Issue 26, 2024

A band structure modulated 2D/2D ZnIn2S4@amorphous polymeric g-C3N4 S-scheme heterojunction for efficient photocatalytic reduction of CO2

Abstract

The use of solar energy to convert CO2 into solar fuels via photocatalytic reduction represents a promising technology to address climate change. Herein, a unique S-scheme heterojunction of 2D/2D ZnIn2S4 nanosheets@amorphous polymeric carbon nitride (ZIS@APCN) is developed by in situ growth of ZnIn2S4 nanosheets onto two-dimensional porous amorphous polymeric carbon nitride with a finely tuned band structure for photocatalytic reduction of CO2. Benefitting from ultra-thin two-dimensional and rigorous porous structures, notably enhanced CO2 adsorption and increased active surface area are ensured. Moreover, the formed S-scheme heterojunction effectively promotes charge separation. The optimized S-scheme heterojunction of ZIS@APCN yields a CO production rate as high as 1425 μmol g−1 h−1, surpassing pure APCN by ∼7.34 times and ZIS by ∼3.98 times. This work introduces a new approach to develop S-scheme heterojunction for efficient CO2 photoreduction by modulating the band structure.

Graphical abstract: A band structure modulated 2D/2D ZnIn2S4@amorphous polymeric g-C3N4 S-scheme heterojunction for efficient photocatalytic reduction of CO2

Supplementary files

Article information

Article type
Paper
Submitted
26 Mar 2024
Accepted
22 May 2024
First published
22 May 2024

J. Mater. Chem. A, 2024,12, 15693-15704

A band structure modulated 2D/2D ZnIn2S4@amorphous polymeric g-C3N4 S-scheme heterojunction for efficient photocatalytic reduction of CO2

H. Zhao, D. Wang, X. Xue, X. Zhu, D. Ye, Y. Yang, H. Wang, R. Chen and Q. Liao, J. Mater. Chem. A, 2024, 12, 15693 DOI: 10.1039/D4TA02001D

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