Title:	Scalable synthesis of ultrathin MoS2 membranes for dye desalination.
Authors:	SCHNEIDER, R. TANDEL, A. M. DENGA, E. CORREA, D. S.
Affiliation:	Nanotechnology National Laboratory for Agriculture (LNNA); Department of Chemical and Biological Engineering, University at Buffalo; Department of Chemical and Biological Engineering, University at Buffalo; DANIEL SOUZA CORREA, CNPDIA.
Date Issued:	2023
Citation:	Journal of Membrane Science Letters, v. 3, 100058, 2023.
Pages:	7 p.
Description:	Molybdenum disulfide (MoS2) has been fabricated into thin-film composite (TFC) membranes for dye desalination due to its excellent underwater stability and tunable interlay spacing. However, it remains challenging to synthesize thin layers of MoS2 with high water permeance and high dye rejection due to the difficulty in fabricating large crystalline sheets or exfoliation. Herein, we report a scalable method coupling bottom-up hydrothermal synthesis and top-down ultrasonic exfoliation to obtain well-dispersed MoS2 nanosheets and a vacuum filtration method to prepare ultrathin membranes (thickness: 30 ? 60 nm) for dye desalination. The MoS2 nanosheets and membranes are thoroughly characterized for their chemistries and nanostructures. The membrane with 60-nm MoS2 exhibits water permeance of 32 LMH/bar, Na2SO4 rejection of 2.3%, and Direct Red-80 rejection of 99.0%. The MoS2 membranes exhibit dye desalination performance superior to state-of-the-art commercial polyamide membranes and many leading membranes based on two-dimensional materials.
Keywords:	MoS2 Membranes Dye desalination Hydrothermal reaction Ultrasonic exfoliation
ISSN:	2772-4212
DOI:	doi.org/10.1016/j.memlet.2023.100058
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPDIA)