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

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 mechanism onto salicylic acid pollutants by the conductive imprinted photocatalyst based on magnetic fly-ash.

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。

在光照射下，利用磁性导电印迹复合光催化剂，实现对水环境中有机污染物的选择性吸附/光降解具有重要意义。本课题拟采用粉煤灰、碳纳米管、磁性材料等为载体，并在粉煤灰和碳纳米管中引入了便于分离回收的磁性材料，继而再包覆/负载了半导体材料，并利用表面分子印迹技术构建了磁性印迹复合光催化剂，此外，还在表面印迹层中引入导电聚合物制备了磁性导电印迹复合光催化剂，以解决分离回收难、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；研究表面印迹层中模板分子、功能单体、交联剂之间的成键规律；研究磁性导电印迹复合光催化剂选择性吸附/光降解有机污染物的动力学/热力学行为及其降解机理。