Citation: Lijun Liao, Yuhao Wang, Yanbo Li, Yingchun Chen, Ruting Yuan, Bo Wang, Tiancheng Zhuang, Guangquan Zhao, Wei Zhou. Synergy of electron-trapping centers and solid adsorption toward 100% suppression of toxic byproduct N₂O in photocatalytic NO reduction[J]. Chinese Chemical Letters, ;2026, 37(3): 111398. doi: 10.1016/j.cclet.2025.111398 shu

Synergy of electron-trapping centers and solid adsorption toward 100% suppression of toxic byproduct N₂O in photocatalytic NO reduction

Lijun Liao ^{a, 1} ,
Yuhao Wang ^{b, 1} ,
Yanbo Li ^c ,
Yingchun Chen ^a ,
Ruting Yuan ^{a, *,} ,
Bo Wang ^a ,
Tiancheng Zhuang ^a ,
Guangquan Zhao ^{a, *,} ,
Wei Zhou ^{a, *,}

a.
School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Ji'nan 250353, China
b.
School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China
c.
Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, Key Laboratory for Green Chemical Process of Ministry of Education, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430072, China

rutingyuan@qlu.edu.cn

gqzddup@163.com

zwchem@hotmail.com

Received Date: 7 December 2024
Revised Date: 6 April 2025
Accepted Date: 29 May 2025
Available Online: 29 May 2025

Figures(5)

Photocatalysis shows promising application in efficient reduction of nitrogen oxides (NO_x). However, the sluggish selectivity in nitric oxide removal with reductants, resulting in the formation of undesired N₂O byproducts, presents a great challenge. In this work, complete prohibition of nitric oxide generation in photo-removal of NO with carbon particulate is successfully achieved through the rational regulation of electron-trapping centers on TiO₂ nanosheets (TNS) surface achieved by the surface reduction treatment with NaBH₄. The efficient suppression (100%) of N₂O generation is ascribed to the more stable N₂O adsorption on the active (001) crystalline plane of TNS and the electron-capturing ability around oxygen vacancies based on the density functional theory (DFT) and experimental investigations. The existence of O₂ and H₂O effectively promote the photocatalytic activity of NO reduction but demonstrate no adverse effect on N₂O suppression. The optimal photocatalytic NO reduction activity with the highest CO₂ formation rate of 5.54 mg g⁻¹ h⁻¹ without N₂O formation is achieved over the optimized 0.135-TNS. These investigations guide the development of feasible photocatalytic treatment of air pollutants, emphasizing the significance of managing electron capture and gas adsorption for efficient byproduct control in pollutants removal.
- Photocatalysis,
- N₂O adsorption,
- Electron enrichment,
- Nitric oxide,
- Reduction
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沈阳化工大学材料科学与工程学院沈阳 110142

Synergy of electron-trapping centers and solid adsorption toward 100% suppression of toxic byproduct N2O in photocatalytic NO reduction

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通讯作者: 陈斌, bchen63@163.com

Synergy of electron-trapping centers and solid adsorption toward 100% suppression of toxic byproduct N₂O in photocatalytic NO reduction