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

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

doi:10.1016/j.jechem.2024.07.007

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

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

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

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 oxygen vacancies is designed for photocatalytic CO₂ reduction, which exhibits excellent CO₂ reduction activity, with a C₂ 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/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 valuable for the development of photocatalysts.

Original language	English
Pages (from-to)	714-720
Number of pages	7
Journal	Journal of Energy Chemistry
Volume	98
DOIs	https://doi.org/10.1016/j.jechem.2024.07.007
State	Published - Nov 2024

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 13 Climate Action

Keywords

C product
Charge separation
Heterojunction
Oxygen vacancy
Photocatalytic CO reduction

Access to Document

10.1016/j.jechem.2024.07.007

Cite this

@article{ad674528cabc4c0bb1dc108e597f1c56,

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

abstract = "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 oxygen vacancies is designed for photocatalytic CO2 reduction, which exhibits excellent CO2 reduction activity, with a C2 selectivity of 56.66\% (in terms of Relectron). 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 valuable for the development of photocatalysts.",

keywords = "C product, Charge separation, Heterojunction, Oxygen vacancy, Photocatalytic CO reduction",

author = "Mengfang Liang and Xiaodong Shao and Choi, \{Ji Yoon\} and Kim, \{Young Dok\} and Tran, \{Trang Thu\} and Jeongyong Kim and Yosep Hwang and Kim, \{Min Gyu\} and Yunhee Cho and Sophia Akhtar and Hyoyoung Lee",

note = "Publisher Copyright: {\textcopyright} 2024 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences",

year = "2024",

month = nov,

doi = "10.1016/j.jechem.2024.07.007",

language = "English",

volume = "98",

pages = "714--720",

journal = "Journal of Energy Chemistry",

issn = "2095-4956",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Modified TiO2/In2O3 heterojunction with efficient charge separation for visible-light-driven photocatalytic CO2 reduction to C2 product

AU - Liang, Mengfang

AU - Shao, Xiaodong

AU - Choi, Ji Yoon

AU - Kim, Young Dok

AU - Tran, Trang Thu

AU - Kim, Jeongyong

AU - Hwang, Yosep

AU - Kim, Min Gyu

AU - Cho, Yunhee

AU - Akhtar, Sophia

AU - Lee, Hyoyoung

PY - 2024/11

Y1 - 2024/11

N2 - 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 oxygen vacancies is designed for photocatalytic CO2 reduction, which exhibits excellent CO2 reduction activity, with a C2 selectivity of 56.66% (in terms of Relectron). 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 valuable for the development of photocatalysts.

AB - 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 oxygen vacancies is designed for photocatalytic CO2 reduction, which exhibits excellent CO2 reduction activity, with a C2 selectivity of 56.66% (in terms of Relectron). 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 valuable for the development of photocatalysts.

KW - C product

KW - Charge separation

KW - Heterojunction

KW - Oxygen vacancy

KW - Photocatalytic CO reduction

UR - https://www.scopus.com/pages/publications/85200134685

U2 - 10.1016/j.jechem.2024.07.007

DO - 10.1016/j.jechem.2024.07.007

M3 - Article

AN - SCOPUS:85200134685

SN - 2095-4956

VL - 98

SP - 714

EP - 720

JO - Journal of Energy Chemistry

JF - Journal of Energy Chemistry

ER -