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Cu(2)O/Reduced Graphene Oxide Composites for the Photocatalytic Conversion of CO(2)

A facile one-step microwave-assisted chemical method has been successfully used for the synthesis of Cu(2)O/reduced graphene oxide (RGO) composites. Photocatalytic CO(2) reduction was then investigated on the junction under ambient conditions. The RGO coating dramatically increases Cu(2)O activity f...

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Autores principales: An, Xiaoqiang, Li, Kimfung, Tang, Junwang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: WILEY-VCH Verlag 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4204277/
https://www.ncbi.nlm.nih.gov/pubmed/24574039
http://dx.doi.org/10.1002/cssc.201301194
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author An, Xiaoqiang
Li, Kimfung
Tang, Junwang
author_facet An, Xiaoqiang
Li, Kimfung
Tang, Junwang
author_sort An, Xiaoqiang
collection PubMed
description A facile one-step microwave-assisted chemical method has been successfully used for the synthesis of Cu(2)O/reduced graphene oxide (RGO) composites. Photocatalytic CO(2) reduction was then investigated on the junction under ambient conditions. The RGO coating dramatically increases Cu(2)O activity for CO(2) photoreduction to result in a nearly six times higher activity than the optimized Cu(2)O and 50 times higher activity than the Cu(2)O/RuO(x) junction in the 20(th) hour. Furthermore, an apparent initial quantum yield of approximately 0.34 % at 400 nm has been achieved by the Cu(2)O/RGO junction for CO(2) photoreduction. The photocurrent of the junction is nearly double that of the blank Cu(2)O photocathode. The improved activity together with the enhanced stability of Cu(2)O 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 CO(2) reduction without the need for a noble-metal co-catalyst.
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spelling pubmed-42042772014-11-12 Cu(2)O/Reduced Graphene Oxide Composites for the Photocatalytic Conversion of CO(2) An, Xiaoqiang Li, Kimfung Tang, Junwang ChemSusChem Full Papers A facile one-step microwave-assisted chemical method has been successfully used for the synthesis of Cu(2)O/reduced graphene oxide (RGO) composites. Photocatalytic CO(2) reduction was then investigated on the junction under ambient conditions. The RGO coating dramatically increases Cu(2)O activity for CO(2) photoreduction to result in a nearly six times higher activity than the optimized Cu(2)O and 50 times higher activity than the Cu(2)O/RuO(x) junction in the 20(th) hour. Furthermore, an apparent initial quantum yield of approximately 0.34 % at 400 nm has been achieved by the Cu(2)O/RGO junction for CO(2) photoreduction. The photocurrent of the junction is nearly double that of the blank Cu(2)O photocathode. The improved activity together with the enhanced stability of Cu(2)O 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 CO(2) reduction without the need for a noble-metal co-catalyst. WILEY-VCH Verlag 2014-04 2014-02-26 /pmc/articles/PMC4204277/ /pubmed/24574039 http://dx.doi.org/10.1002/cssc.201301194 Text en © 2014 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. http://creativecommons.org/licenses/by-nc/3.0/ 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.
spellingShingle Full Papers
An, Xiaoqiang
Li, Kimfung
Tang, Junwang
Cu(2)O/Reduced Graphene Oxide Composites for the Photocatalytic Conversion of CO(2)
title Cu(2)O/Reduced Graphene Oxide Composites for the Photocatalytic Conversion of CO(2)
title_full Cu(2)O/Reduced Graphene Oxide Composites for the Photocatalytic Conversion of CO(2)
title_fullStr Cu(2)O/Reduced Graphene Oxide Composites for the Photocatalytic Conversion of CO(2)
title_full_unstemmed Cu(2)O/Reduced Graphene Oxide Composites for the Photocatalytic Conversion of CO(2)
title_short Cu(2)O/Reduced Graphene Oxide Composites for the Photocatalytic Conversion of CO(2)
title_sort cu(2)o/reduced graphene oxide composites for the photocatalytic conversion of co(2)
topic Full Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4204277/
https://www.ncbi.nlm.nih.gov/pubmed/24574039
http://dx.doi.org/10.1002/cssc.201301194
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AT likimfung cu2oreducedgrapheneoxidecompositesforthephotocatalyticconversionofco2
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