High performance heterojunction photocatalytic membranes formed by embedding Cu2O and TiO2 nanowires in reduced graphene oxide

Wentai Wang; Zhiqing Wu; Ehsan Eftekhari; Ziyang Huo; Xiaomin Li; Moses O. Tade; Cheng Yan; Zifeng Yan; Chunhu Li; Qin Li; Dongyuan Zhao

doi:10.1039/C8CY00082D

High performance heterojunction photocatalytic membranes formed by embedding Cu₂O and TiO₂ nanowires in reduced graphene oxide†

Wentai Wang,

‡^ab Zhiqing Wu,

‡^b Ehsan Eftekhari,^b Ziyang Huo,^b Xiaomin Li,^bc Moses O. Tade,^d Cheng Yan,

^e Zifeng Yan,*^f Chunhu Li,*^a Qin Li

*^b and Dongyuan Zhao

^c

Author affiliations

* Corresponding authors

^a Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, China
E-mail: lichunhu@ouc.edu.cn

^b Queensland Micro- and Nanotechnology Centre, School of Engineering, Griffith University Nathan Campus, Brisbane, Australia
E-mail: qin.li@griffith.edu.au

^c Department of Chemistry, Fudan University, Shanghai, P.R. China

^d Department of Chemical Engineering, Curtin University, Perth, WA 6845, Australia

^e School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Australia

^f State Key Laboratory of Heavy Oil Processing Key Laboratory of CNPC, China University of Petroleum, Qingdao, China
E-mail: zfyancat@upc.edu.cn

Abstract

A heterojunction photocatalytic membrane consisting of Cu₂O and TiO₂ nanowires between reduced graphene oxide (rGO) sheets was fabricated using a facile process from a colloidal suspension. The resultant membrane exhibits significantly enhanced activity in the UV-vis range, surpassing nanowire dispersions, owing to the heterojunction formation and concurrent electron and hole transfer on rGO sheets. The membrane also possesses increased permeability and photocorrosion resistance. Such a design and fabrication method of an rGO-facilitated heterojunction photocatalytic membrane can be extended to a broad range of energy and environmental applications.

Catalysis Science & Technology

High performance heterojunction photocatalytic membranes formed by embedding Cu₂O and TiO₂ nanowires in reduced graphene oxide†

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High performance heterojunction photocatalytic membranes formed by embedding Cu₂O and TiO₂ nanowires in reduced graphene oxide

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