Gas sensitization and photochromism of CaTiO3-δ for visible-light photocatalysis

Jingwen Chen; Chong Wang; Jibiao Li; Jiupai Ni; Yu Tang; John Thomas Sirr Irvine; Chengsheng Ni

doi:10.1016/j.cej.2022.140896

Gas sensitization and photochromism of CaTiO_3-δ for visible-light photocatalysis

Jingwen Chen, Chong Wang, Jibiao Li, Jiupai Ni, Yu Tang, John Thomas Sirr Irvine, Chengsheng Ni^*

^*Corresponding author for this work

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

Abstract

A wide bandgap CaTiO_3-δ (CTO) with oxygen vacancy (V_O) was prepared to investigate the sensitization or photochromism caused by the adsorbed gaseous species, and the resultant photocatalytic performance of CTO under visible light. The adsorption of CO₂ was able to produce an intermediate gap state in CTO according to the density-function-theory (DFT) calculations and was found to increase the light absorption peak at 482 nm (A₄₈₂). During photocatalytic NO oxidation in air, the V_O on the surface could enhance adsorption and further oxidation of NO₂ intermediates. Furthermore, the gas sensitization and photochromism of CTO contributed to the activation of O₂ in dry air. Our findings will help deepen the knowledge about the chemisorption of gaseous species in the electronic structural tunability of semiconductors and the resultant impact on the photocatalytic reaction at the gas/solid interface.

Original language	English
Article number	140896
Journal	Chemical Engineering Journal
Volume	455
Issue number	Part 2
Early online date	13 Dec 2022
DOIs	https://doi.org/10.1016/j.cej.2022.140896
Publication status	Published - 1 Jan 2023

Keywords

Photochromism
Oxygen vacancy
CO2 adsorption
NO removal efficiency
Heterojunction
Gas sensitization

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10.1016/j.cej.2022.140896

Chen_2022_CEJ_Gassensitization_AAM
Copyright © 2022 Elsevier B.V. All rights reserved. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1016/j.cej.2022.140896
Accepted author manuscript, 2.22 MBLicence: CC BY-NC-ND

Cite this

@article{fc6b17c9ce5f470689b36177bfebb937,

title = "Gas sensitization and photochromism of CaTiO3-δ for visible-light photocatalysis",

abstract = "A wide bandgap CaTiO3-δ (CTO) with oxygen vacancy (VO) was prepared to investigate the sensitization or photochromism caused by the adsorbed gaseous species, and the resultant photocatalytic performance of CTO under visible light. The adsorption of CO2 was able to produce an intermediate gap state in CTO according to the density-function-theory (DFT) calculations and was found to increase the light absorption peak at 482 nm (A482). During photocatalytic NO oxidation in air, the VO on the surface could enhance adsorption and further oxidation of NO2 intermediates. Furthermore, the gas sensitization and photochromism of CTO contributed to the activation of O2 in dry air. Our findings will help deepen the knowledge about the chemisorption of gaseous species in the electronic structural tunability of semiconductors and the resultant impact on the photocatalytic reaction at the gas/solid interface.",

keywords = "Photochromism, Oxygen vacancy, CO2 adsorption, NO removal efficiency, Heterojunction, Gas sensitization",

author = "Jingwen Chen and Chong Wang and Jibiao Li and Jiupai Ni and Yu Tang and Irvine, {John Thomas Sirr} and Chengsheng Ni",

note = "Funding: We would like to acknowledge the support from the National Key Research and Development Program of China (grant No. 2022YFD1601102), Natural Science Foundation of China (NSFC, 51702264, 41371275), the Fundamental Research Funds for the central universities (SWURC2020002). Funding from Chongqing Science and Technology Committee (cstc2021ycjh-bgzxm0162) is also acknowledged. CN also thanks the support of Bayu Young Scholar from Chongqing.",

year = "2023",

month = jan,

day = "1",

doi = "10.1016/j.cej.2022.140896",

language = "English",

volume = "455",

journal = "Chemical Engineering Journal",

issn = "1385-8947",

publisher = "Elsevier",

number = "Part 2",

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TY - JOUR

T1 - Gas sensitization and photochromism of CaTiO3-δ for visible-light photocatalysis

AU - Chen, Jingwen

AU - Wang, Chong

AU - Li, Jibiao

AU - Ni, Jiupai

AU - Tang, Yu

AU - Irvine, John Thomas Sirr

AU - Ni, Chengsheng

N1 - Funding: We would like to acknowledge the support from the National Key Research and Development Program of China (grant No. 2022YFD1601102), Natural Science Foundation of China (NSFC, 51702264, 41371275), the Fundamental Research Funds for the central universities (SWURC2020002). Funding from Chongqing Science and Technology Committee (cstc2021ycjh-bgzxm0162) is also acknowledged. CN also thanks the support of Bayu Young Scholar from Chongqing.

PY - 2023/1/1

Y1 - 2023/1/1

N2 - A wide bandgap CaTiO3-δ (CTO) with oxygen vacancy (VO) was prepared to investigate the sensitization or photochromism caused by the adsorbed gaseous species, and the resultant photocatalytic performance of CTO under visible light. The adsorption of CO2 was able to produce an intermediate gap state in CTO according to the density-function-theory (DFT) calculations and was found to increase the light absorption peak at 482 nm (A482). During photocatalytic NO oxidation in air, the VO on the surface could enhance adsorption and further oxidation of NO2 intermediates. Furthermore, the gas sensitization and photochromism of CTO contributed to the activation of O2 in dry air. Our findings will help deepen the knowledge about the chemisorption of gaseous species in the electronic structural tunability of semiconductors and the resultant impact on the photocatalytic reaction at the gas/solid interface.

AB - A wide bandgap CaTiO3-δ (CTO) with oxygen vacancy (VO) was prepared to investigate the sensitization or photochromism caused by the adsorbed gaseous species, and the resultant photocatalytic performance of CTO under visible light. The adsorption of CO2 was able to produce an intermediate gap state in CTO according to the density-function-theory (DFT) calculations and was found to increase the light absorption peak at 482 nm (A482). During photocatalytic NO oxidation in air, the VO on the surface could enhance adsorption and further oxidation of NO2 intermediates. Furthermore, the gas sensitization and photochromism of CTO contributed to the activation of O2 in dry air. Our findings will help deepen the knowledge about the chemisorption of gaseous species in the electronic structural tunability of semiconductors and the resultant impact on the photocatalytic reaction at the gas/solid interface.

KW - Photochromism

KW - Oxygen vacancy

KW - CO2 adsorption

KW - NO removal efficiency

KW - Heterojunction

KW - Gas sensitization

U2 - 10.1016/j.cej.2022.140896

DO - 10.1016/j.cej.2022.140896

M3 - Article

SN - 1385-8947

VL - 455

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

IS - Part 2

M1 - 140896

ER -