Functionalized multi-walled carbon nanotube thin-layered hollow fiber membrane for enantioselective permeation of racemic β-substituted-α-amino acids

Carbon nanomaterials for designing next-generation membranes and their emerging applications

“…The TFN layer exhibited a high enantioselectivity of 99% by selectively adsorbing the d -isomer while facilitating the permeation of the l -isomer. 80 These findings highlight the potential of functionalized SWCNT, DWCNT, or MWCNT-incorporating membranes for efficient enantioselective separation in pharmaceutical applications. Graphene-based composite membranes, consisting of graphene or graphene oxide, have attracted significant attention in various fields.…”

“…Therefore, our group has developed SWCNT and double-walled CNT (DWCNT)-based composite membrane for the separation of b-substituted-a-amino acids. 61,80,81 In 2020, our group has successfully demonstrated a strategy to impart enantioselectivity to hydrophobic SWCNTs through covalent functionalization. Functionalized SWCNTs were used to create a thin film nanocomposite membrane using D-tryptophan as a chiral selector, which selectively adsorbed the D-isomer of tyrosine while allowing the L-isomer of the same to pass through.…”

“…Another extensively used method for the impregnation of CNTs over the membrane is by IP. 61,80,131 A schematic representation of the IP method is shown in Fig. 5.…”

“…Therefore, our group has developed SWCNT and double-walled CNT (DWCNT)-based composite membrane for the separation of β-substituted-α-amino acids. 61,80,81…”

Facile UV-Induced Surface Covalent Modification to Fabricate Durable Superhydrophobic Fabric for Efficient Oil–Water Separation

“…However, not only massive time, materials, and other resources are engaged in these traditional cleanup methods, but also high costs, complex processes [15], and low separation efficiency [16]. Since Jiang et al, first reported coating a superhydrophobic/superoleophilic film on mesh to recover oily water due to its special wettability, which can selectively absorb oil while repelling water [17], superhydrophobic materials have gained considerable attention, thereby a variety of superhydrophobic/superoleophilic materials have been developed, including porous foam [18], sponges [19,20], fabrics [21][22][23][24], aerogels [25], and membranes [26][27][28][29].…”