An innovative approach for the preparation of confined ZIF-8 membranes by conversion of ZnO ALD layers

被引：97

作者：

Drobek, Martin ^{[1
]}

Bechelany, Mikhael ^{[1
]}

Vallicari, Cyril ^{[1
]}

Abou Chaaya, Adib ^{[1
]}

Charmette, Christophe ^{[1
]}

Salvador-Levehang, Claudia ^{[1
]}

Miele, Philippe ^{[1
]}

Julbe, Anne ^{[1
]}

机构：

[1] Univ Montpellier 2, CNRS, ENSCM, Inst Europeen Membranes,UMR 5635, F-34095 Montpellier 5, France

来源：

JOURNAL OF MEMBRANE SCIENCE | 2015年 / 475卷

关键词：

Atomic Layer Deposition; ZIF-8; membrane; Nanocomposite membrane; Confinement; Gas separation; ZEOLITIC-IMIDAZOLATE FRAMEWORK; IN-SITU SYNTHESIS; OPTICAL-PROPERTIES; SEPARATION; REACTORS;

D O I：

10.1016/j.memsci.2014.10.011

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

An innovative eco-friendly approach has been developed for the synthesis of ZIF-8-based nanocomposite membranes. The method involves the Atomic Layer Deposition (ALD) of ZnO thin films on the grains of a macroporous ceramic support and their subsequent conversion to ZIF-8 using a 2-methylimidazole/methanol solution under solvothermal conditions. Despite applying extremely low quantity of chemicals, reproducible and good quality ZIF-8-based membranes have been obtained, in which the ZIF-8 material was fully confined within the ceramic support macropores, thus leading to enhanced thermo-mechanical strength. A judicious choice of both the deposition conditions of ZnO layers and the solvothermal treatment parameters for their subsequent conversion to ZIF-8 was the key point for validation of this original protocol and evaluation of its potential for up scaling on tubular industrial supports. The physico-chemical characterization of the ZIF-8/ZnO/alpha-Al2O3 nanocomposite membranes was completed by a study of their gas transport properties. Reproducible ZIF-8/ZnO/alpha-Al2O3 nanocomposite membranes were produced and tested in the separation of binary gas mixtures: membranes were found to extract H-2 from H-2/CO2 and H-2/CH4 equimolar gas mixtures with selectivities of about 7.8 and 12.5 respectively, measured at 100 degrees C. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：39 / 46

页数：8

共 29 条

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