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One-step synthesis of CoO/g-C3N4 composites by thermal decomposition for overall water splitting without sacrificial reagents

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Abstract

Using photocatalysts to split water into hydrogen and oxygen is a promising way to produce renewable energy. Efficient and stable photocatalysts are desired for overall water splitting under visible light. We demonstrate that the cobalt(II) oxide (CoO)/graphitic carbon nitride (CoO/g-C3N4) composites synthesized by a one-step thermal decomposition method exhibit enhanced photocatalytic efficiency for overall water splitting without sacrificial reagents. 10%CoO/g-C3N4 exhibits optimal photocatalytic performance, where H2 and O2 evolution rates are, respectively, 0.46 μmol h−1 and 0.21 μmol h−1 under visible light irradiation without any sacrificial reagents. It is worth mentioning that the H2 and O2 production almost approaches the stoichiometric ratio 2 : 1. The enhanced photocatalytic activity of CoO/g-C3N4 may be ascribed to the efficient charge separation and fast decomposition of H2O2 by CoO.

Graphical abstract: One-step synthesis of CoO/g-C3N4 composites by thermal decomposition for overall water splitting without sacrificial reagents

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Publication details

The article was received on 04 Jul 2017, accepted on 22 Aug 2017 and first published on 23 Aug 2017


Article type: Research Article
DOI: 10.1039/C7QI00380C
Citation: Inorg. Chem. Front., 2017, Advance Article
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    One-step synthesis of CoO/g-C3N4 composites by thermal decomposition for overall water splitting without sacrificial reagents

    M. Han, H. Wang, S. Zhao, L. Hu, H. Huang and Y. Liu, Inorg. Chem. Front., 2017, Advance Article , DOI: 10.1039/C7QI00380C

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