2D MXene Nanofilms with Tunable Gas Transport Channels
By Jie Shen, Guozhen Liu, Yufan Ji, Quan Liu, Long Cheng, Kecheng Guan, Mengchen Zhang, Gongpin Liu, J. Xiong, Jian Yang and 1 more. Advanced Functional Materials, 2018
410 citations recorded by the source corpus.
2D materials' membranes with well‐defined nanochannels are promising for precise molecular separation. Herein, the design and engineering of atomically thin 2D MXene flacks into nanofilms with a thickness of 20 nm for gas separation are reported. Well‐stacked pristine MXene nanofilms are proven to show outstanding molecular sieving property for H2 preferential transport. Chemical tuning of the MXene nanochannels is also rationally designed for selective permeating CO2. Borate and polyethylenimine (PEI) molecules are well interlocked into MXene layers, realizing the delicate regulation of stacking behaviors and interlayer spacing of MXene nanosheets. The MXene nanofilms with either H2‐ or CO2‐selective transport channels exhibit excellent gas separation performance beyond the limits for state‐of‐the‐art membranes. The mechanisms within these nanoconfined MXene layers are discussed, revealing the transformation from “diffusion‐controlled” to “solution‐controlled” channels after chemical tuning. This work of precisely tailoring the 2D nanostructure may inspire the exploring of nanofluidics in 2D confined space with applications in many other fields like catalysis and energy conversion processes.
Subfields: Biomedical Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/790fe8160a989e0653a554d7ff99cf6bb0df451f
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Citations in the corpus
- Thinking the future of membranes: Perspectives for advanced and new membrane materials and manufacturing processes (2020, background): “Insights from GO membranes might pave the way to a new family of high-performance separation membranes derived from other two-dimensional materials such as MXene [142,143], MoS 2 [144], as well as nanoporous metal-organic framework (MOF) [122] nanosheets.”
- Fabrication of surface-charged MXene membrane and its application for water desalination (2021, background): “6a, there are two peaks of –C–O (~1624 cm 1) and –OH (~3486 cm 1) in IR spectra of the pristine MXene membrane, indicating the typical chemical structure of MXene [12,30].”
- Pervaporation membrane materials: Recent trends and perspectives (2021, background): “MXene, a new family of 2D transition metal carbides and carboni-trides, has been explored as building blocks of molecular separation membranes for water purification [167], desalination [168], pervapo-ration [169 – 171] and gas separation [172,173].”