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Issue 16, 2014
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Charge separation in facet-engineered chalcogenide photocatalyst: a selective photocorrosion approach

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Abstract

Finding active sites for photocatalytic reduction and oxidation allows the mechanistic understanding of a given reaction, ensuring the rational design and fabrication of an efficient photocatalyst. Herein, using well-shaped Cu2WS4 decahedra as model photocatalysts, we demonstrated that photoinduced oxidative etching could be considered as an indication of the photooxidation reaction sites of chalcogenide photocatalyst as it only occurred on {101} facets of Cu2WS4 during photocatalytic hydrogen production. The photocatalytic reduction reaction, in contrast, was confined on its {001} facets. Based on this finding, the photocatalytic activity of Cu2WS4 decahedra could be further tailored by controlling the ratio of {001}/{101} facets. Thus, this work provides a general route to the determination of reactive sites on shaped chalcogenide photocatalysts.

Graphical abstract: Charge separation in facet-engineered chalcogenide photocatalyst: a selective photocorrosion approach

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Supplementary files

Article information


Submitted
16 Apr 2014
Accepted
08 Jun 2014
First published
10 Jun 2014

Nanoscale, 2014,6, 9695-9702
Article type
Paper
Author version available

Charge separation in facet-engineered chalcogenide photocatalyst: a selective photocorrosion approach

N. Li, M. Liu, Z. Zhou, J. Zhou, Y. Sun and L. Guo, Nanoscale, 2014, 6, 9695
DOI: 10.1039/C4NR02068E

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