预涂晶种诱导法在α-Al2O3陶瓷管载体上合成ZIF-8膜

doi:10.3724/SP.J.1077.2012.11739

无机材料学报 ›› 2012, Vol. 27 ›› Issue (10): 1105-1111.DOI: 10.3724/SP.J.1077.2012.11739 CSTR: 32189.14.SP.J.1077.2012.11739

预涂晶种诱导法在α-Al₂O₃陶瓷管载体上合成ZIF-8膜

杜淑慧, 刘亚光, 孔令寅, 张健, 刘海鸥, 张雄福

(大连理工大学化工学院, 精细化工国家重点实验室, 大连116024)

收稿日期:2011-11-29 修回日期:2012-01-06 出版日期:2012-10-20 网络出版日期:2012-09-17
作者简介:杜淑慧(1985-), 女, 硕士研究生. E-mail: hmilyqzd@163.com
基金资助:
国家自然科学基金(21076030, 21036006); 辽宁省高等学校优秀人才支持计划项目(LR201008); 辽宁省自然科学基金(201202027)

Seeded Secondary Growth Synthesis of ZIF-8 Membranes Supported on α-Al₂O₃ Ceramic Tubes

DU Shu-Hui, LIU Ya-Guang, KONG Ling-Yin, ZHANG Jian, LIU Hai-Ou, ZHANG Xiong-Fu

(State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China)

Received:2011-11-29 Revised:2012-01-06 Published:2012-10-20 Online:2012-09-17
About author:DU Shu-Hui. E-mail: hmilyqzd@163.com
Supported by:
National Natural Science Foundation of China(21076030, 21036006); Program for Liaoning Excellent Talents in University (LR201008); Natural Science Foundation of Liaoning Province (201202027)

摘要/Abstract

摘要： 以纳米级ZIF-8晶体粒子为晶种, 利用晶种诱导二次生长法在α-Al₂O₃陶瓷管载体上制备出连续的ZIF-8膜, 并详细考察了晶种涂层液中晶种含量、成膜温度和添加剂PEI、甲酸钠用量等参数对ZIF-8成膜的调控影响. 经SEM、XRD和气体渗透分析结果表明: 制备的ZIF-8纳米粒子的粒径约为100~150 nm, 粒度分布较均匀, 适宜作为成膜的晶种; 在晶种液中添加适量的PEI作为偶联剂有利于连续ZIF-8晶种层及膜的形成; 在成膜液中添加适量的甲酸钠能有效阻止载体表面晶种层的溶解脱落. SEM显示所得ZIF-8膜的晶体粒径均一、晶粒间连接紧密且无明显裂痕, 膜层厚度约为18 μm. 单组分气体渗透测试可知, H₂/CO₂的分离因数为5.4, H₂/CH₄的分离因数为2.56, 气体通过ZIF-8膜均属于努森扩散范围.

关键词: 金属有机骨架材料, MOFs膜, ZIF-8膜, 气体分离

Abstract: A seeded growth procedure was used to successfully prepare continuous and well inter-grown zeolitic imidazolate framework-8 (ZIF-8) membranes on porous α-alumina tubes. The effects of some parameters including the content of seeds and PEI in seeding solution, the concentration of sodium formate in synthesis solution and synthesis temperature on the formation of ZIF-8 membranes were investigated in detail. The characterization of SEM, XRD and single gas permeation showed that PEI added in the seeding solution can improve the adhesion between the seed crystals and the support surface. Moreover, sodium formate used in synthesis solution could prevent the seed layer from peeling off during the membrane growing process. The as-synthesized ZIF-8 membrane is well inter-grown and continuous. Single gas permeation shows that the separation factors of H₂/CO₂ and H₂/CH₄ are 5.4 and 2.56, respectively, indicating that Knudsen diffusion plays a controlling role in the gas permeation through the ZIF-8 membrane.

Key words: metal-organic frameworks, MOFs membrane, ZIF-8 membrane, gas separation

中图分类号:

O614

杜淑慧, 刘亚光, 孔令寅, 张健, 刘海鸥, 张雄福. 预涂晶种诱导法在α-Al₂O₃陶瓷管载体上合成ZIF-8膜[J]. 无机材料学报, 2012, 27(10): 1105-1111.

DU Shu-Hui, LIU Ya-Guang, KONG Ling-Yin, ZHANG Jian, LIU Hai-Ou, ZHANG Xiong-Fu. Seeded Secondary Growth Synthesis of ZIF-8 Membranes Supported on α-Al₂O₃ Ceramic Tubes[J]. Journal of Inorganic Materials, 2012, 27(10): 1105-1111.

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预涂晶种诱导法在α-Al₂O₃陶瓷管载体上合成ZIF-8膜

Seeded Secondary Growth Synthesis of ZIF-8 Membranes Supported on α-Al₂O₃ Ceramic Tubes

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