Vacancy Functionalized MoS2 Nanolaminated Membranes for Efficient Sieving in Forward Osmosis

IF 26.8 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Materials Pub Date : 2025-07-22 DOI:10.1002/adma.202504781

Ting Ying, Nicolas Onofrio, Liang Mei, Huarong Peng, Zhen Zhang, Meng Gu, Chen Ma, Ye Chen, Jiang Zhou, Kenneth M. Y. Leung, Chong Cheng, Shuang Li, Bilu Liu, Chuyang Y. Tang, Damien Voiry, Zhiyuan Zeng

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引用次数: 0

Abstract

2D transition‐metal dichalcogenides (TMDs) based nanolaminates are promising candidates for water purification. However, fabricating nanochannels with tunable capillary widths remain a challenge. This study proposed a sulfur vacancy functionalization strategy for fabricating high performance nanolaminate membranes by grafting three kinds of thiol (S‐H) containing molecules (Cysteine, 3‐Mercapto‐1,2‐propanediol, 1‐Propanethiol) on MoS2 nanosheets, in which propanethiol functionalized MoS2 membrane exhibited best salt rejection (99.3%) and water/salt selectivity (800 bar−1) in forward osmosis (draw solution: sucrose solution). It is found the capillary width increased from 0.2 Å in pristine MoS2 to ≈5 Å in propanethiol functionalized MoS2 membranes. Numerical simulations suggest that nanofluidic properties of the functionalized membranes are governed by the fundamental interaction between water and the corresponding S‐H functional group, and the interlayer distance. Importantly, since the S‐H containing molecules can repair MoS2 nanosheets by fitting into the sulfur vacancies, the stability of the membranes is also improved with minimal swelling, which is promising for their practical applications.

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正向渗透中高效筛分的空位功能化二硫化钼纳米膜

基于过渡金属二硫化物（TMDs）的二维纳米层合材料是水净化的有希望的候选者。然而，制造具有可调毛细管宽度的纳米通道仍然是一个挑战。本研究提出了一种硫位功能化策略，通过在二硫化钼纳米片上接枝三种硫醇（S‐H）分子（半胱氨酸、3‐巯基醇‐1、2‐丙二醇、1‐丙硫醇）来制备高性能纳米层膜，其中丙硫醇功能化的二硫化钼膜在正向渗透（萃取溶液：蔗糖溶液）中表现出最佳的阻盐性（99.3%）和水/盐选择性（800 bar−1）。发现毛细宽度从原始二硫化钼的0.2 Å增加到丙硫醇官能化二硫化钼膜的≈5 Å。数值模拟表明，功能化膜的纳米流体特性是由水与相应的S - H官能团之间的基本相互作用和层间距离决定的。重要的是，由于含有S - H的分子可以通过填入硫空位来修复MoS2纳米片，因此膜的稳定性也得到了改善，并且膨胀最小，这对它们的实际应用很有希望。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Materials 工程技术-材料科学：综合

CiteScore

43.00

自引率

4.10%

发文量

2182

审稿时长

2 months

期刊介绍： Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.