title: A controlled wet-spinning and dip-coating process for preparation of high-permeable TiO2 hollow fiber membranes.
abstract: 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.
authors.affiliation: 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: wanghua@dlou.edu.cn.
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: 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: wanghua@dlou.edu.cn.
authors.forename: Hua
authors.initials: H
authors.lastname: Wang
authors.affiliation: Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Xinfei
authors.initials: X
authors.lastname: Fan
authors.affiliation: Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Shuo
authors.initials: S
authors.lastname: Chen
authors.affiliation: Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Hongtao
authors.initials: H
authors.lastname: Yu
authors.affiliation: Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Xie
authors.initials: X
authors.lastname: Quan
mesh_terms: D002516:Ceramics / Q000737:chemistry; D006812:Humic Substances / Q000032:analysis; D008567:Membranes, Artificial; D011760:Pyrrolidinones; D014025:Titanium / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods
chemical_list: D006812:Humic Substances; D008567:Membranes, Artificial; D011760:Pyrrolidinones; C009495:titanium dioxide; D014025:Titanium; C038678:N-methylpyrrolidone