大连理工大学学报2025，Vol.65Issue(2)：111-117,7.DOI:10.7511/dllgxb202502001
纳米CuO活化过二硫酸盐催化降解罗丹明B研究
Research on Rhodamine B catalytic degradation using peroxydisulfate activated by nano CuO
摘要
Abstract
Four CuO particles with different structures are prepared via pyrolysis method.Compared with other CuO particles,nano CuO particles exhibit eminent catalytic activity during the activation of peroxydisulfate(PDS)for Rhodamine B(RhB)degradation.The pseudo-first-order kinetic constant(0.045 1 min-1)of RhB catalytic degradation in nano CuO/PDS system is 2.5,2.8 and 12.5 folds higher than those mediated by CuO catalytic system prepared at 300,450,600 ℃ of pyrolysis temperature,respectively.Increasing nano CuO and PDS concentrations can promote the degradation of RhB,and the optimal pH for RhB degradation in nano CuO/PDS system is under neutral conditions.Nano CuO exhibits high reusability,which can maintain the degradation ratio of RhB higher than 90％after four cycles.The quenching experiment demonstrates that singlet oxygen(1O2)is the main reactive oxygen species during the activation of PDS by nano CuO for RhB degradation.The 1 O2 concentration in nano CuO/PDS system is estimated to be about 9.4×10-12 mol/L,and·O2-is considered as an intermediate product for 1O2 production.The study results provide a new strategy for the design of metal oxides such as CuO as PDS activators to degrade refractory organic pollutants.关键词
纳米CuO颗粒/过二硫酸盐/罗丹明B/单线态氧Key words
nano CuO particles/peroxydisulfate/Rhodamine B/singlet oxygen分类
环境科学引用本文复制引用
于华莉,高明睿,王连峰,郭海燕..纳米CuO活化过二硫酸盐催化降解罗丹明B研究[J].大连理工大学学报,2025,65(2):111-117,7.基金项目
国家自然科学基金资助项目(42207288) （42207288）
大连市科技人才创新支持计划青年科技之星资助项目(2022RQ032). （2022RQ032）
