文献类型：期刊文献

英文题名：MOF-derived cobalt@hollow carbon spheres: scalable synthesis and efficient peroxymonosulfate activation for p-chlorophenol degradation

作者：Zhao, Yan[1];Zheng, Qianwen[1];Wang, Jiahao[1];Cui, Lekang[1];Pan, Helin[1];Zhang, Yayun[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Specially Funct Mat & Related Technol, Minist Educ, Shanghai, Peoples R China

年份：2026

卷号：101

期号：2

起止页码：391

外文期刊名：JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY

收录：;EI(收录号：20254619517235);WOS:【SCI-EXPANDED(收录号:WOS:001614303000001)】；

基金：This work was financially supported by National Natural Science Foundation of China (nos. 22008073, 21878091, 22078100, 52102098), Fundamental Research Funds for the Central Universities and Shanghai Talent Development Fund (2021021).

语种：英文

外文关键词：hollow carbon spheres; cobalt doping; peroxymonosulfate (PMS); water treatment; 4-chlorophenol

摘要：BACKGROUND: The design of catalysts, particularly those with industrially practical dimensions, is critical for advancing wastewater treatment. RESULTS: We report a scalable strategy that integrates MOF-derived Co active sites into millimeter-sized hollow carbon spheres (HCS) prepared via phase separation of polyacrylonitrile. The resulting Co@HCS combines hierarchical porosity and graphitized shells with confined Co nanoparticles and Co-N-C sites, enabling efficient peroxymonosulfate (PMS) activation. Compared with HCS and Co@ZIF, Co@HCS achieved >80%p-chlorophenol (4-CP; 50 mg L-1) removal within 10 min, with activity enhanced by increased Co loading and optimal PMS dosage (0.50 g L-1). The catalyst exhibited broad pH adaptability (50.1-90.2% removal at pH 3-9), strong temperature responsiveness and low apparent activation energy (16.3 kJ mol-1). Radical quenching and electron paramagnetic resonance confirmed SO4 center dot- as the dominant species, while X-ray photoelectron spectroscopy revealed dynamic Co-0/Co2+/Co3+ cycling sustaining PMS activation. Notably, the millimeter-sized morphology of Co@HCS enabled stable >70% 4-CP removal over 48 h in continuous flow (addressing nanocatalyst drawbacks). CONCLUSION: Co@HCS is an efficient, durable and recyclable catalyst. This catalyst combines nanoscale catalytic precision with macroscopic practicality, facilitating the practical application of persulfate-driven advanced oxidation processes and providing a durable and recyclable solution for such processes in continuous-flow water treatment.