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Antiphotocorrosive photocatalysts containing CdS nanoparticles and exfoliated TiO2 nanosheets

Published online by Cambridge University Press:  31 January 2011

Xiaoxia Yan ,
Gang Liu ,
Lianzhou Wang ,
Yong Wang ,
Xianfang Zhu ,
Jin Zou  and
Gao Qing (Max) Lu
Gang Liu
Affiliation:
Australian Research Council (ARC) Centre of Excellence for Functional Nanomaterials, School of Chemical Engineering and Australian Institute of Bioengineering and Nanotechnology, The University of Queensland, Qld 4072, Australia
Yong Wang
Affiliation:
Australian Research Council (ARC) Centre of Excellence for Functional Nanomaterials, School of Chemical Engineering and Australian Institute of Bioengineering and Nanotechnology, The University of Queensland, Qld 4072, Australia; and School of Engineering, The University of Queensland, Qld 4072, Australia
Xianfang Zhu
Affiliation:
China-Australia Joint Laboratory for Functional Nanomaterials, Department of Physics, Xiamen University, Xiamen, 361005 China
Jin Zou
Affiliation:
School of Engineering, The University of Queensland, Qld 4072, Australia
Gao Qing (Max) Lu*
Affiliation:
Australian Research Council (ARC) Centre of Excellence for Functional Nanomaterials, School of Chemical Engineering and Australian Institute of Bioengineering and Nanotechnology, The University of Queensland, Qld 4072, Australia
*
b)Address all correspondence to this author. e-mail: maxlu@uq.edu.au
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Abstract

Aimed at designing an efficient visible light active photocatalyst and suppressing the self-corrosion tendency of CdS nanoparticles, a novel composite consisting of CdS nanoparticles and exfoliated two-dimensional (2D) TiO2 nanosheets was successfully fabricated using a simple self-assembly process. The prepared samples were characterized using various techniques including x-ray diffraction, ultraviolet–visible absorption spectroscopy, x-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. It was found that the exfoliated 2D nanosheets played an important role as an ultrathin coating to suppress the photocorrosion of CdS nanoparticles, evidenced by inductively coupled plasma-atomic emission spectrometer analysis. The resultant CdS/TiO2 composites exhibited enhanced photocatalytic activity in the oxidation of Rhodamine B in water under visible light irradiation (λ > 420 nm).

Keywords

NanostructurePhotochemical
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 1: Photocatalysis for Energy and Environmental Sustainability , January 2010 , pp. 182 - 188
Copyright
Copyright © Materials Research Society 2010

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