Citation: Qing Gao, Lei Sun, Zhihua Wang, Jiguang Deng. Cubic S/N co-doped TiO₂ with rich oxygen vacancies from Ti-MOFs for efficient elimination of formaldehyde[J]. Chinese Chemical Letters, ;2024, 35(2): 109255. doi: 10.1016/j.cclet.2023.109255 shu

Cubic S/N co-doped TiO₂ with rich oxygen vacancies from Ti-MOFs for efficient elimination of formaldehyde

Qing Gao ^{a, 1} ,
Lei Sun ^{a, 1} ,
Zhihua Wang ^{a, *,} ,
Jiguang Deng ^{b, *,}

a.
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
b.
Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Department of Chemical Engineering, Beijing University of Technology, Beijing 100124, China

zhwang@mail.buct.edu.cn

jgdeng@bjut.edu.cn

Received Date: 3 February 2023
Revised Date: 26 October 2023
Accepted Date: 26 October 2023
Available Online: 28 October 2023

Figures(4)

The cubic S/N co-doped TiO₂ (TNSx, x is the calcination temperature) photocatalysts with rich oxygen vacancies were obtained by high temperature calcination of sulfur powder and titanium-based MOFs NH₂-MIL-125 for the photocatalytic removal of gaseous formaldehyde (a volatile organic compound). Among the obtained catalysts, the presence of oxygen vacancies restricted photogenerated electron and holes recombination. 98.00% removal of gaseous formaldehyde in 150 min could be achieved over TNS600 by xenon lamp. The removal efficiency for formaldehyde was well retained for five cycle experiment. The results from PL, TRPL and EIS revealed that TNS600 had the best separation efficiency of photogenerated electrons and holes, and the enhanced charge separation led to a significant increase in photocatalytic activity. The photocatalytic oxidation mechanism indicated that the ^•OH and ^•O₂⁻ radicals were mainly involved in the efficient elimination of gaseous formaldehyde and were able to mineralize formaldehyde to H₂O and CO₂.
- Metal-organic frameworks,
- Photocatalysis,
- Formaldehyde removal,
- S/N co-doped TiO₂,
- Oxygen vacancies
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Cubic S/N co-doped TiO2 with rich oxygen vacancies from Ti-MOFs for efficient elimination of formaldehyde

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通讯作者: 陈斌, bchen63@163.com

Cubic S/N co-doped TiO₂ with rich oxygen vacancies from Ti-MOFs for efficient elimination of formaldehyde