Modified TiO_(2)/In_(2)O_(3) heterojunction with efficient charge separation for visible-light-driven photocatalytic CO_(2) reduction to C_(2) product  

作　　者：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 

机构地区：[1]Department of Chemistry,Sungkyunkwan University(SKKU),Suwon 16419,Republic of Korea [2]CO_(2) to Multicarbon Production Center,Sungkyunkwan University,Suwon 16419,Republic of Korea [3]Institute for Quantum Biophysics(IQB),Sungkyunkwan University,Suwon 16419,Republic of Korea [4]Creative Research Institute,Sungkyunkwan University,Suwon 16419,Republic of Korea [5]Beamline Research Division,Pohang Accelerator Laboratory(PAL),Pohang University of Science and Technology,Pohang 37673,Republic of Korea [6]Department of Energy Science,Sungkyunkwan University,Suwon 16419,Republic of Korea

出　　处：《Journal of Energy Chemistry》2024年第11期714-720,共7页能源化学（英文版）

基　　金：National Research Foundation (NRF) of Korea grant funded by the Korea Government (MSIT) (NRF-2022R1A2C2093415);partially funding from the Circle Foundation (Republic of Korea) (Grant Number: 2023 TCF Innovative Science Project-03));partially Korea Basic Science Institute (National Research Facilities and Equipment Center) grant funded by the Ministry of Education (2022R1A6C101A751)。

摘　　要：Utilizing sunlight to convert CO_(2) 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 CO_(2) conversion.Herein,a modified TiO_(2)/In_(2)O_(3)(R-P2 5/In_(2)O_(3-x)) type Ⅱ heterojunction composite with oxygen vacancies is designed for photocatalytic CO_(2) reduction,which exhibits excellent CO_(2) reduction activity,with a C_(2) selectivity of 56.66%(in terms of R_(electron)).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/In_(2)O_(3-x) composite shows a remarkable behavior for coupling C-C bonds.Besides,efficient charge separation contributes to the improved CO_(2) conversion performance of photocatalysts.This work introduces a type Ⅱ heterojunction composite photocatalyst,which promotes understanding the CO_(2) reduction mechanisms on heterojunction composites and is valuable for the development of photocatalysts.

关 键 词：HETEROJUNCTION Oxygen vacancy Photocatalytic CO_(2)reduction C_(2)product Charge separation 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学] X701[环境科学与工程—环境工程]