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Issue 21, 2018
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Hydrogenated Cu2O\Au@CeO2 Z-scheme catalyst for photocatalytic oxidation of amines to imines

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Abstract

The design and fabrication of highly active visible light photocatalysts for organic synthesis reactions are particularly challenging for solar energy utilization and conversion. Herein, hydrogenated Z-scheme yolk–shell Cu2O\Au@CeO2 (H–Cu2O\Au@CeO2) photocatalysts were synthesized using cubic Cu2O as the starting core material via surface Au deposition and oxidation etching process, followed by hydrogenation treatment. When compared with CeO2, Cu2O@CeO2, and Cu2O@CeO2\Au nanocomposites, optimized H–Cu2O\Au@CeO2 showed remarkably higher visible light oxidation activity for the synthesis of imines from amines at ambient pressure and room temperature. The remarkably enhanced photoactivity of the H–Cu2O\Au@CeO2 composite mainly derives from the enhanced photoinduced charge separation efficiency, porous yolk–shell structure, proper surface defects, and well-maintained strong oxidation/reduction capabilities. The Z-scheme charge transfer process and photocatalytic reaction mechanism of the H–Cu2O\Au@CeO2 composites were also provided through spectral and photoelectrochemical analyses together with the investigation of structure and photocatalytic oxidation reactions. This study provides a probable approach for designing unique Z-scheme catalysts.

Graphical abstract: Hydrogenated Cu2O\Au@CeO2 Z-scheme catalyst for photocatalytic oxidation of amines to imines

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Publication details

The article was received on 14 Aug 2018, accepted on 13 Sep 2018 and first published on 03 Oct 2018


Article type: Paper
DOI: 10.1039/C8CY01689E
Citation: Catal. Sci. Technol., 2018,8, 5535-5543
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    Hydrogenated Cu2O\Au@CeO2 Z-scheme catalyst for photocatalytic oxidation of amines to imines

    Y. Liu, Y. Chen, W. Zhou, B. Jiang, X. Zhang and G. Tian, Catal. Sci. Technol., 2018, 8, 5535
    DOI: 10.1039/C8CY01689E

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