首页|Modified TiO2/In2O3 heterojunction with efficient charge separation for visible-light-driven photocatalytic CO2 reduction to C2 product

Modified TiO2/In2O3 heterojunction with efficient charge separation for visible-light-driven photocatalytic CO2 reduction to C2 product

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Utilizing sunlight to convert CO2 into chemical fuels could address the greenhouse effect and fossil fuel crisis.Heterojunction structure catalysts with oxygen vacancy are attractive in the field of photocatalytic CO2 conversion.Herein,a modified TiO2/In2O3(R-P25/In2O3-x)type Ⅱ heterojunction composite with oxy-gen vacancies is designed for photocatalytic CO2 reduction,which exhibits excellent CO2 reduction activ-ity,with a C2 selectivity of 56.66％(in terms of Reiectron).In situ Fourier-transform infrared spectroscopy(DRIFTS)and time-resolved photoluminescence(TR-PL)spectroscopy are used to reveal the intermediate formation of the photocatalytic mechanism and photogenerated electron lifetime,respectively.The experimental characterizations reveal that the R-P25/In2O3-x composite shows a remarkable behavior for coupling C-C bonds.Besides,efficient charge separation contributes to the improved CO2 conversion performance of photocatalysts.This work introduces a type Ⅱ heterojunction composite photocatalyst,which promotes understanding the CO2 reduction mechanisms on heterojunction composites and is valu-able for the development of photocatalysts.

HeterojunctionOxygen vacancyPhotocatalytic CO2 reductionC2 productCharge separation

Mengfang Liang、Xiaodong Shao、Ji Yoon Choi、Young Dok Kim、Trang Thu Tran、Jeongyong Kim、Yosep Hwang、Min Gyu Kim、Yunhee Cho、Sophia Akhtar、Hyoyoung Lee

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Department of Chemistry,Sungkyunkwan University(SKKU),Suwon 16419,Republic of Korea

Department of Energy Science,Sungkyunkwan University,Suwon 16419,Republic of Korea

Beamline Research Division,Pohang Accelerator Laboratory(PAL),Pohang University of Science and Technology,Pohang 37673,Republic of Korea

CO2 to Multicarbon Production Center,Sungkyunkwan University,Suwon 16419,Republic of Korea

Institute for Quantum Biophysics(IQB),Sungkyunkwan University,Suwon 16419,Republic of Korea

Creative Research Institute,Sungkyunkwan University,Suwon 16419,Republic of Korea

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2024

10.1016/j.jechem.2024.07.007

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.98(11)