标题：Enhanced antifouling and antimicrobial thin film nanocomposite membranes with incorporation of Palygorskite/titanium dioxide hybrid material
作者：Zhang, Tian; Li, Zhiqiang; Wang, Wenbo; Wang, Yong; Gao, Baoyu; Wang, Zhining
作者机构：[Zhang, Tian; Gao, Baoyu; Wang, Zhining] Shandong Univ, Sch Environm Sci & Engn, Shandong Key Lab Water Pollut Control & Resource, Qingdao 266237, Sha 更多
通讯作者：Gao, Baoyu;Gao, BY;Wang, ZN
通讯作者地址：[Gao, BY; Wang, ZN]Shandong Univ, Sch Environm Sci & Engn, Shandong Key Lab Water Pollut Control & Resource, Qingdao 266237, Shandong, Peoples R China 更多
来源：JOURNAL OF COLLOID AND INTERFACE SCIENCE
关键词：Palygorskite; TiO2; Antifouling; Antibacterial; Thin film nanocomposite; membrane
摘要：Palygorskite (Pal) is a kind of low-cost and environment-friendly natural nanoclay material with tubular structure and excellent hydrophilicity. TiO2 nanoparticles, especially anatase phase, have prominent photocatalytic bactericidal and organic pollutant decomposition activities. In this work, Pal and Pal/TiO2 nanocomposite were successfully embedded in the polyamide (PA) selective layer of the reverse osmosis (RO) membranes via interfacial polymerization. The tubular structure of Pal possesses a cross-sectional area of 0.37 x 0.63 nm(2), which facilitates the selective transport of water molecules through PA layers. The water flux of Pal incorporated TFN membrane increases to approximately 40 l.m(-2).h(-1) at 16 bar, which is 1.6-fold higher than the reference TFC membrane. Meanwhile, the NaCl rejection is maintained at approximately 98%. Although the Pal/TiO2 incorporated TFN membrane exhibited slightly lower flux (1.4-fold higher than TFC), the embedded Pal/TiO2 contributed to the antifouling and photocatalytic bactericidal capacities and the salt rejection maintained at an acceptable level of 98%, which are greatly desired in the membrane desalination and water reclamation processes. (C) 2018 Elsevier Inc. All rights reserved.