In situ irradiated XPS investigation on S-scheme TiO2/Bi2S3 photocatalyst with high interfacial charge separation for highly efficient photothermal catalytic CO2 reduction

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外文摘要：The combination of S-scheme heterojunction and photothermal effect is a promising strategy to achieve efficient CO2 photoreduction into solar fuel due to the boosted charge carrier separation efficiency and faster surface reaction rate.Herein,unique photothermal-coupled TiO2/Bi2S3 S-scheme heterojunction nanofibers were fabricated and applied to a full-spectrum CO2 photoreduction system.Density functional theory calculation and experimental analyses have confirmed the generation of the internal electric field and the S-scheme electron transfer pathway,leading to a highly efficient charge carrier separation.Thanks to the excellent photothermal conversion capacity of Bi2S3,the photogenerated electron transfer rate,and surface reaction rate were further accelerated in hybrid photocatalysts.Under the synergistic effect of S-scheme heterojunction and photothermal effects,the optimal TiO2/Bi2S3 nanofibers achieved 7.65 μmol h-1 of CH4 production rate,which is 5.24 times higher than that of pristine TiO2.Moreover,the mor-phology reconstruction of Bi2S3 in hybrids facilitates the CH4 selectivity was significantly improved from 64.2％to 88.7％.Meanwhile,the CO2 photoreduction reaction route over TiO2/Bi2S3 nanofibers was in-vestigated based on in-situ Fourier transform infrared spectra.This work provides some useful hints for designing highly efficient photothermal-coupled photocatalysts for CO2 photoreduction.

外文关键词：

TiO2/Bi2S3S-scheme heterojunctionPhotocatalytic CO2 reductionPhotothermal effect

作者：

Jing Yang、Juan Wang、Guohong Wang、Kai Wang、Jinmao Li、Li Zhao

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作者单位：

Hubei Key Laboratory of Pollutant Analysis and Reuse Technology,College of Chemistry and Chemical Engineering,Hubei Normal University,Huangshi 435002,China

Hubei Key Laboratory of Polymer Materials,School of Materials Science and Engineering,Hubei University,Wuhan 430062,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaHubei Provincial Natural Science Foundation of ChinaHubei Provincial Natural Science Foundation of ChinaHubei Provincial Natural Science Foundation of ChinaHubei Key Laboratory of Pollutant Analysis & Reuse Technology Open FoundationHubei Key Laboratory of Pollutant Analysis & Reuse Technology Open Foundation

项目编号：

5200307922075072521042542021CFB5692023AFD0272021CFB242PA200206PA220208

出版年：

2024

DOI：

10.1016/j.jmst.2023.11.065

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCD

影响因子：0.657

ISSN：1005-0302

年,卷(期)：2024.189(22)