“…The porous graphene with controlled and nanosized pores was immobilized on an ultrafiltration membrane for enantioselective separation of d / l -amino acids, achieving high separation factor of 4.76 for d / l -phenylalanine. CNTs have also been functionalized with chiral selectors and used as substrates to achieve chiral separation. ,, Chiral CNTs were synthesized as a unique type of chiral nanomaterial, , but they were never applied for chiral membranes because of the difficulty of obtaining pure chiral CNTs.…”