离子液体导向合成CNT内嵌式负载量子点复合膜及其对水体中抗生素的选择性光催化降解行为和机理研究

项目名称： 离子液体导向合成CNT内嵌式负载量子点复合膜及其对水体中抗生素的选择性光催化降解行为和机理研究

项目编号： No.21676127

项目类型： 面上项目

立项/批准年度： 2017

项目学科： 有机化学

项目作者： 闫永胜

作者单位： 江苏大学

项目金额： 30万元

中文摘要： 目前水环境中抗生素残留引起的环境污染和食物链危害是亟需解决的课题。分子印迹膜光催化技术是当前处理抗生素污染的理想手段之一。系统的研究该降解技术，实现“光”和“膜识别”协同作用是提高降解效率是其相关研究的面临的主要问题。本课题拟采用化学方法制备多孔阵列膜, 再结合分子印迹技术、量子点制备技术、内嵌负载技术以及离子液体合成技术制备量子点/碳纳米管复合印迹膜体系；实现膜高效选择性光催化降解环境水体中抗生素的同时具备优良的催化再生性和稳定性；进一步研究量子点的尺寸和形貌、印迹聚合层的厚度、离子液体致孔的孔隙率以及多孔基膜的孔径大小与光催化降解抗生素的效率、稳定性以及再生性之间的协同关系，以及膜分离过程中的动力学、热力学性质，并进一步研究其的催化活性以及分离机理；建立适用于选择性分离识别与降解环境水体中抗生素残留的新方法。

中文关键词： 光催化技术；膜催化技术；碳纳米管；量子点；离子液体

英文摘要： At present, the issue of environmental pollution and contaminated food chain isneeded to be solved urgently, which was caused by the antibiotic residues inaquatic environment. Molecularly imprinted membrane photocatalytic technology iscurrently one of the ideal means to deal with the pollution of antibiotics.However, the main problem of improving the degradation efficiency is to realizethe synergy of light and recognition of membrane . Then the degradationtechnology should be studied systematacially. In this study we prepared the porousarray membrane using chemical methods. The research combined membranes withmolecular imprinting technology, quantum dot fabrication technology, embeddedtechnology and ionic liquid synthesis technology to obtain the quantum dots/carbonnanotube composite imprinted membrane system. The imprinted membrane exhibitedhigh ability of selectivity and photocatalytic degradation to antibiotic inaquatic environment. Moreover, imprinted membranes had excellent catalyticregeneration and stability. In addition, the collaborative relationships betweenefficient photocatalytic degradation of antibiotics and many effect factors suchas size and morphology of the quantum dots, thickness of imprinted membrane layer,porosity of ionic liquid and pore size of porous membranes were studied. And itfurther studied the kinetics and thermodynamic properties in the process ofmembrane separation, as well as the catalytic activity and separation mechanism ofmembrane. Finally, a new method for selectively recognizing, separating anddegrading the antibiotic residues in water was established.

英文关键词： Photocatalytic technology;Membrane catalytic technology;Carbon nanotube;Quantum dot;Ionic liquid