化工学报2026，Vol.77Issue(2)：922-932,11.DOI:10.11949/0438-1157.20250774
可见光下碳点介导Cu2+/Cu+氧化还原循环促进过硫酸盐活化降解四环素
Boosting persulfate activation via carbon dots-mediated Cu2+/Cu+redox cycling under visible light for efficient tetracycline removal
摘要
Abstract
Cu3(VO4)2·3H2 O(CuVs)as a photocatalyst suffers from low charge separation efficiency.The unique structure of carbon dots(CDs)enables them to store and transfer photogenerated electrons,which can synergistically enhance the activation efficiency of peroxydisulfate(PS)when combined with CuVs.In this study,a simple hydrothermal method was used to prepare a CDs/CuVs nanocomposite(CDs/CuVs)for the visible light activation of PS to degrade tetracycline(TC).The introduction of CDs effectively refined the microstructure of CuVs,modulated the distribution of copper valence states,and significantly accelerated interfacial charge separation and migration.Under visible light irradiation,the system achieved a TC degradation efficiency of 99.9%within 40 minutes,with a reaction rate constant(0.11 min-1)6.1 times higher than that of pure CuVs.After five consecutive cycles,the catalytic activity remained at 87%,demonstrating excellent anti-interference capability against ions.Notably,the presence of HCO-3 suppressed the leaching of Cu2+(leaching concentration as low as 0.6 mg/L).Mechanistic studies revealed that the primary active species involved were holes(h+),singlet oxygen(1O2),and hydroxyl radicals(·OH).CDs facilitated the transfer of photogenerated electrons,accelerating the Cu+/Cu2+redox cycle,thereby enhancing PS activation efficiency and photocatalytic performance.This study provides a new strategy for developing highly efficient and stable catalysts.关键词
纳米材料/催化剂活化/降解/过硫酸盐/可见光/四环素降解Key words
nanomaterials/catalyst activation/degradation/persulfate/visible-light/tetracycline degradation分类
通用工业技术引用本文复制引用
庞尔楠,李世嘉,雒志利,李如月..可见光下碳点介导Cu2+/Cu+氧化还原循环促进过硫酸盐活化降解四环素[J].化工学报,2026,77(2):922-932,11.基金项目
山西工程科技职业大学校科技创新基金(202229) （202229）
山西工程科技职业大学横向项目(2023HX021) （2023HX021）
