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Issue 39, 2016
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Carbon dot and BiVO4 quantum dot composites for overall water splitting via a two-electron pathway

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Abstract

Carbon dot and BiVO4 quantum dot composites (CDs/BiVO4 QDs) show a significantly improved photocatalytic activity and high stability for overall water splitting. By using 5% CDs/BiVO4 QDs as photocatalysts, the H2 evolution of 0.92 μmol h−1, was achieved under solar light irradiation without any cocatalysts or sacrificial reagents, which is about 4 times that of BiVO4 QDs (0.21 μmol h−1). Note that, for the CD/BiVO4 QD catalyst, the produced H2 and O2 are approximately equal to the stoichiometric ratio (H2 : O2 = 1.80 : 1), while that of BiVO4 QDs is nonstoichiometric (about only 0.06 : 1). In addition, the present water splitting occurs via a two-electron pathway and CDs and BiVO4 QDs served as the reduction and oxidation reaction active sites, respectively.

Graphical abstract: Carbon dot and BiVO4 quantum dot composites for overall water splitting via a two-electron pathway

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Supplementary files

Article information


Submitted
25 Jul 2016
Accepted
31 Aug 2016
First published
31 Aug 2016

Nanoscale, 2016,8, 17314-17321
Article type
Paper

Carbon dot and BiVO4 quantum dot composites for overall water splitting via a two-electron pathway

X. Wu, J. Zhao, S. Guo, L. Wang, W. Shi, H. Huang, Y. Liu and Z. Kang, Nanoscale, 2016, 8, 17314
DOI: 10.1039/C6NR05864G

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