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Enhanced photocatalytic activity over a novel CuWO4/Cu1−x Zn x WO4/ZnWO4 hybrid material with sandwiched heterojunction

Published online by Cambridge University Press:  01 April 2016

Lijing Ma ,
Jinzhan Su ,
Maochang Liu ,
Longzhou Zhang ,
Yufeng Li  and
Liejin Guo
Lijing Ma
Affiliation:
International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China
Jinzhan Su*
Affiliation:
International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China
Maochang Liu
Affiliation:
International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China
Longzhou Zhang
Affiliation:
International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China
Yufeng Li
Affiliation:
International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China
Liejin Guo*
Affiliation:
International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China
*
a) Address all correspondence to these authors. e-mail: j.su@mail.xjtu.edu.cn
b) e-mail: lj-guo@mail.xjtu.edu.cn
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Abstract

A novel CuWO4/Cu1−x Zn x WO4/ZnWO4 hybrid photocatalyst with sandwiched heterojunction structure was prepared by a one-port synthesis with Zn doping into CuWO4. The crystalline structure, optical, and morphological properties as well as photocatalytic performance of the as-prepared hybrid photocatalyst were studied. By adjusting the amount of Zn doped, the optimal doping level was determined to be 0.1 wt% Zn2+. More than 80% photocataytic degradation of rhodamine B was achieved within 20 min over 0.1 wt% Zn2+ doped CuWO4, while only 20% was achieved for the pure CuWO4. The enhancement was proposed to be due to the formation of a CuWO4/Cu1−x Zn x WO4/ZnWO4 sandwiched heterojunction. Such tandem type heterojunction was found to be efficient for charge separation compared to traditional single heterojunction, which, in turn, resulted in a significantly enhanced photocatalytic activity. Our finding is also expected to be valuable for the exploration of CuWO4-material as a new group of efficient photocatalysts.

Keywords

compositenanostructuresustainability
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 11: Focus Issue: Advanced Materials and Structures for Solar Fuels , 14 June 2016 , pp. 1616 - 1621
Copyright
Copyright © Materials Research Society 2016 

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