膜科学与技术

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In situ deposition of hydrogen-substituted graphdiyne
membrane and its nanofiltration performance

Authors： YANG Xingda, FAN Hongwei, MENG Hong

Units： 1. College of Chemical Engineering, Beijing University of Chemical Technology， Beijing 100029, China; 2. College of Chemistry, Xinjiang University, Urumqi 830017, China

KeyWords： hydrogen-substituted graphdiyne; graphdiyne composite membrane; in situ; nanofiltration; dye removal

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2025,45(5):1-8

Abstract：

Graphdiyne is an ideal material for the fabrication of high-precision nanofiltration membranes due to its ordered nano-scale pore structure and abundant surface charge. However, challenges remain in the scalable and rapid preparation of graphdiyne membranes. In this study, hydrogen-substituted graphdiyne (HsGDY) was synthesized via a homogeneous reaction using triethynylbenzene (TEB) as the monomer in an ethanol solvent, followed by in situ deposition onto a polyacrylonitrile (PAN) substrate. The HsGDY-PAN composite membrane was successfully fabricated within merely 5 hours. Multiple characterization techniques were employed to investigate the membrane’s surface morphology, molecular structure, functional group composition, hydrophilicity and surface charge characteristics. The effects of monomer concentration on the nanofiltration performance and a long-term durability in cross-flow nanofiltration were systematically evaluated. Results demonstrated that the membrane exhibited optimal nanofiltration performance at a TEB monomer concentration of 0.6 g/L, achieving a rejection rate of 99.10% for congo red with a permeate flux of 128.7 L/(m2· h·MPa）. For methyl blue, chrome black T and alcian blue, rejection rates reached 98.25%, 98.88% and 99.04%, respectively, while maintaining permeate fluxes exceeding 100 L/(m2· h·MPa）. During cyclic stability tests of 80 hours, no significant variations in rejection rates or permeate fluxes were observed.

Funds：

中央高校基本科研业务费专项资金(buctrc202508)；国家自然基金区域创新发展联合基金(U23A20688)

AuthorIntro：

杨星达（1998-），男，山东泰安人，博士研究生，研究方向为石墨炔分离膜的制备及纳滤性能.

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