▎ 摘　　要

In this study, a high-performance organic solvent nanofiltration (OSN) membrane is engineered via nanoscale aminated graphene quantum dots (GQD_NH2)-mediated interfacial polymerization. The GQD_NH2, featuring favorable amine monomers, can atomically regulate the diffusion rate at the interface, yielding nanofilms with controllable thickness (decreasing from 200 to 100 nm). Furthermore, the zero-dimensional GQD_NH2 can serve as nanospacers to increase the inner-pore interconnectivity with loose internal architecture, while preserving the narrow free volume distribution via covalent interactions with the rubbery polymeric matrix. An improvement in solvent separation property is achieved, where the best-performing GQD_NH2@PA thin-film nanocomposite (TFN) membrane reaches a magnitude of 2.6-fold higher than that of the pristine polyamide (PA) membrane without significantly compromising its rejection toward organic solvation macro/micromolecules solutes, exhibiting high solvent permeances for mild solvents (such as 11.1 L m- 2 h- 1.bar- 1 for methanol) and aggressive solvents (such as 5.9 L m- 2 h- 1.bar- 1 for dimethylformamide), performing a competitive perm-selectivity among the state-ofthe-art OSN membranes. The long-term operations (140 h) demonstrated the excellent stability of the nanocomposite membranes. We herein report the development of TFN membrane with thin and loose architecture for highly efficient organic solvent-based separation process.