磁性粉煤灰表面导电印迹复合光催化剂的制备及其选择性吸附/光降解水杨酸类有机污染物的研究

项目名称： 磁性粉煤灰表面导电印迹复合光催化剂的制备及其选择性吸附/光降解水杨酸类有机污染物的研究

项目编号： No.21306068

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 化学工业

项目作者： 王丹丹

作者单位： 江苏大学

项目金额： 26万元

中文摘要： 在可见光照射下，利用磁性粉煤灰表面导电印迹复合光催化剂，实现对水杨酸类有机污染物的选择性吸附/光降解具有重要意义。本课题拟采用固体废弃物粉煤灰空心微珠为载体，继而依次包覆了便于分离回收的磁性层和离子掺杂的半导体层，并利用掺杂了导电高分子材料的表面分子印迹技术，印迹水杨酸及其衍生物类有机污染物，来构建磁性粉煤灰表面导电印迹复合光催化剂，以解决难回收、二次利用率低、光催化效率不高及其光催化降解无选择性等问题。研究不同方法制备的磁性粉煤灰表面导电印迹复合光催化剂；研究各层之间的界面关系及作用机理；研究表面分子印迹层中模板分子、功能单体、导电高分子材料、交联剂之间的成键规律；研究磁性粉煤灰表面导电印迹复合光催化剂选择性吸附/光降解水杨酸类污染物的动力学/热力学行为及其优先降解机理。

中文关键词： 磁性载体材料；半导体材料；表面印迹技术；选择性吸附/光降解；有机污染物

英文摘要： It has great significance for selective adsorption/photodegradation of salicylic acid organic pollutants under visible light irradiation by using the conductive imprinted photocatalyst based on magnetic fly-ash. This project was designed to use the solid waste (fly-ash cenospheres) as the carrier, afterwards, the magnetic layer and ion doped semiconductor layer were coated onto the surface of fly-ash cenospheres, respectively. Subsequently, salicylic acid or its derivatives organic pollutants was imprinted onto the surface of the semiconductor layer by using the conductive polymer and surface molecular imprinting technique. Finally, the conductive imprinted photocatalyst based on magnetic fly-ash was obtained, which solved the problem of the difficult recovery, the low second utilization rate, the low photocatalytic efficiency and poor selectivity. Researched the different synthetic methods of conductive imprinted photocatalyst based on magnetic fly-ash; researched the relationship and mechanism of the interface between the layers; researched the bonding regularity of the template molecule, functional monomer, conductive polymer and cross-linking in the surface molecular imprinting layer; researched the selective adsorption/photodegradation kinetics/ thermodynamic behavior and the preferential degradation mechan

英文关键词： Magnetic carrier materials；Semiconductor materials；Surface molecular imprinting technology；Selective adsorption/photodegradation；Organic pollutants