Preparation and dye separation performance of ZIF-67/mesoporous silica ceramic nanofiltration membrane by liquid phase epitaxy (LPE) growth method

被引：9

作者：

Pang, Long ^{[1
,4
]}

Wu, Mingkai ^{[1
]}

Chai, Zihan ^{[2
]}

Liu, Huimei ^{[1
]}

Chen, Yongsheng ^{[3
]}

Jin, Baodan ^{[1
]}

Cao, Xia ^{[1
]}

机构：

[1] Zhengzhou Univ Light Ind, Coll Mat & Chem Engn, Zhengzhou 450002, Henan, Peoples R China

[2] Henan Normal Univ, Coll Int Educ, Xinxiang 453007, Henan, Peoples R China

[3] Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA

[4] Zhengzhou Univ Light Ind, Dept Mat & Chem Engn, Zhengzhou 450001, Peoples R China

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2023年 / 322卷

基金：

中国国家自然科学基金;

关键词：

Ceramic membrane; ZIF-67; Liquid phase epitaxy growth; Nanofiltration; Dye; METAL-ORGANIC FRAMEWORK; IN-SITU GROWTH; FLUX; MOF;

D O I：

10.1016/j.seppur.2023.124339

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Ceramic membrane plays an important role in separation process with advantages of high thermal and chemical resistances, but its applications on the nanofiltration are restricted because of the limitation of pore size. In this study, a commercial tubular ceramic membrane with pore diameter of 0.1 & mu;m was firstly coated with mesoporous silica substrates, in which ZIF-67 nanocrystals were generated layer-by-layer inside the mesochannels via liquid phase epitaxy growth method. The open pore size of ceramic membrane can be precisely controlled by increasing the growth cycles of ZIF-67 nanocrystals. The influence of preparation conditions on the dye separation was investigated, including growth cycles, precursor concentration, and molar ratio of Co2+/2-methylimidazole (Co2+/Hmim). Under the optimized conditions, the rejection of methylene blue, methyl orange, chromium black T, rhodamine B, acid fuchsin, and Congo red were in the range of 92-99 % with membrane fluxes of 0.45-0.73 L m- 2 h-1. Bovine serum albumin solution was used to evaluate the anti-fouling abilities of the ceramic membrane. The flux recovery ratio, which was calculated according to the ratio between the water permeance after washing and before filtration, was 52.3 % with the flux decline rate of 66.3 %.

引用

页数：8