TiO_(2)复合膜的制备及改性研究进展

Research progress in preparation and modification of TiO_(2) composite membrane

随着工业的发展,废水排放量的不断增加,对环境造成了极大的污染。因此,需要一种高效的废水处理方法。膜分离技术是去除水中污染物的一种可持续、高效的现代分离技术,已被广泛应用于废水处理方面。TiO_(2)作为一种常用的去除污染物的催化剂,具有化学稳定性好、无毒无害、催化活性高等特点。而将TiO_(2)纳米颗粒添加至聚合物基质中制备的TiO_(2)复合膜,不仅可以避免TiO_(2)在水溶液中易团聚的问题,而且能提高聚合物膜在高温下的渗透选择性和稳定性。重点介绍了TiO_(2)复合膜的制备方法,探讨了复合膜的改性技术及降解废水中污染物的机理。并针对TiO_(2)复合膜材料在污染物降解应用中存在的问题,提出了相关研究趋势,旨在为TiO_(2)复合膜材料的理论研究和工业推广应用提供参考依据。

With the development of industry,the increasing discharge of wastewater has caused great pollution to the environment.Therefore,an efficient wastewater treatment method is needed.Membrane separation technology is a sustainable and efficient modern separation technology for removing pollutants in water,which has been widely used in wastewater treatment.TiO_(2),as a commonly used catalyst for removal of pollutants,has good chemical stability,nontoxicity and harmlessness,and high catalytic activity.The TiO_(2) composite membrane prepared by adding TiO_(2) nanoparticles into polymer matrix can not only avoid the aggregation of TiO_(2) in aqueous solution,but also improve the permeability selectivity and stability of polymer membrane at high temperature.This paper highlighted the preparation method of TiO_(2) composite membrane,and discussed the modification technology of composite membrane and the mechanism of pollutant degradation in wastewater.In view of the problems existing in the application of TiO_(2) composite membrane materials in pollutant degradation,the related research trends were proposed,aiming to provide references for the theoretical research and industrial application of TiO_(2) composite membrane materials.