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Noble-metal-free nickel phosphide modified CdS@C3N4 nanorods for dramatically enhanced photocatalytic hydrogen evolution under visible light irradiation

Abstract

Photocatalytic hydrogen evolution is a promising technology in solving the global energy and environment issues. Therefore, it is urgent to develop high efficient, nonprecious and stable photocatalysts. In this work, we synthesized a high efficient Ni2P-CdS/g-C3N4 composite based on the concept of combining heterojunction engineering with co-catalyst modification. When employed as photocatalyst for water splitting, the obtained best composite (5% Ni2P-CdS/g-C3N4) displayed dramatically enhanced hydrogen evolution activity at the rate of 44450 μmol h-1 g-1, which was about 27 times higher than that of pure CdS (1668 μmol h-1 g-1). The apparent quantum yield at 420 nm reaches 46.3 %. The excellent photocatalytic activity and stability can be ascribed to the synergistic effect of the intimate contact between CdS and g-C3N4 and the surface co-catalyst modification. Specifically, the g-C3N4 coated on the CdS nanorods can effectively promote the electron hole pairs separation spatially and the Ni2P can lower the over potential of H+ reduction.

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Publication details

The article was received on 08 Aug 2017, accepted on 13 Sep 2017 and first published on 14 Sep 2017


Article type: Paper
DOI: 10.1039/C7DT02929B
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Noble-metal-free nickel phosphide modified CdS@C3N4 nanorods for dramatically enhanced photocatalytic hydrogen evolution under visible light irradiation

    T. wu, P. Wang, J. qian, Y. Ao, C. Wang and J. hou, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT02929B

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