separation of photogenerated charge carriers over SnNbO6–GR upon visible light irradiation, and thereby contributing to the photoactivity enhancement. It is hoped that this work could enrich the facile, efficient fabrication of various 2D–2D semiconductor nanosheet–graphene composite photocatalysts toward target photocatalytic applications.

Graphical abstract: Tuning the surface charge of graphene for self-assembly synthesis of a SnNb2O6 nanosheet–graphene (2D–2D) nanocomposite with enhanced visible light photoactivity

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Publication details

The article was received on 08 Jan 2014, accepted on 26 Mar 2014 and first published on 01 Apr 2014


Article type: Paper
DOI: 10.1039/C4NR00116H
Citation: Nanoscale, 2014,6, 6335-6345
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    Tuning the surface charge of graphene for self-assembly synthesis of a SnNb2O6 nanosheet–graphene (2D–2D) nanocomposite with enhanced visible light photoactivity

    L. Yuan, M. Yang and Y. Xu, Nanoscale, 2014, 6, 6335
    DOI: 10.1039/C4NR00116H

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