Enteromorpha-derived Fe/N-rich carbon for efficient degradation of thiacloprid via catalytic ozonation

文献类型： 外文期刊

第一作者： Xuan, Fengxu

作者： Xuan, Fengxu;Li, Yang;Zhang, Shizhen;Li, Xuanke;Wu, Ling;Yang, Lufang;Lv, Fujian;Wang, Mingxi

作者机构：

关键词： Enteromorpha; Fe/N-rich carbon; Catalytic ozonation; Thiacloprid; Reaction mechanism

期刊名称：SEPARATION AND PURIFICATION TECHNOLOGY （ 影响因子：9.0； 五年影响因子：8.5 ）

ISSN： 1383-5866

年卷期： 2025 年 371 卷

页码：

收录情况： SCI

摘要： Heterogeneous catalytic ozonation (HCO) has emerged as a promising advanced oxidation process for eliminating persistent organic pollutants (POPs) from wastewater. However, the development of efficient, costeffective and environmentally benign catalysts remains a critical challenge. Leveraging the inherent heteroatoms in waste biomass, Fe/N-rich carbon (EP-T) catalyst was herein developed via a facile one-step pyrolysis of Enteromorpha, thereby obviating the addition of any external iron and nitrogen sources. The resulting EP-800 demonstrated impressive catalytic performance in HCO, achieving complete degradation of thiacloprid (THIA, a typical POP) within 50 min. Remarkably, the first-order rate constant (kobs) of EP-800/O3 was about 15 times higher than that of ozonation alone. Through comprehensive characterization and mechanistic studies, graphitic N and Fe species were identified as the primary active sites, in which center dot OH, center dot O2- and 1O2 were produced in the HCO system, collectively facilitating the degradation of THIA into less toxic intermediates. This work not only establishes a sustainable paradigm for resourceful utilization of waste biomass but also provides fundamental insights into the HCO mechanisms of biomass-derived carbonaceous catalysts.

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