材料科学与工程学报2025，Vol.43Issue(2)：267-275,307,10.DOI:10.14136/j.cnki.issn1673-2812.2025.02.013
Br表面改性碳量子点的制备及光催化活化过氧单硫酸盐降解罗丹明B
Preparation of Br-Modified Carbon Quantum Dots and Photocatalytic Degradation of Rhodamine B by Activated PMS
摘要
Abstract
This study demonstrates a synthesis method for the carbon quantum dots with the surface modified by Br(Br-CQDs).Br-CQDs were characterized by FTIR,XPS,TEM,HRTEM,etc,which confirmed the successful introduction of Br into CQDs.The Introduction of Br can reduce the band gap of CQDs,which can increase the light adsorption and improve the transfer of light electrons.Under visible light irradiation,Br-CQDs can efficiently catalyze the oxidation of organic compounds such as rhodamine B by activated peroxymonosulfate(PMS)with three times the catalytic activity of non-modified CQDs.We studied the dependence of the oxidation of organic compounds on the usage amount of Br-CQDs,the type and the concentration of organic contaminates,as well as pH value.We also investigated the mechanism for Br-CQDs catalyzing the activation of PMS to degrade organic compounds by free radical quenching experiments.It was found that the main active species was superoxide radicals.关键词
碳量子点/溴改性/过氧单硫酸盐/罗丹明B/超氧自由基Key words
Carbon quantum dots/Bromine modification/Peroxymonosulfate/Rhodamine B/Superoxide radical分类
通用工业技术引用本文复制引用
张利洁,李德刚,韩文渊,郁宸,张维民,徐会君..Br表面改性碳量子点的制备及光催化活化过氧单硫酸盐降解罗丹明B[J].材料科学与工程学报,2025,43(2):267-275,307,10.基金项目
国家自然科学基金项目(21776175) （21776175）
