Citation: Hui Wang, Haodong Ji, Dandan Zhang, Xudong Yang, Hanchun Chen, Chunqian Jiang, Weiliang Sun, Jun Duan, Wen Liu. Solar-light-driven photocatalytic degradation and detoxification of ciprofloxacin using sodium niobate nanocubes decorated g-C₃N₄ with built-in electric field[J]. Chinese Chemical Letters, ;2025, 36(5): 110200. doi: 10.1016/j.cclet.2024.110200 shu

Solar-light-driven photocatalytic degradation and detoxification of ciprofloxacin using sodium niobate nanocubes decorated g-C₃N₄ with built-in electric field

Hui Wang ^a ,
Haodong Ji ^{b, c, *,} ,
Dandan Zhang ^{c, d} ,
Xudong Yang ^c ,
Hanchun Chen ^b ,
Chunqian Jiang ^{e, *,} ,
Weiliang Sun ^c ,
Jun Duan ^c ,
Wen Liu ^{c, f, g, *,}

a.
Key Laboratory of Tree Breeding and Cultivation of National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
b.
Eco-environment and Resource Efficiency Research Laboratory, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
c.
The Key Laboratory of Water and Sediment Sciences, Ministry of Education; College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
d.
Department of Energy, Environmental, and Chemical Engineering, Washington University, St. Louis, MO 63130, United States
e.
Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
f.
School of Environmental Engineering, Wuhan Textile University, Engineering Research Centre for Clean Production of Textile Dyeing and Printing, Ministry of Education, Wuhan 430073, China
g.
Beijing National Laboratory for Molecular Sciences, Peking University, Beijing 100871, China

jihaodong@pku.edu.cn

jiangchq@caf.ac.cn

wen.liu@pku.edu.cn

Received Date: 12 March 2024
Revised Date: 14 June 2024
Accepted Date: 1 July 2024
Available Online: 1 July 2024

Figures(5)

Simultaneous degradation and detoxification during pharmaceutical and personal care product removal are important for water treatment. In this study, sodium niobate nanocubes decorated with graphitic carbon nitride (NbNC/g-C₃N₄) were fabricated to achieve the efficient photocatalytic degradation and detoxification of ciprofloxacin (CIP) under simulated solar light. NaNbO₃ nanocubes were in-situ transformed from Na₂Nb₂O₆·H₂O via thermal dehydration at the interface of g-C₃N₄. The optimized NbNC/g-C₃N₄–1 was a type-Ⅰ heterojunction, which showed a high conduction band (CB) level of −1.68 eV, leading to the efficient transfer of photogenerated electrons to O₂ to produce primary reactive species, ^•O₂⁻. Density functional theory (DFT) calculations of the density of states indicated that C 2p and Nb 3d contributed to the CB, and 0.37 e^– transferred from NaNbO₃ to g-C₃N₄ in NbNC/g-C₃N₄ based on the Mulliken population analysis of the built-in electric field intensity. NbNC/g-C₃N₄–1 had 3.3- and 2.3-fold of CIP degradation rate constants (k₁ = 0.173 min⁻¹) compared with those of pristine g-C₃N₄ and NaNbO₃, respectively. In addition, N24, N19, and C5 in CIP with a high Fukui index were reactive sites for electrophilic attack by ^•O₂⁻, resulting in the defluorination and ring-opening of the piperazine moiety of the dominant degradation pathways. Intermediate/product identification, integrated with computational toxicity evaluation, further indicated a substantial detoxification effect during CIP degradation in the photocatalysis system.
- Detoxification,
- Photocatalysis,
- Solar light,
- Ciprofloxacin,
- Reactive sites
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沈阳化工大学材料科学与工程学院沈阳 110142

Solar-light-driven photocatalytic degradation and detoxification of ciprofloxacin using sodium niobate nanocubes decorated g-C3N4 with built-in electric field

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通讯作者: 陈斌, bchen63@163.com

Solar-light-driven photocatalytic degradation and detoxification of ciprofloxacin using sodium niobate nanocubes decorated g-C₃N₄ with built-in electric field