Citation: Aiping Liang, Chaolin Li, Chen Ling, Hengpan Duan, Wenhui Wang. CoTiO₃ for highly efficient peroxymonosulfate activation: The critical role of Co–O–Ti bond for rapid redox cycles of Co²⁺/Co³⁺[J]. Chinese Chemical Letters, ;2025, 36(10): 110788. doi: 10.1016/j.cclet.2024.110788 shu

CoTiO₃ for highly efficient peroxymonosulfate activation: The critical role of Co–O–Ti bond for rapid redox cycles of Co²⁺/Co³⁺

Aiping Liang ^a ,
Chaolin Li ^{a, b} ,
Chen Ling ^{a, c} ,
Hengpan Duan ^a ,
Wenhui Wang ^{a, *,}

a.
School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China
b.
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
c.
School of Environment and Resources, Taiyuan University of Science and Technology, Taiyuan 030024, China

sunnerwangwenhui@163.com

Received Date: 18 June 2024
Revised Date: 8 November 2024
Accepted Date: 19 December 2024
Available Online: 20 December 2024

Figures(6)

Exploring efficient catalyst is critical for the application of persulfate-based advanced oxidation processes (AOPs) for environment remediation. Herein, perovskite CoTiO₃ was demonstrated an efficient catalyst for peroxymonosulfate (PMS) activation, which shows superior performance compared with single metal oxide system and homogenous systems: It removes 98.2% of hydroxychloroquine (HCQ, drugs for effective treatment of COVID-19) within 20 min at low dose of PMS (0.5 mmol/L), showing high tolerance to the environmental pH range (3.5–10.6) and significant versatility for various refractory organics. Combined with the material characterization and DFT calculations, it is found Co–O–Ti bond in CoTiO₃ serves as an electron mediator to facilitate the rapid redox cycles of Co²⁺/Co³⁺ during activation process, thus maintaining the high catalytic activity. Further mechanism exploration showed that fast regeneration of Co²⁺ ensures the production of high concentration of SO₄^•− and ^•OH, thus securing the rapid degradation of HCQ. Moreover, a designed CoTiO₃-CNT-PVDF membrane reactor can effectively remove refractory pollutant via practically feasible filter-through mode, which delivers a highest removal efficiency and longest operation duration compared with previous developed membrane-based AOPs. The corresponding mechanism revealed in this work can serve as guidelines for the design of advanced heterogenous catalysts and membrane reactors for AOPs.
- Hydroxychloroquine,
- Co–O–Ti bond,
- Redox mediator,
- Fast regeneration of Co²⁺,
- High tolerance and significant versatility,
- CoTiO₃–CNT–PVDF membrane
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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

CoTiO3 for highly efficient peroxymonosulfate activation: The critical role of Co–O–Ti bond for rapid redox cycles of Co2+/Co3+

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通讯作者: 陈斌, bchen63@163.com

CoTiO₃ for highly efficient peroxymonosulfate activation: The critical role of Co–O–Ti bond for rapid redox cycles of Co²⁺/Co³⁺