Highly Efficient Visible-Light-Driven Photocatalytic Hydrogen Production on CdS/Cu7 S4 /g-C3 N4 Ternary Heterostructures

ACS Applied Materials & Interfaces
Jiayu ChuPing Xu

Abstract

Hydrogen production through photocatalytic water splitting has attracted much attention because of its potential to solve the issues of environmental pollution and energy shortage. In this work, CdS/Cu7S4/g-C3N4 ternary heterostructures are fabricated by ion exchange between CdS and Cu+ and subsequent ultrasonication-assisted self-assembly of CdS/Cu7S4 and g-C3N4, which provide excellent visible-light photocatalytic activity for hydrogen evolution without any noble metal cocatalyst. With the presence of p-n junction, tuned band gap alignments, and higher charge carrier density in the CdS/Cu7S4/g-C3N4 ternary heterostructures that can effectively promote the spatial separation and prolong the lifetime of photogenerated electrons, a high hydrogen evolution rate of 3570 μmol g-1 h-1, an apparent quantum yield of 4.4% at 420 nm, and remarkable recycling stability are achieved. We believe that the as-synthesized CdS/Cu7S4/g-C3N4 ternary heterostructures can be promising noble metal-free catalysts for enhanced hydrogen production from photocatalytic water splitting.

References

Jun 22, 2007·Journal of the American Chemical Society·Krista S Walton, Randall Q Snurr
Dec 18, 2008·Chemical Society Reviews·Akihiko Kudo, Yugo Miseki
Aug 2, 2016·Nano Letters·Fen QiuTodd D Krauss

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Citations

Jan 30, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Xin LiJinghai Yang
May 3, 2019·ACS Applied Materials & Interfaces·Jiayu ChuPing Xu

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