Nanoconfined membranes assembled by the ultrathin LDH and MoS2 nanosheets enable fast and stable water decontamination

Establishment of high-performance membrane-based nanoconfined catalysis is a pressing need to overcome the present challenges such as low permeation flux, inadequate catalytic efficiency, and poor stability. Herein, we present an integrated strategy of combining the nanoconfinement and catalyst/co-catalyst to fabricate the layered double hydroxide/molybdenum disulfide (LDH/MoS2) composite membrane, which can efficiently activate peroxymonosulfate (PMS) for pollutant removal. The LDH/MoS2 membrane achieved 99.8 % removal efficiency of bisphenol A (BPA) within a retention time of only 3.3 ms and maintained stability for 150 h, concurrently upholding a water flux of 557.1 L<middle dot>m(-2)<middle dot>h(-1)<middle dot>bar(-1). Density functional theory (DFT) combined with experimental analyses revealed that the electrostatic interaction between LDH and MoS2 could promote the electron transfer and the nanoconfined environment further lowered the decomposition barrier of PMS to generate hydroxyl and sulfate radicals for BPA degradation. This work provided a novel perspective to upgrade nanoconfined catalytic membranes in wastewater remediation.