Large-Area Ti3C2Tx-MXene Coating: Toward Industrial-Scale Fabrication and Molecular Separation
- Authors
- Kim, JH (Kim, Ji Hoon); Park, GS (Park, Gyeong Seok); Kim, YJ (Kim, Yong-Jae); Choi, E (Choi, Eunji); Kang, J (Kang, Junhyeok); Kwon, O (Kwon, Ohchan); Kim, SJ (Kim, Seon Joon); Jeong Ho Cho; DAEWOO KIM
- Issue Date
- May-2021
- Publisher
- AMER CHEMICAL SOC
- Keywords
- MXene; membrane; nanofiltration; scale-up; stability
- Citation
- ACS NANO, v.15, no.5, pp 8,860 - 8,869
- Journal Title
- ACS NANO
- Volume
- 15
- Number
- 5
- Start Page
- 8,860
- End Page
- 8,869
- URI
- https://yscholarhub.yonsei.ac.kr/handle/2021.sw.yonsei/6408
- DOI
- 10.1021/acsnano.1c01448
- ISSN
- 1936-0851
- Abstract
- Large-scale fabrication of MXene films is in high demand for various applications, but it remains difficult to meet industrial requirements. In this study, we develop a slot-die coating method for the preparation of large-area MXene membranes. The technique allows the fabrication of continuous and scalable coatings with a rapid coating speed of 6 mm s(-1). The thickness can be readily controlled from the nanometer scale to the micrometer scale, and the alignment of the nanosheet is enhanced by the shear force of the slot-die head. Molecular separation experiments employing a film with a thickness of approximately 100 nm are performed. A nanofiltration performance with water permeance of 190 LMH/bar and molecular weight cutoff of 269 Da is achieved, surpassing previously reported results obtained using MXene-based nanofiltration membranes. The stability of the membrane is highlighted by its nanofiltration performance of 30 days under harsh oxidizing conditions, which is the longest operation ever achieved for a 2D material-based membrane. The extraordinary stability of the film suggests its high potential for industrial and practical applications. The antioxidizing phenomena can be attributed to self-protection of the MXene surface by adsorbed organic molecules, which are particularly stabilized with positively charged molecules via chemisorption.
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