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The surface plasmon resonance, thermal, support and size effect induced photocatalytic activity enhancement of Au/reduced graphene oxide for selective oxidation of benzylic alcohols

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Abstract

Reduced graphene oxide (RGO) as an electron-conductive medium and photosensitizer have been widely used to construct efficient RGO/semiconductor photocatalysts for solar energy conversion; however, the role of RGO has been largely underestimated. Herein, the surface plasmon resonance (SPR) effect, thermal effect, support effect, and size effect of Au/RGO are demonstrated to play important roles in enhancing the photocatalytic activity, which has not been considered previously. Au/RGO nanocomposites, synthesized via a facile wet chemistry route, exhibit an excellent visible light photocatalytic performance for selective oxidation of benzylic alcohols. A collection of joint techniques and control experiments have been employed to explain the SPR effect, thermal effect, support effect, and size effect over the Au/RGO photocatalyst. The possible reaction mechanism for the photocatalytic and thermocatalytic selective oxidation of alcohols over Au/RGO has also been discussed.

Graphical abstract: The surface plasmon resonance, thermal, support and size effect induced photocatalytic activity enhancement of Au/reduced graphene oxide for selective oxidation of benzylic alcohols

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The article was received on 08 Aug 2017, accepted on 07 Nov 2017 and first published on 07 Nov 2017


Article type: Paper
DOI: 10.1039/C7CP05378A
Citation: Phys. Chem. Chem. Phys., 2017, Advance Article
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    The surface plasmon resonance, thermal, support and size effect induced photocatalytic activity enhancement of Au/reduced graphene oxide for selective oxidation of benzylic alcohols

    Y. Zhang, H. Guo, W. Weng and M. Fu, Phys. Chem. Chem. Phys., 2017, Advance Article , DOI: 10.1039/C7CP05378A

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