摘要
通过构建Mn^2+/Fe^2+和SO3^2-/Fe^2+两种均相光催化体系,并以罗丹明B(RhB)为模拟污染物评价它们的光催化性能。结果表明,SO3^2-的存在会抑制催化体系的催化氧化活性,SO3^2-/Fe^2+体系的速率常数(0.0203min-1)仅为UV/Fe^2+体系(0.0681min-1)的29.81%;而Mn^2+/Fe^2+体系表现出优异的氧化活性,且当溶液pH=4.0,Fe^2+和Mn^2+浓度分别为0.5mmol/L和0.03mmol/L时,RhB降解率达到100%,速率常数为0.1207min-1。此外,清除剂实验表明,Mn^2+/Fe^2+体系活性物质主要为·OH。
Photocatalytic systems of Mn^2+/Fe^2+and SO3^2-/Fe^2+were constructed,and their photocatalytic performance was evaluated via the degradation of RhB.Results shown that the presence of SO3^2-inhibited the oxidation activity of the catalytic system,and the rate constant(0.0203min-1)was only 29.81%of the UV/Fe^2+system(0.0681min-1).However,Mn^2+/Fe^2+system exhibited excellent oxidation activity,and the removal percent of RhBreached 100%with rate constant of 0.1207min-1 at pH 4.0when the concentration of Fe^2+and Mn^2+was 0.5mmol/Land 0.03mmol/L,respectively.In addition,the scavenger experiments shown that the main active species of Mn^2+/Fe^2+system was·OH.
作者
梁宇
任海涛
韩景
李浩
楼静文
Liang Yu;Ren Haitao;Han Jing;Li Hao;Lou Lingwen(Tianjin and Education Ministry Key Laboratory of Advanced Textile Composite Material,School of Textile Science and Engineering,Tianjin Polytechnic University,Tianjin 300387;Department of Bioinformatics and Medical Engineering,Asia University,Taichung 41354,Taiwan,China)
出处
《化工新型材料》
CAS
CSCD
北大核心
2020年第11期209-213,共5页
New Chemical Materials
基金
天津市自然科学基金资助项目(17JCQNJC08000)
国家自然基金(21806121、51878449)。
