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Green hydrothermal synthesis of CeO2 NWs–reduced graphene oxide hybrid with enhanced photocatalytic activity

Published online by Cambridge University Press:  19 February 2014

K. Huang ,
M. Lei ,
Y.J. Wang ,
C. Liang ,
C.X. Ye ,
X.S. Zhao ,
Y.F. Li ,
R. Zhang ,
D.Y. Fan  and
Y.G. Wang
K. Huang
Affiliation:
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, People's Republic of China School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, People's Republic of China
M. Lei*
Affiliation:
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, People's Republic of China School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, People's Republic of China
Y.J. Wang
Affiliation:
School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, People's Republic of China
C. Liang
Affiliation:
School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, People's Republic of China
C.X. Ye
Affiliation:
School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, People's Republic of China
X.S. Zhao
Affiliation:
School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, People's Republic of China
Y.F. Li
Affiliation:
School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, People's Republic of China
R. Zhang
Affiliation:
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, People's Republic of China School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, People's Republic of China
D.Y. Fan
Affiliation:
School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, People's Republic of China
Y.G. Wang
Affiliation:
School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, People's Republic of China
*
a) Author to whom correspondence should be addressed. Electronic mail: mlei@bupt.edu.cn
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Abstract

In this study, CeO2 nanowires–reduced graphene oxide hybrids (CeO2 NWs–RGO) were synthesized by a green hydrothermal method using CeO2 NWs and graphene oxide (GO) as raw materials. During the process of reduction of GO, hydrothermal condition with supercritical water provides thermal and chemical factors to synthesize RGO. The photocatalytic experimental results show that the CeO2 NWs–RGO hybrids exhibit enhanced photocatalytic activity for degradation of Rhodamine B (RhB) under UV-light irradiation. It is found that the degree of photocatalytic activity enhancement strongly depends on the mass ratio of RGO in the hybrids, and the remarkable photocatalytic activity is 20 times that of pristine CeO2 NWs when the loading amount of RGO is 8.0 wt%. The enhancement of photocatalytic activity can be attributed to the excellently elevated absorption ability for the dye through π–π conjugation as well as the effective inhibition of the recombination of photogenerated electrons because of the electronic interaction between CeO2 NWs and RGO sheets.

Keywords

Green hydrothermal methodCeO2 NWsreduced graphene oxidephotocatalysis
Type
Technical Articles
Information
Powder Diffraction , Volume 29 , Issue 1 , March 2014 , pp. 8 - 13
Copyright
Copyright © International Centre for Diffraction Data 2014 

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