可磁分离的碳纳米管/碘化氧铋复合光催化剂的制备和对新型污染物选择性催化机理研究

项目名称： 可磁分离的碳纳米管/碘化氧铋复合光催化剂的制备和对新型污染物选择性催化机理研究

项目编号： No.21477167

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 化学工业

项目作者： 李俐俐

作者单位： 周口师范学院

项目金额： 79万元

中文摘要： 国际环境科学界对污染物的研究重心，现已由传统污染物，逐步扩展到药品、个人护理品、内分泌干扰物等新型污染物。本研究在充分探讨不同表面性质的MWNTs对水体中不同类型新型污染物的吸附机理、BiOI/ MWNTs异质结光催化剂光催化机理的基础上，首次提出将可磁分离的复合光催化剂--BiOI/ MWNTs /NiFe204作为解决新型污染物的途径。该种异质结催化剂由碳纳米管（MWNTs），填充于MWNTs管腔内的磁性NiFe204纳米颗粒和均匀分布于MWNTs管壁外的BiOI组成。新型污染物的选择性去除通过对MWNTs表面进行处理，使MWNTs表面性质与靶标化合物性质相匹配的方法实现。该研究将揭示新型污染物在复合光催化剂中的去除过程机理，建立降解反应动力学模型，为水体中其他有机污染物的选择性原位去除研究提供科学依据。

中文关键词： 碳纳米管；选择性吸附；反应动力学；光降解机理；新型污染物

英文摘要： Environmental scientists have gradually shifted their focus from traditional pollutants to the pharmaceuticals and personal care products, endocrine disruptors and other pollutants called emerging contaminants. In this work, a novel magnetic photocatalyst，called BiOI/ MWNTs /NiFe204 , is proposed as a potential solution to the recent severe problems of emerging contaminants for the first time. The fabrication of photocatalyst is based on the deep understand of selective adsorption mechanism of emerging contaminants on modified MWCNTS and photodegradation mechanism on BiOI/ MWNTs heterogeneous catalyst. The BiOI/ MWNTs /NiFe204 heterogeneous photocatalyst is consisted of multi-walled carbon nanotubes (MWCNTs), NiFe204 magnetic nanoparticles anchored inside the MWCNTS and BiOI uniformly dispersed on the external surface of the MWCNTS. The selective removel of emerging contaminants might be achieved by designing specific surface functionalities for MWCNTs that match the properties of the molecules of target compounds. The photodegradation mechanisms and reaction kinetics model occurred on BiOI/ MWNTs /NiFe204 are investigated. This work would provide new insight into selective removal of other organic contaminants in situ in water.

英文关键词： carbon nanotube;selective adsorption;reaction kinetics;photodegradation mechanisms;emerging contaminants