可见光响应磁性分子印迹材料的设计及其对水体POPs选择性吸附/降解研究

Persistent organic pollutants (POPs) with low concentration but high toxicity, are difficult to be removed from the complicated environmental system using conventional technologies. To address this problem, this project will combine molecularly imprinted magnetic materials, which possess a function of selective enrichment, with metal complexes, which are visible-light catalytic activity, to achieve the goal of the POPs degradation through a sequential process of selective adsorption, magnetic separation and photocatalytic degradation. In the planed work, the molecularly imprinted photocatalytic magnetic material with a high content of amino reactive functional groups will be synthesized through a process involving suspension polymerization, ring-opening reaction and amidation reaction. The factors that influence on selective adsorption and photocatalytic degradation of chlorinated phenols in water, such as magnetic, composition, structure, morphology and coordination environment, will be investigated, and their associated adsorption and reaction mechanisms will also be studied. The proposal aims at exploiting new materials and methods with low cost to efficiently remove POPs from the environmental system.

持久性有机污染物（POPs）浓度低、毒性大、难降解，难以采用常规技术将其从复杂环境体系中优先去除。本项目拟将具有选择性富集功能的磁性分子印迹材料与具有可见光催化活性的金属配合物结合起来，以期实现“选择性吸附-磁分离-光催化降解”一体化。通过悬浮聚合、开环反应、酰胺化反应, 制备富含氨基活性功能团的新型磁性分子印迹光催化材料，探索其选择性吸附和光催化降解水中氯酚等POPs，研究该复合材料的磁性、组成、结构、形貌、配位环境等因素的影响并阐明相应的吸附和反应机理。该项目力求为低成本、高效率去除POPs提供新材料和新方法。

本项目以开发“选择性吸附-磁分离-光催化降解”多功能磁性催化材料为目标，合成了氨基功能化纳米Fe3O4磁性材料和离子印迹磁性聚合物，考察了其在酚类、磷酸盐、Cr(VI)以及ClO4-等物质的吸附，探讨了吸附模型和机理；在此基础上，通过引入Fe(III)-salen、AlPcs等，在H2O2和空气氧的作用下，实现了酚类污染物的降解。本项目的实施，提高了Fe3O4基复合材料对污染物的选择性吸附和去除效率，推动这类材料在环境污染物吸附、检测以及治理等领域的应用。