Citation: Zhiling Du, Zhiqi Zhou, Nan Sun, Cailiang Yue, Fuqiang Liu. Pyromellitic diimide induced TiO₂ mesocrystals with oxygen vacancies for synergistic photocatalytic H₂O₂ production and antibiotics degradation[J]. Chinese Chemical Letters, ;2026, 37(3): 111341. doi: 10.1016/j.cclet.2025.111341 shu

Pyromellitic diimide induced TiO₂ mesocrystals with oxygen vacancies for synergistic photocatalytic H₂O₂ production and antibiotics degradation

Zhiling Du ^a ,
Zhiqi Zhou ^a ,
Nan Sun ^a ,
Cailiang Yue ^{a, b} ,
Fuqiang Liu ^{a, b, *,}

a.
School of Environment, Nanjing University, Nanjing 210023, China
b.
Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Environmental Science and Engineering, Hainan University, Haikou 570228, China

lfq@nju.edu.cn

Received Date: 6 February 2025
Revised Date: 14 May 2025
Accepted Date: 16 May 2025
Available Online: 17 May 2025

Figures(5)

Photocatalytic H₂O₂ production has emerged as a promising strategy for solar-to-H₂O₂ energy conversion. However, the inevitable requirement for aeration or sacrificial agents poses great challenges for its further application, particularly in environmental remediation process. Previous works often struggles to simultaneously balance the antibiotics degradation and H₂O₂ production. Herein, bifunctional TiO₂ mesocrystal with oxygen vacancy (meso–TiO_2-x) was prepared through a facile pyromellitic diimide assisted hydrothermal process. The well-aligned meso–TiO_2-x superstructures with unique oxygen vacancies on the surface collectively facilitated the direct h⁺ oxidation and oxygen reduction reaction (ORR). The ciprofloxacin degradation through direct h⁺ oxidation boosted the separation of photogenerated carriers, which enhances the e- participation in ORR, resulting H₂O₂ production rate up to 904.2 µmol g⁻¹ h⁻¹. This work provides an ingenious strategy of constructing bifunctional catalyst to achieve synergistic antibiotics degradation and H₂O₂ production without the addition of exogenous reagents.
- Photocatalysis,
- Oxygen vacancy,
- Mesocrystal,
- Hydrogen peroxide,
- Antibiotics
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Pyromellitic diimide induced TiO2 mesocrystals with oxygen vacancies for synergistic photocatalytic H2O2 production and antibiotics degradation

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通讯作者: 陈斌, bchen63@163.com

Pyromellitic diimide induced TiO₂ mesocrystals with oxygen vacancies for synergistic photocatalytic H₂O₂ production and antibiotics degradation