文献类型：期刊文献

英文题名：Carbon quantum dots doped thin-film nanocomposite (TFN) membrane on macroporous ceramic hollow fiber support via one-step interfacial polymerization

作者：Wu, Yu-Zhe[1];Shareef, Usman[1];Xu, Ji-Peng[2];Xu, Zhen-Liang[1];Li, Ping-Ping[1];Li, Yu-Xuan[1];Li, Ping[1];Gao, Peng[1];Zhang, Xin[1];Xu, Sun-Jie[1]

机构：[1]East China Univ Sci & Technol, Chem Engn Res Ctr, Sch Chem Engn, State Key Lab Chem Engn,Membrane Sci & Engn R&D L, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

年份：2021

卷号：266

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20211310135084);WOS:【SCI-EXPANDED(收录号:WOS:000647567600001)】；

基金：The authors gratefully acknowledge the research funding provided by the National Natural Science Foundation of China (22078092) and supported by the Fundamental Research Funds for the Central Universities (JKA012022001 and JKA012011017).

语种：英文

外文关键词：Carbon quantum dots; Interfacial polymerization; Pervaporation; Ceramic hollow fiber; Polyvinyl alcohol

摘要：The amino (-NH2) modified carbon quantum dots (N-CDs) doped thin film nanocomposite (TFN) membranes were prepared on the macroporous ceramic hollow fiber (CHF) substrate with a pore size of about 300 nm through one-step interfacial polymerization (IP) process. The abundant hydroxyl, carboxyl, and amino groups of aqueous phase additives (N-CDs and polyvinyl alcohol (PVA)) provide attachment sites for ethylenediamine (EDA) to build a modified membrane structure. Molecular dynamics (MD) simulation was employed to study the diffusion process in IP. The results show that the addition of N-CDs reduced the EDA diffusion coefficient significantly from (4.58 +/- 0.50) x 10(-5) cm(2)/s to (1.44 +/- 0.10) x 10 5 cm(2)/s. The wrinkled and ultra-thin polyamide (PA) layer with a thickness of 28 +/- 3 nm was observed by the field-emission scanning electron microscopy (SEM). X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), and dynamic contact angle were used to characterize the chemical structure and hydrophilicity. The effect of additives concentration on pervaporation (PV) performance for ethanol (EtOH) dehydration has been investigated systematically. The resultant membrane exhibited excellent performance with the total permeation flux of 3.15 kg.m(-2).h(-1) and separation factor of 1127. Besides, there was no significant performance decline during the 160 h long-term stability test, indicating that the membranes own the potential application in industry.