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Open Access Excellent visible light absorption by adopting mesoporous SiC in SiC/CdS for enhanced photocatalytic hydrogen generation

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The SiC/CdS semiconducting composites have been reported to show excellent synergistic effect for the photocatalytic water splitting to produce H2 (J. Mater. Chem. A (2014) 2:6296–6300). In this work, the mesoporous SiC prepared via a one-step nanocasting process has been adopted to replace the commercial micro-SiC, to improve the weak light absorption of SiC which suppresses the photocatalytic activity in previous literature. It has been demonstrated that the mesoporous SiC/CdS composite with suitable coverage ratio of SiC (with the molar ratio of SiC:CdS as 1:1) shows stronger light absorption and enhanced charge transfer rate. In consequence, the hydrogen evolution rate reaches 952 μmol · h–1· g–1 in the absence of noble metal co-catalyst, which is two times of the micro SiC/CdS system. Our work provides an effective route to enhance the photocatalysis in SiC-based heterojunction materials. This strategy can also be extended in other Z-scheme photocatalytic systems.

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Keywords: CDS; LIGHT ABSORPTION; MESOPOROUS MATERIALS; PHOTOCATALYTIC H2 PRODUCTION; SILICON CARBIDE

Document Type: Research Article

Publication date: February 1, 2019

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  • Materials Express is a peer-reviewed multidisciplinary journal reporting emerging researches on materials science, engineering, technology and biology. Cutting-edge researches on the synthesis, characterization, properties, and applications of a very wide range of materials are covered for broad readership; from physical sciences to life sciences. In particular, the journal aims to report advanced materials with interesting electronic, magnetic, optical, mechanical and catalytic properties for industrial applications.
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