自交联的具有抗溶胀特性的 MXene-Intercalated 氧化石墨烯膜可用于染料和盐的阻隔

IF 6.7 Q1 ENGINEERING, ENVIRONMENTAL ACS Environmental Au Pub Date : 2024-01-08 DOI:10.1021/acsenvironau.3c00059
Saurabh Kr Tiwary, Maninderjeet Singh, Farzana Hasan Likhi, Siddharaj Dabade, Jack F. Douglas and Alamgir Karim*, 
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引用次数: 0

摘要

基于膜的水净化技术将在解决饮用水危机中发挥重要作用,为普通民众提供安全清洁的饮用水。为此,一些研究重点关注基于离子排斥技术的近二维膜。然而,这些材料中的膜膨胀已成为一项重大挑战,因为它会导致功能丧失。在此,我们报告了一种自交联的 MXene 互结氧化石墨烯(GO)膜,由于 Ti-O-Ti 与相邻纳米片之间的物理交联作用有效抑制了膜的膨胀,因此该膜仍具有离子和染料阻隔特性。除了 Ti-O-Ti 联接键外,还形成了 C-O-C、O═C-O 和 C-OH 键,这些键对抑制膜的膨胀非常重要。为了确保这些膜在使用环境中的使用寿命,对它们进行了热压和随后的热退火处理。在溶液中浸泡后,经过这种新型加工工艺处理的膜膨胀极小,并能保持功能,在盐和染料浓度范围很宽的情况下都能析出盐和染料。此外,这些膜在 72 小时内成功地析出了染料和盐,而功能没有退化,这表明这些膜具有水过滤应用所需的耐久性。
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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Self-Cross-Linking of MXene-Intercalated Graphene Oxide Membranes with Antiswelling Properties for Dye and Salt Rejection

Membrane-based water purification is poised to play an important role in tackling the potable water crisis for safe and clean water access for the general population. Several studies have focused on near two-dimensional membranes for this purpose, which is based on an ion rejection technique. However, membrane swelling in these materials has emerged as a significant challenge because it leads to the loss of function. Herein, we report a self-cross-linked MXene-intercalated graphene oxide (GO) membrane that retains ion and dye rejection properties because the physical cross-linking interaction between Ti–O–Ti and neighboring nanosheets effectively suppresses the swelling of the membrane. In addition to the associative Ti–O–Ti bonds, C–O–C, O═C–O, and C–OH bonds are also formed, which are important for inhibiting the swelling of the membrane. To ensure the longevity of these membranes in a service context, they were subjected to heat pressurization and subsequent thermal annealing. The membrane subjected to this novel processing history exhibits minimal swelling upon immersion in solutions and retains function, rejecting salt and dyes over a wide range of salt and dye concentrations. Furthermore, these membranes successfully rejected dye and salt over a period of 72 h without a degradation of function, suggesting that these membranes have the requisite durability for water filtration applications.

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ACS Environmental Au
ACS Environmental Au 环境科学-
CiteScore
7.10
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0.00%
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0
期刊介绍: ACS Environmental Au is an open access journal which publishes experimental research and theoretical results in all aspects of environmental science and technology both pure and applied. Short letters comprehensive articles reviews and perspectives are welcome in the following areas:Alternative EnergyAnthropogenic Impacts on Atmosphere Soil or WaterBiogeochemical CyclingBiomass or Wastes as ResourcesContaminants in Aquatic and Terrestrial EnvironmentsEnvironmental Data ScienceEcotoxicology and Public HealthEnergy and ClimateEnvironmental Modeling Processes and Measurement Methods and TechnologiesEnvironmental Nanotechnology and BiotechnologyGreen ChemistryGreen Manufacturing and EngineeringRisk assessment Regulatory Frameworks and Life-Cycle AssessmentsTreatment and Resource Recovery and Waste Management
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