Issue 3, 2021

Few-layered CuInP2S6 nanosheet with sulfur vacancy boosting photocatalytic hydrogen evolution

Abstract

Photochemical water splitting offers an economic and sustainable approach for solar energy conversion into hydrogen fuel to mitigate the problem of greenhouse gas emissions. To this end, exploring novel semiconductor photocatalysts, which have efficient light absorption and thermodynamically favorable band alignment for water splitting, is crucial. Here, we rationally develop a new photocatalyst of CuInP2S6 nanosheets to generate hydrogen gas under light illumination. The CuInP2S6 nanosheet (with a thickness of around 4–7 nm) photocatalyst exhibits a high hydrogen production rate of 804 μmol g−1 h−1, eight times higher than that of the microsheet counterpart, due to the introduced abundant sulfur vacancies. Experimental characterization and theoretical calculations verify that the prolonged carrier lifetime and optimized band alignment in ultrathin CuInP2S6 nanosheets boost photocatalytic hydrogen evolution. This work opens a new avenue for photocatalysis via using novel layered binary metal phosphorous trichalcogenides.

Graphical abstract: Few-layered CuInP2S6 nanosheet with sulfur vacancy boosting photocatalytic hydrogen evolution

Supplementary files

Article information

Article type
Paper
Submitted
12 okt 2020
Accepted
20 nov 2020
First published
23 nov 2020

CrystEngComm, 2021,23, 591-598

Few-layered CuInP2S6 nanosheet with sulfur vacancy boosting photocatalytic hydrogen evolution

P. Yu, F. Wang, J. Meng, T. A. Shifa, M. G. Sendeku, J. Fang, S. Li, Z. Cheng, X. Lou and J. He, CrystEngComm, 2021, 23, 591 DOI: 10.1039/D0CE01487G

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