Citation: Xinyang Li, Yannan Li, Hao Zhang, Zhen Shen, Shuang Cheng, Guicheng Liu, Hong Yao. Electro-catazone treatment of an ozone-resistant drug: Effect of sintering temperature on TiO₂ nanoflower catalyst on porous Ti gas diffuser anodes[J]. Chinese Chemical Letters, ;2021, 32(10): 3221-3225. doi: 10.1016/j.cclet.2021.03.072 shu

Electro-catazone treatment of an ozone-resistant drug: Effect of sintering temperature on TiO₂ nanoflower catalyst on porous Ti gas diffuser anodes

Xinyang Li ^a ,
Yannan Li ^a ,
Hao Zhang ^a ,
Zhen Shen ^a ,
Shuang Cheng ^a ,
Guicheng Liu ^b ,
Hong Yao ^{a, *,}

a.
Beijing International Scientific and Technological Cooperation Base of Water Pollution Control Techniques for Antibiotics and Resistance Genes, Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Department of Municipal and Environmental Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
b.
Department of Physics, Dongguk University, Seoul 04620, Republic of Korea

hyao@bjtu.edu.cn

yaohongts@163.com

Received Date: 28 December 2020
Revised Date: 6 February 2021
Accepted Date: 26 March 2021
Available Online: 30 March 2021

Figures(4)

Electrochemical heterogeneous catalytic ozonation (E-catazone) is a promising and advanced oxidation technology that uses a titanium dioxide nanoflower (TiO_2-NF)-coated porous Ti gas diffuser as an anode material. Our previous study has highlighted that the importance of the TiO_2-NF coating layer in enhancing OH production and rapidly degrading O₃-resistant drugs. It is well known that the properties of TiO_2-NF are closely related to its sintering temperature. However, to date, related research has not been conducted in E-catazone systems. Thus, this study evaluated the effect of the sintering temperature on the degradation of the O₃-resistant drug para-chlorobenzoic acid (p-CBA) using both experimental and kinetic modeling and revealed its influence mechanism. The results indicated that the TiO_2-NF sintering temperature could influence p-CBA degradation and OH production. TiO_2-NF prepared at 450 ℃ showcased the highest p-CBA removal efficiency (98.5% in 5 min) at a rate of 0.82 min^-1, and an OH exposure of 8.41 × 10^-10molL^-1s. Kinetic modeling results and interface characterization data revealed that the sintering temperature could alter the TiO₂ crystallized phase and the content of surface-adsorbed oxygen, thus affecting the two key limiting reactions in the E-catazone process. That is, ≡TiO₂ surface reacted with H₂O to form TiO₂-(OH)₂, which then heterogeneously catalyzed O₃ to form OH. Consequently, E-catazone with a TiO_2-NF anode prepared at 450 ℃ generated the highest surface reaction rate (5.00 × 10^-1 s^-1 and 4.00 × 10^-3 L mol^-1 s^-1, respectively), owing to its higher anatase content and adsorbed oxygen. Thus, a rapid O₃-TiO₂ reaction was achieved, resulting in an enhanced OH formation and a highly effective p-CBA degradation. Overall, this study provides novel baseline data to improve the application of E-catazone technology.
- Electrochemical,
- Ozonation,
- Sintering temperature,
- Crystallized phase,
- Interface reactions
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沈阳化工大学材料科学与工程学院沈阳 110142

Electro-catazone treatment of an ozone-resistant drug: Effect of sintering temperature on TiO2 nanoflower catalyst on porous Ti gas diffuser anodes

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通讯作者: 陈斌, bchen63@163.com

Electro-catazone treatment of an ozone-resistant drug: Effect of sintering temperature on TiO₂ nanoflower catalyst on porous Ti gas diffuser anodes