The carbon nanofibers supported Co/Ag bimetallic nanoparticles (Co@CNFs-Ag) were synthesized for heterogeneous activation of peroxymonosulfate and efficient oxidation of amoxicillin in this work. Co nanoparticles with a diameter of 20–30 nm were encapsulated in the carbon nanofibers to reduce the loss of Co during the preparation and catalysis processes. Ag nanoparticles (5–10 nm) were distributed on the surface of CNFs. Complete removal of amoxicillin could be achieved within 30 min by Co@CNFs-Ag activated peroxymonosulfate system. The high catalytic performance could be attributed to the large aspect ratio (> 10,000) of the carbon nanofibers and the mutual reaction of the Co/Ag bimetallic nanoparticles with peroxymonosulfate. The optimal mass ratio of oxidant and catalyst was 10 and the optimized pH was 7. Co@CNFs-Ag exhibited stable catalytic activity and minimal metal leakage over a period of 5 cycles. The activation energy of the system was 29.51 kJ/mol derived by the Arrhenius equation. Both hydroxyl and sulfate radicals contributed to amoxicillin degradation and the latter were key to the degradation. Finally, the reaction mechanism of bimetallic synergistic catalytic system and possible amoxicillin degradation pathways were elucidated. The results of this study provide novel insights for application of sulfate radical-based advanced oxidation processes in environmental remediation.

合成了碳纳米纤维负载的Co / Ag双金属纳米颗粒（Co @ CNFs-Ag），用于过氧化单硫酸盐的异质活化和阿莫西林的有效氧化。直径为20–30 nm的Co纳米颗粒被封装在碳纳米纤维中，以减少在制备和催化过程中Co的损失。Ag纳米颗粒（5-10 nm）分布在CNF表面。Co @ CNFs-Ag活化的过一硫酸盐体系可在30分钟内完全去除阿莫西林。较高的催化性能可归因于碳纳米纤维的高长径比（> 10,000）以及Co / Ag双金属纳米粒子与过氧单硫酸盐的相互反应。氧化剂和催化剂的最佳质量比为10，最适pH为7。Co @ CNFs-Ag在5个周期内显示出稳定的催化活性和最小的金属泄漏。根据阿伦尼乌斯方程推导，该系统的活化能为29.51 kJ / mol。羟基和硫酸根均促成阿莫西林降解，后者是降解的关键。最后，阐明了双金属协同催化体系的反应机理和可能的阿莫西林降解途径。这项研究的结果为基于硫酸根的高级氧化工艺在环境修复中的应用提供了新的见识。羟基和硫酸根均促成阿莫西林降解，后者是降解的关键。最后，阐明了双金属协同催化体系的反应机理和可能的阿莫西林降解途径。这项研究的结果为基于硫酸根的高级氧化工艺在环境修复中的应用提供了新的见识。羟基和硫酸根均促成阿莫西林降解，后者是降解的关键。最后，阐明了双金属协同催化体系的反应机理和可能的阿莫西林降解途径。这项研究的结果为基于硫酸根的高级氧化工艺在环境修复中的应用提供了新的见识。