Zhang Qi, Wang Hua, Fan Xinfei, Chen Shuo, Yu Hongtao, Quan Xie
Engineering Research Center of Shellfish Culture and Breeding in Liaoning Province, School of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China E-mail:
Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China.
Water Sci Technol. 2016;73(4):725-33. doi: 10.2166/wst.2015.543.
In order to improve the permeate flux of photocatalytic membranes, we present an approach for coupling TiO2 with ceramic hollow fiber membranes. The ceramic hollow fiber membranes with high permeate flux were fabricated by a controlled wet-spinning process using polyethersulfone (PESf) and ceramic powder as precursors and 1-methyl-2-pyrrolidinone as solvent, and the subsequent TiO2 coating was performed by a dip-coating process using tetra-n-butyl titanate as precursor. It has been found that the PESf/ceramic powder ratio could influence the structure of the membranes. Here the as-prepared TiO2 hollow fiber membranes had a pure water flux of 4,450 L/(m(2)·h). The performance of the TiO2 hollow fiber membrane was evaluated using humic acid (HA) as a test substance. The results demonstrated that this membrane exhibited a higher permeate flux under UV irradiation than in the dark and the HA removal efficiency was enhanced. The approach described here provides an operable route to the development of high-permeable photocatalytic membranes for water treatment.
为了提高光催化膜的渗透通量，我们提出了一种将二氧化钛与陶瓷中空纤维膜相结合的方法。采用聚醚砜（PESf）和陶瓷粉末作为前驱体，1-甲基-2-吡咯烷酮作为溶剂，通过可控湿纺工艺制备了具有高渗透通量的陶瓷中空纤维膜，随后以钛酸四丁酯作为前驱体，采用浸涂工艺进行二氧化钛涂层。研究发现，PESf/陶瓷粉末比例会影响膜的结构。此处制备的二氧化钛中空纤维膜的纯水通量为4450 L/(m²·h)。以腐殖酸（HA）作为测试物质对二氧化钛中空纤维膜的性能进行了评估。结果表明，该膜在紫外光照射下的渗透通量高于黑暗环境，且腐殖酸去除效率有所提高。本文所述方法为开发用于水处理的高渗透性光催化膜提供了一条可行途径。
