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Cu2O/Reduced Graphene Oxide Composites for the Photocatalytic Conversion of CO2

An, X; Li, K; Tang, J; (2014) Cu2O/Reduced Graphene Oxide Composites for the Photocatalytic Conversion of CO2. CHEMSUSCHEM , 7 (4) 1086 - 1093. 10.1002/cssc.201301194. Green open access

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Abstract

A facile one-step microwave-assisted chemical method has been successfully used for the synthesis of Cu2O/reduced graphene oxide (RGO) composites. Photocatalytic CO2 reduction was then investigated on the junction under ambient conditions. The RGO coating dramatically increases Cu2O activity for CO2 photoreduction to result in a nearly six times higher activity than the optimized Cu2O and 50 times higher activity than the Cu2O/RuOx junction in the 20th hour. Furthermore, an apparent initial quantum yield of approximately 0.34 % at 400 nm has been achieved by the Cu2O/RGO junction for CO2 photoreduction. The photocurrent of the junction is nearly double that of the blank Cu2O photocathode. The improved activity together with the enhanced stability of Cu2O is attributed to the efficient charge separation and transfer to RGO as well as the protection function of RGO, which was proved by XRD, SEM, TEM, X-ray photoelectron spectroscopy, photo-electrochemical, photoluminescence, and impedance characterizations. This study further presents useful information for other photocatalyst modification for efficient CO2 reduction without the need for a noble-metal co-catalyst.

Type: Article
Title: Cu2O/Reduced Graphene Oxide Composites for the Photocatalytic Conversion of CO2
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/cssc.201301194
Publisher version: http://dx.doi.org/10.1002/cssc.201301194
Additional information: ©� 2014 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution Non-Commercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. PubMed ID: 24574039
Keywords: carbon, copper, graphene, photosynthesis, reduction
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1431548
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