Citation: Yifen He, Chao Qu, Na Ren, Dawei Liang. Enhanced degradation of refractory organics in ORR-EO system with a blue TiO₂ nanotube array modified Ti-based Ni-Sb co-doped SnO₂ anode[J]. Chinese Chemical Letters, ;2024, 35(8): 109262. doi: 10.1016/j.cclet.2023.109262 shu

Enhanced degradation of refractory organics in ORR-EO system with a blue TiO₂ nanotube array modified Ti-based Ni-Sb co-doped SnO₂ anode

Yifen He ^a ,
Chao Qu ^{a, b, *,} ,
Na Ren ^a ,
Dawei Liang ^a

a.
Department of Materials Chemistry, School of Materials Science & Engineering, Beihang University, Beijing 102206, China
b.
Department of Environmental Science, Faculty of Environment & Life, Beijing University of Technology, Beijing 100124, China

quchao@bjut.edu.cn

Received Date: 3 August 2023
Revised Date: 6 October 2023
Accepted Date: 26 October 2023
Available Online: 30 October 2023

Figures(9)

Recently, a novel 2-electron oxygen reduction reaction (ORR) based electro-oxidation (EO) system was developed, which utilizes a H₂O₂ generation cathode instead of H₂ evolution cathode. A Ti-based Ni-Sb co-doped SnO₂ (Ti/NATO) anode was selected for efficient degradation of refractory organics and O₃ production. The synergistic reaction of O₃/H₂O₂ further accelerated the generation of hydroxyl radicals (^•OH) in the ORR-EO system. However, the catalytic activity and long-term effectiveness of the Ti/NATO anode limited the large-scale application of the ORR-EO process. In this study, a blue TiO₂ nanotube array (blue-TiO₂-NTA) inter-layer was introduced into the fabrication process between the Ti substrate and NATO catalyst layer. Compared to the Ti/NATO anode, the Ti/blue-TiO₂-NTA/NATO anode achieved higher efficiency of organic removal and O₃ generation. Additionally, the accelerated lifetime of the Ti/blue-TiO₂-NTA/NATO anode was increased by 7 times compared to the Ti/NATO anode. When combined with CNTs-C/PTFE air cathode in ORR-EO system, all anodic oxidation and O₃/H₂O₂ processes achieved higher ^•OH production. Over 92% of TOC in leachate bio-effluent was effectively eliminated with a relatively low energy cost of 45 kWh/t.
- Electro-oxidation,
- Blue TiO₂ nanotube array,
- O₃/H₂O₂ process,
- Refractory organics,
- Leachate bio-effluent
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Enhanced degradation of refractory organics in ORR-EO system with a blue TiO2 nanotube array modified Ti-based Ni-Sb co-doped SnO2 anode

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通讯作者: 陈斌, bchen63@163.com

Enhanced degradation of refractory organics in ORR-EO system with a blue TiO₂ nanotube array modified Ti-based Ni-Sb co-doped SnO₂ anode