异相Fenton光催化对有毒有机污染物的降解  

Degradation of RhB by Heterogeneous Fenton System under Visible Irradiation

作　　者：赵超[1] 方艳芬[2] 黄应平[2] 邓安平[2] 姜利荣[1] 

机构地区：[1]华中师范大学化学学院,武汉430072 [2]三峡大学Alan G.MacDiarmid(艾伦.麦克德尔米德)再生能源研究中心,湖北宜昌443002

出　　处：《分析科学学报》2007年第3期273-276,共4页Journal of Analytical Science

基　　金：国家自然科学基金(No.20373074;No.50639070);湖北省青年杰出人才基金(No.2005ABB030);湖北省教育厅自然科学重大基金研究项目(No.2004Z001)

摘　　要：以蒙脱石-K10(Montmorillonite K10)作为Fe3+的载体制备异相Fenton催化剂(Mot-Fe),并用此催化剂在可见光(λ>420 nm)照射下研究其降解染料罗丹明B(Rhoda-mine B,RhB)和2,4-二氯苯酚(2,4-Dichlorophenol,DCP)。研究表明,选定的Mot-Fe/H2O2体系能有效地降解RhB,反应300 min脱色完全,总有机碳(TOC)去除率达85.2%,反应过程中主要涉及到.OH自由基的产生和参与。可见光照射下,对DCP/Mot-Fe/H2O2体系,TOC的去除率达到51.6%。催化剂具有比较好的稳定性,能够重复使用。Fe^3＋ supported on Montmorillonite K10 as effective catalyst for heterogeneous oxidation was prepared. The catalyst was applied for the degradation of Rhodamine B （RhB） and 2, 4-Dichlorophenol （DCP） under visible irradiation （λ〉420 nm）. UV-Vis spectroscopy measurement was made to detect the photoreaction process. The results showed that RhB could be efficiently decolored by chosing RhB/ Mot-Fe/H2O2 system for 300 min irradiation, and the TOC removal rate was 85.2%. DCP mineralized rate was 51.6% at the chosen DCP/FeY/H2O2 system under visible irradiation. The oxidative process was predominated mainly by the .OH radical generated in the system. This solid catalyst was stable for repeated application with little loss of activity.

关 键 词：异相Fenton 脱色降解 蒙脱石 

分 类 号：O657.3[理学—分析化学]