耦合多孔氧化物半导体的自洁净光电催化过滤膜的制备及其水处理研究

Coupling metal oxide-based semiconductor photocatalysis and membrane filtration for water treatment has attracted numerous interest; however, poor adhesion of semiconductor nanoparticles on polymer surface and low photocatalytic activity are two main obstacles to practical application. To address these challenges, this project strategically introduces conductive membrane to enhance the efficiency of pollutant photodegradation. Accordingly, photoelectrocatalytic membranes and system can be developed through optimizing the composition and structure of semiconducting materials and conductive polymer. Typically, based on interfacial engineering, porous TiO2 microspheres and films, synthesized by self-assembly process, are empolyed to compactly couple with conductive polymers or ceramic membranes for cross flow or dead end filtration, respectively. The resultant self-cleaning photoelectrocatalytic membranes are promising for sea water pretreatment, organic wastewater and pharmaceutical wastewater treatments, etc.

基于半导体光催化和膜过滤的耦合技术近年来吸引了学术界和工业界的广泛关注，但负载在高分子膜表面的纳米光催化剂颗粒易逸出，以及较低的光催化效率限制了该技术的普遍应用。为解决这两个关键科学问题，本项目将导电膜技术引入到光催化膜分离耦合体系，结合膜材料和光催化材料的优化设计以及两者间复合制备技术，发展光电催化功能膜以及相应的水处理系统。其中多孔光催化材料选用自组装构筑的 TiO2多孔微球或多孔薄膜，通过界面优化，使他们能与导电高分子滤膜或无机滤膜进行牢固的杂化结合，实现光电催化和膜过滤的稳定并行。这种具有自清洁功能的光电催化过滤膜系统在淡化海水的深度预处理、有机化工和制药污水处理等方面具有良好的应用前景。

基于半导体光催化和膜过滤的耦合技术近年来吸引了学术界和工业界的广泛关注，但负载 在高分子膜表面的纳米光催化剂颗粒易逸出，以及较低的光催化效率限制了该技术的普遍应用 。为解决这两个关键科学问题，本项目将导电膜技术引入到光催化膜分离耦合体系，结合膜材 料和光催化材料的优化设计以及两者间复合制备技术，发展光电催化功能膜以及相应的水处理 系统。其中多孔光催化材料选用自组装构筑的 TiO2多孔微球或多孔薄膜，通过界面优化，使 他们能与导电高分子滤膜或无机滤膜进行牢固的杂化结合，实现光电催化和膜过滤的稳定并行 。这种具有自清洁功能的光电催化过滤膜系统展示了良好的并发的膜过滤和光电催化性能