Cyclodextrin tuned interlayer spacing in covalent organic framework membranes for efficient dye/salt separation

被引：0

作者：

Wei, Xiaocui ^{[1
]}

Liu, Yanan ^{[1
]}

Huang, Jianghao ^{[1
]}

Li, Zongmei ^{[1
]}

Zhao, Fu ^{[1
]}

Zhang, Zhao ^{[1
]}

Wang, Tingyuan ^{[1
]}

Fan, Chunyang ^{[1
]}

Yang, Yuhan ^{[1
]}

Jiang, Zhongyi ^{[1
,2
]}

机构：

[1] Hainan Univ, Collaborat Innovat Ctr Ecol Civilizat, Sch Chem & Chem Engn, Haikou 570228, Peoples R China

[2] Tianjin Univ, Sch Chem Engn & Technol, Key Lab Green Chem Technol, Minist Educ, Tianjin 300072, Peoples R China

来源：

DESALINATION | 2025年 / 596卷

基金：

海南省自然科学基金; 中国国家自然科学基金;

关键词：

Covalent organic framework membranes; Cyclodextrin; Interlayer nanochannels; Dye/salt separation; GRAPHENE OXIDE MEMBRANES;

D O I：

10.1016/j.desal.2024.118351

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Covalent organic framework (COF) membranes assembled by top-down approach often suffer from low permeance due to pore sheltering effect between adjacent COF nanosheets. Herein, COF membrane with tunable interlayer spacing is fabricated using cyclodextrin (CD) as intercalator for efficient dye/salt separation. The intercalation of CD can increase the interlayer spacing between adjacent COF nanosheets to decrease mass transport resistance. Accordingly, water can transport through both the intrinsic pores of COF nanosheets and the interlayer nanochannels, and the water flux of the COF/CD membrane is increased to 160 +/- 8 L m- 2 h- 1, which is four times higher than that of COF membrane, with high rejection (>95.9 %) for dyes of molecular weight exceeding 327 g mol- 1. Meanwhile, the COF/CD membrane exhibits rejection of 99.7 % for alcian blue 8GX (AB) and rejection of 11.1 % for NaCl in the AB/NaCl solution. This study offers a facile way to tune the interlayer spacing in COF membranes for diverse chemical separations.

引用

页数：12

共 58 条

[1] An Ionic Diode Covalent Organic Framework Membrane for Efficient Osmotic Energy Conversion [J].