Kim, Ji Hoon Park, Gyeong Seok Kim, Yong-Jae Choi, Eunji Kang, Junhyeok Kwon, Ohchan Kim, Seon Joon Cho, Jeong Ho Kim, Dae Woo 2024-01-19T14:33:30Z 2024-01-19T14:33:30Z 2021-09-05 2021-05-25 1936-0851 https://pubs.kist.re.kr/handle/201004/116978 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. English AMER CHEMICAL SOC GRAPHENE OXIDE MEMBRANES 2-DIMENSIONAL TITANIUM CARBIDE NANOFILTRATION MEMBRANES MXENE FILMS FILTRATION DYES DISPERSIONS STABILITY CRYSTALS FLOW Large-Area Ti3C2Tx-MXene Coating: Toward Industrial-Scale Fabrication and Molecular Separation Article 10.1021/acsnano.1c01448 1 ACS NANO, v.15, no.5, pp.8860 - 8869 ACS NANO 15 5 8860 8869 scie scopus 000656994100083 2-s2.0-85106436238 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article GRAPHENE OXIDE MEMBRANES 2-DIMENSIONAL TITANIUM CARBIDE NANOFILTRATION MEMBRANES MXENE FILMS FILTRATION DYES DISPERSIONS STABILITY CRYSTALS FLOW MXene membrane nanofiltration scale-up stability