Issue 6, 2022

Synergistic effects in ultrafine amorphous InSxOy nanowires boost photocatalytic syngas production from CO2

Abstract

Visible-light-driven synthesis of syngas has been widely regarded as an ingenious strategy to realize the comprehensive utilization of CO2. Herein, a cooperative strategy based on S-atom substitution and morphology regulation was adopted to design ultrafine amorphous InSxOy nanowires (NWs) for boosting the photocatalytic production of the CO/H2 mixture. Surprisingly, the crystallinity and morphology of the products could be tuned easily by varying the amount of thiourea, which in turn influenced their photocatalytic activity. The as-prepared InSxOy NWs demonstrated remarkable production rates of 336 and 812 μmol g−1 h−1 for CO and H2, respectively, one of the most competitive performances for In-based materials. In situ Fourier transform infrared spectra confirmed that InSxOy NWs with strong CO2 capturing ability were conducive to the formation of the COOH* intermediate, accelerating the photoreduction efficiency significantly. Enhanced photocatalytic activity was ascribed to the synergistic effects of the distinctive ultrafine structure and S-atom substitution, which not only decreased the band gap of indium oxide but also promoted the charge–hole separation/transportation on the catalyst surface. This work emphasized a facile technique regarding heteroatom substitution and morphology regulation, inspiring an alternative pathway for fabricating photocatalysts with high-activity toward solar-driven syngas production.

Graphical abstract: Synergistic effects in ultrafine amorphous InSxOy nanowires boost photocatalytic syngas production from CO2

Supplementary files

Article information

Article type
Paper
Submitted
27 Nov 2021
Accepted
28 Dec 2021
First published
05 Jan 2022

J. Mater. Chem. A, 2022,10, 2924-2931

Synergistic effects in ultrafine amorphous InSxOy nanowires boost photocatalytic syngas production from CO2

Z. Zhao, Z. Liu, T. Wang, F. Teng, W. Jiang, J. Li, Z. Zhang and Y. Yang, J. Mater. Chem. A, 2022, 10, 2924 DOI: 10.1039/D1TA10162E

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