Tailored design of nanofiltration membrane with MoS2 quantum dots for enhancing selectivity and scaling resistance

IF 8.1 1区 工程技术 Q1 ENGINEERING, CHEMICAL Separation and Purification Technology Pub Date : 2025-03-14 DOI:10.1016/j.seppur.2025.132520
Zhipeng Zhang, Kaiming Fan, Yanling Liu, Xiaoping Wang, Shengji Xia
{"title":"Tailored design of nanofiltration membrane with MoS2 quantum dots for enhancing selectivity and scaling resistance","authors":"Zhipeng Zhang, Kaiming Fan, Yanling Liu, Xiaoping Wang, Shengji Xia","doi":"10.1016/j.seppur.2025.132520","DOIUrl":null,"url":null,"abstract":"Nanofiltration technology is a promising solution for water purification, yet membrane scaling remains a major challenge that compromises both durability and efficiency. In this work, a thin-film nanocomposite (TFN) membrane was fabricated by incorporating molybdenum disulfide quantum dots (MoS<sub>2</sub> QDs) into the aqueous phase of piperazine (PIP) monomers. Diffusion experiments and theoretical calculations demonstrated that the MoS<sub>2</sub> QDs effectively reduced the diffusion rate of PIP due to their hydrophilic and electrostatic properties. As a result, compared to the control membrane, the TFN membranes exhibited a thinner, more hydrophilic, and less dense polyamide selective layer with enhanced electronegativity. The optimal TFN-5 membrane with only 0.0025 wt% MoS<sub>2</sub> QDs doping displayed a water permeance of 17.6 L m<sup>−2</sup>·h<sup>−1</sup>·bar<sup>−1</sup> and excellent selectivity for a CaCl<sub>2</sub>/Na<sub>2</sub>SO<sub>4</sub> ratio of 114.8, surpassing most previously reported nanofiltration membranes. Additionally, the TFN-5 membrane also maintained structure and performance stability in simulated mixed salt solution and 120 h continuous operation tests. These improvements endowed the TFN-5 membrane with superior scaling resistance, resulting in only a 12 % flux decline and minimal gypsum deposition after exposure to a high-salinity mixed salt solution. This work shed light on the design and fabrication of high-performance nanofiltration with enhanced scaling resistance for drinking water treatment applications.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"88 1","pages":""},"PeriodicalIF":8.1000,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Separation and Purification Technology","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1016/j.seppur.2025.132520","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0

Abstract

Nanofiltration technology is a promising solution for water purification, yet membrane scaling remains a major challenge that compromises both durability and efficiency. In this work, a thin-film nanocomposite (TFN) membrane was fabricated by incorporating molybdenum disulfide quantum dots (MoS2 QDs) into the aqueous phase of piperazine (PIP) monomers. Diffusion experiments and theoretical calculations demonstrated that the MoS2 QDs effectively reduced the diffusion rate of PIP due to their hydrophilic and electrostatic properties. As a result, compared to the control membrane, the TFN membranes exhibited a thinner, more hydrophilic, and less dense polyamide selective layer with enhanced electronegativity. The optimal TFN-5 membrane with only 0.0025 wt% MoS2 QDs doping displayed a water permeance of 17.6 L m−2·h−1·bar−1 and excellent selectivity for a CaCl2/Na2SO4 ratio of 114.8, surpassing most previously reported nanofiltration membranes. Additionally, the TFN-5 membrane also maintained structure and performance stability in simulated mixed salt solution and 120 h continuous operation tests. These improvements endowed the TFN-5 membrane with superior scaling resistance, resulting in only a 12 % flux decline and minimal gypsum deposition after exposure to a high-salinity mixed salt solution. This work shed light on the design and fabrication of high-performance nanofiltration with enhanced scaling resistance for drinking water treatment applications.

Abstract Image

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
求助全文
约1分钟内获得全文 去求助
来源期刊
Separation and Purification Technology
Separation and Purification Technology 工程技术-工程:化工
CiteScore
14.00
自引率
12.80%
发文量
2347
审稿时长
43 days
期刊介绍: Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.
期刊最新文献
Mechanisms of contaminant removal with metallic iron (Fe0): A comprehensive and critical review Superhydrophobic fire-extinguishing polyurethane foam for solar-assisted high-efficiency recovery of viscous crude oil spill Electrocatalytic nanocomposite flow-through porous electrodes with sputter-coated Cu/Co nanoparticles for degradation of waterborne perfluorooctanoic acid Self-supported cathode based microbial electro-Fenton for water disinfection: The synergistic inactivation mechanism of biological and electrochemical oxidation Tailored design of nanofiltration membrane with MoS2 quantum dots for enhancing selectivity and scaling resistance
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1