Two-dimensional gersiloxenes with tunable bandgap for photocatalytic H2 evolution and CO2 photoreduction to CO

Fulai Zhao, Yiyu Feng (), Yu Wang, Xin Zhang, Xuejing Liang, Zhen Li, Fei Zhang, Tuo Wang, Jinlong Gong and Wei Feng ()
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Fulai Zhao: Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials
Yiyu Feng: Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials
Yu Wang: Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials
Xin Zhang: Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials
Xuejing Liang: Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials
Zhen Li: Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials
Fei Zhang: Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials
Tuo Wang: Tianjin University
Jinlong Gong: Tianjin University
Wei Feng: Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials

Nature Communications, 2020, vol. 11, issue 1, 1-13

Abstract: Abstract The discovery of graphene and graphene-like two-dimensional materials has brought fresh vitality to the field of photocatalysis. Bandgap engineering has always been an effective way to make semiconductors more suitable for specific applications such as photocatalysis and optoelectronics. Achieving control over the bandgap helps to improve the light absorption capacity of the semiconductor materials, thereby improving the photocatalytic performance. This work reports two-dimensional −H/−OH terminal-substituted siligenes (gersiloxenes) with tunable bandgap. All gersiloxenes are direct-gap semiconductors and have wide range of light absorption and suitable band positions for light driven water reduction into H2, and CO2 reduction to CO under mild conditions. The gersiloxene with the best performance can provide a maximum CO production of 6.91 mmol g−1 h−1, and a high apparent quantum efficiency (AQE) of 5.95% at 420 nm. This work may open up new insights into the discovery, research and application of new two-dimensional materials in photocatalysis.

Date: 2020
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DOI: 10.1038/s41467-020-15262-4

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