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

Jing Yang ¹Juan Wang ¹Guohong Wang ¹Kai Wang ¹Jinmao Li ¹Li Zhao²

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作者信息

1. Hubei Key Laboratory of Pollutant Analysis and Reuse Technology,College of Chemistry and Chemical Engineering,Hubei Normal University,Huangshi 435002,China
2. Hubei Key Laboratory of Polymer Materials,School of Materials Science and Engineering,Hubei University,Wuhan 430062,China
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Abstract

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.

Key words

TiO2/Bi2S3/S-scheme heterojunction/Photocatalytic CO2 reduction/Photothermal effect

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基金项目

National Natural Science Foundation of China(52003079)

National Natural Science Foundation of China(22075072)

National Natural Science Foundation of China(52104254)

Hubei Provincial Natural Science Foundation of China(2021CFB569)

Hubei Provincial Natural Science Foundation of China(2023AFD027)

Hubei Provincial Natural Science Foundation of China(2021CFB242)

Hubei Key Laboratory of Pollutant Analysis & Reuse Technology Open Foundation(PA200206)

Hubei Key Laboratory of Pollutant Analysis & Reuse Technology Open Foundation(PA220208)

出版年

2024

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

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