Improved Photocatalytic Activity of Porous In2O3 by co-Modifying Nanosized CuO and Ag with Synergistic Effects

doi:10.1007/s40242-020-0311-z

高等学校化学研究 ›› 2020, Vol. 36 ›› Issue (6): 1116-1121.doi: 10.1007/s40242-020-0311-z

Improved Photocatalytic Activity of Porous In₂O₃ by co-Modifying Nanosized CuO and Ag with Synergistic Effects

LI Xianglin, ZHANG Qingyang, LI Bin, LI Zhijun, ZHANG Ziqing, JING Liqiang

Laboratory of Functional Inorganic Materials Chemistry, Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Heilongjiang University, Harbin 150080, P. R. China

收稿日期:2020-09-30 修回日期:2020-11-10 出版日期:2020-12-01 发布日期:2020-11-11
通讯作者: ZHANG Ziqing, JING Liqiang E-mail:2018048@hlju.edu.cn;jinglq@hlju.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China(Nos.U1805255, 21905080) and the Basic Research Fund of Heilongjiang University, China(No.RCCXYJ201808).

Improved Photocatalytic Activity of Porous In₂O₃ by co-Modifying Nanosized CuO and Ag with Synergistic Effects

LI Xianglin, ZHANG Qingyang, LI Bin, LI Zhijun, ZHANG Ziqing, JING Liqiang

Laboratory of Functional Inorganic Materials Chemistry, Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Heilongjiang University, Harbin 150080, P. R. China

Received:2020-09-30 Revised:2020-11-10 Online:2020-12-01 Published:2020-11-11
Contact: ZHANG Ziqing, JING Liqiang E-mail:2018048@hlju.edu.cn;jinglq@hlju.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(Nos.U1805255, 21905080) and the Basic Research Fund of Heilongjiang University, China(No.RCCXYJ201808).

摘要/Abstract

摘要： Charge separation and oxygen activation are two crucial factors in the photocatalytic oxidation of pollutants, and it is meaningful to simultaneously enhance charge separation and promote O₂ activation. Herein, it is demonstrated that the photocatalytic activity of porous In₂O₃ is greatly improved after co-modifying nanosized CuO and Ag for oxidizing 2,4-dichlorophenol(2,4-DCP) and CO compared with that of individual In₂O₃. Based on the surface photovoltage spectroscopy, O₂ temperature-programmed desorption, electron paramagnetic resonance spectroscopy and electrochemical results, the improved photoactivity is mainly attributed to the synergistic effects of enhancing photogenerated charge separation and promoting oxygen activation by respectively coupled nanosized CuO and Ag. It is confirmed that the produced ^·O₂^- radicals are dominant to induce the photocatalytic oxidation of 2,4-DCP. This work offers an effective way to develop high-activity In₂O₃-based nanophotocatalysts for oxidizing pollutants.

关键词: Porous In₂O₃, Nanosized CuO and Ag co-modification, Charge separation, Oxygen activation, Photocatalytic pollutant oxidation

Abstract: Charge separation and oxygen activation are two crucial factors in the photocatalytic oxidation of pollutants, and it is meaningful to simultaneously enhance charge separation and promote O₂ activation. Herein, it is demonstrated that the photocatalytic activity of porous In₂O₃ is greatly improved after co-modifying nanosized CuO and Ag for oxidizing 2,4-dichlorophenol(2,4-DCP) and CO compared with that of individual In₂O₃. Based on the surface photovoltage spectroscopy, O₂ temperature-programmed desorption, electron paramagnetic resonance spectroscopy and electrochemical results, the improved photoactivity is mainly attributed to the synergistic effects of enhancing photogenerated charge separation and promoting oxygen activation by respectively coupled nanosized CuO and Ag. It is confirmed that the produced ^·O₂^- radicals are dominant to induce the photocatalytic oxidation of 2,4-DCP. This work offers an effective way to develop high-activity In₂O₃-based nanophotocatalysts for oxidizing pollutants.

Key words: Porous In₂O₃, Nanosized CuO and Ag co-modification, Charge separation, Oxygen activation, Photocatalytic pollutant oxidation

LI Xianglin, ZHANG Qingyang, LI Bin, LI Zhijun, ZHANG Ziqing, JING Liqiang. Improved Photocatalytic Activity of Porous In₂O₃ by co-Modifying Nanosized CuO and Ag with Synergistic Effects[J]. 高等学校化学研究, 2020, 36(6): 1116-1121.

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Improved Photocatalytic Activity of Porous In₂O₃ by co-Modifying Nanosized CuO and Ag with Synergistic Effects

Improved Photocatalytic Activity of Porous In₂O₃ by co-Modifying Nanosized CuO and Ag with Synergistic Effects

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