文献类型：期刊文献

英文题名：Layered double hydroxide modified polyamide reverse osmosis membrane for improved permeability

作者：Liu, Wei-Liang[1];Gao, Jia-Ming[1];Huang, Zhi-Hao[1];Zhang, Hao[1];Li, Meng-Ping[1];Zhang, Xin[1];Ma, Xiao-Hua[1];Xu, Zhen-Liang[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Chem Engn Res Ctr, Membrane Sci & Engn R&D Lab,Shanghai Key Lab Mult, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2020

卷号：203

起止页码：35

外文期刊名：DESALINATION AND WATER TREATMENT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000591824900003)】；

基金：The authors gratefully acknowledge financial support from the National Natural Science Foundation of China (21978081).

语种：英文

外文关键词：Layered double hydroxides; Polyamide TFC membrane; Carbon dots; Morphology; Permeability

摘要：Layered double hydroxides (LDHs) are typical two-dimensional nanomaterials, which can be easily modified to serve molecular transport channels for improving membrane's performances. In this study, two types of LDHs, namely citric acid (CA) intercalated LDHs and carbon dots (CDs) intercalated LDHs, have been synthesized and used as nonofillers to modify polyamide (PA) thin-film composite reverse osmosis membranes. The influence of different concentrations of LDHs on the physicochemical properties and morphologies of the RO membranes was investigated. The chemical composition of the membranes was measured by Fourier transform infrared spectroscopy and the morphologies of the modified RO membranes were studied by scanning electron microscopy, transmission electron microscopy, and atomic force microscopy. The obtained membranes exhibited sparser leaf-like structures, resulting in a flux of 33.2 L m(-2) h(-1), approximately 36% improvement compared with the unmodified membrane. Our results showed that LDHs modified PA membranes could effectively improve the permeability of the membrane.