Insights into free radical and non-radical routes regulation for water cleanup

作者：Yi Zhou, Wenxuan Guo, Yanpan Li, Ming Gao, Xuning Li, Wenyuan Liu, Zhuan Chen, Xiaohui Zhang, Yanbo Zhou, Mingyang Xing · 发表于：Nature Communications · 年份：2025 · DOI：10.1038/s41467-025-63235-2 · 被引用次数：70 · 研究领域：Advanced oxidation water treatment、Electrochemical Analysis and Applications、Water Treatment and Disinfection

In the field of wastewater treatment, the regulation of free radical and non-radical routes has been one of the major challenges. This study investigates the regulation of radical and non-radical oxidation pathways in the peroxymonosulfate (PMS) oxidation system by controlling the calcination temperature of carbon materials and constructing bimetallic single-atom catalysts (NC-FeMn(TA)). Density functional theory calculations and experimental tests indicate that increasing the pyridinic nitrogen content and incorporating single metal atoms in nitrogen-doped carbon materials result in a predominantly non-radical oxidation process. In contrast, enhancing the content of graphitic and pyrrolic nitrogen species and introducing bimetallic catalytic centers promote a radical oxidation pathway. The NC-FeMn(TA)/PMS system demonstrates high oxidation performance over a broad pH range, exhibiting significant interference resistance and stability, with 100% degradation of target pollutants after 22 cycles and complete removal of emerging pollutants (including pharmaceuticals and personal care products, endocrine disrupting chemicals, dyes and chemical materials) within 5 min. This system’s remarkable performance suggests broad application potential in water pollution control field. Controlling oxidation pathways is crucial for efficient water purification. Here, authors develop Fe/Mn single-atom catalysts that tune radical and non-radical processes, enabling rapid, robust degradation of ...