膜科学与技术

蒸汽相转换法制备ZIF-8膜及其气体分离性能探究

作者：赵锦岳，鲁金明，杨建华，刘毅，王金渠，张艳

单位：大连理工大学化工学院，辽宁大连 116024

关键词： ZIF-8膜；孔内成膜；气体分离；大孔载体；

出版年,卷(期):页码： 2022,42(6):14-21

摘要：

金属有机骨架ZIF-8由于具有合适的孔道尺寸、优良的化学稳定性和热稳定性，使得其在气体分离方面有潜在的应用价值。针对工业大孔载体成膜困难、不致密、通量低的问题，本文采用限制性内扩散法在大孔载体内部制备致密的ZIF-8膜，并对其合成机理进行探究，同时探究内扩散时间、晶化温度、溶剂的量等因素对膜分离性能的影响，采用X射线衍射、扫描电子显微镜等技术对膜的形貌和结构进行表征。研究结果表明，当以甲醇作为溶剂，使用氧化锌凝胶，内扩散时间为10 s，在170 ℃晶化时间为10 h时，成功在管状大孔载体孔内制备致密的膜。单组分气体渗透实验结果表明，在25 ℃和0.1 MPa条件下，H2的渗透速率为5.53×10-7 mol/（m2·s·Pa），H2/CO2、H2/N2和H2/CH4的理想选择性分别为13.20、12.96和12.89。

In this paper, a dense ZIF-8 membrane was prepared inside the macroporous support by the restricted internal diffusion method, and its synthesis mechanism was explored. The results showed that when methanol was used as the solvent, zinc oxide gel was used, the internal diffusion time was 10 s, and the crystallization time was 10 h at 170 °C, dense membranes were successfully prepared in the pores of the tubular macroporous support. The results of single-component gas permeation experiments showed that the permeation rate of H2 is 5.53×10 -7 mol/(m2·s·Pa) at 25 ℃ and 0.1 MPa, and the ideal selectivities of H2/CO2, H2/N2 and H2/CH4 were 13.20, 12.96 and 12.89, respectively.

赵锦岳（1997-），男，山东潍坊人，主要从事ZIF-8膜的合成及其气体分离性能探究

参考文献：

[1] Shah M, Mccarthy M C, Sachdeva S, et al. Current Status of Metal–Organic Framework Membranes for Gas Separations: Promises and Challenges[J]. Ind Eng Chem Res, 2012, 51(5):2179-2199.
[2] Bauer C. A.,Timofeeva T. V., Settersten T. B., et al. Influence of connectivity and porosity on ligand-based luminescence in zinc meal-organic frameworks[J].J. Am. Chem. Soc., 2007, 129: 7136-7144.
[3] James S. L. Metal-organic frameworks [J]. Chem. Soc. Rev., 2003, 32: 276-288.
[4] Li J. R., Sculley J., Zhou H. C. Metal-Organic Frameworks for Separations [J]. Chem Rev, 2012, 112: 869–932.
[5] Venna S R, Carreon M A. Metal organic framework membranes for carbon dioxide separation[J]. Chem Eng Sci, 2015, 124:3-19.
[6] Xiang L, Jia J, Hubberstey P, et al. Hydrogen storage in metal–organic frameworks[J]. Cryst Eng Comm, 2007, 9(6):438-448.
[7] 朱敏. 先进储氢材料导论[M]. 科学出版社, 2015.
[8] Hermes S., Schroder F., Chelmowski R., et al. Selective nucleation and growth of metalorganic open framework thin membranes on patterned COOH/CF3-terminated self-assembled monolayers on Au(111) [J]. J Am Chem Soc, 2005, 127:13744-13745.
[9] Qiu S, Ming X, Zhu G. Metal-organic framework membranes: From synthesis to separation application[J]. Chem Soc Rev, 2014, 43(16) : 6116-6140.
[10]刘振波,封红瑞,张磊,刘爽,兰欣宇,杨树斌.ZIF-8及其衍生材料在水处理领域的应用[J/OL].精细化工:1-12
[11]李会东,崔凤娇,陈晨,王之夏,刘欣欣.ZIF-8及其复合材料吸附水中抗生素研究进展[J].水处理技术,2021,47(11):8-12.
[12] Angelique B., Fischer R. A. Metal-Organic Framework Thin membranes: From Fundamentals to Applications [J]. Chem Rev 2012, 112:1055-1083.
[13] Bradshaw D., Garai A., Huo J. Metal-organic framework growth at functional interfaces: thin membranes and composites for diverse applications [J]. Chem Soc Rev, 2012, 41:2344–2381.
[14] Shekhah O., Liu J., Fischer R. A., et al. MOF thin membranes: existing and future applications [J]. Chem Soc Rev, 2011, 40:1081-1106.
[15] Huang A, Dou W, Caro J. Steam-Stable Zeolitic Imidazolate Framework ZIF-90 Membrane with Hydrogen Selectivity through Covalent Functionalization[J]. J Chem Soc, 2010, 132(44):15562-15564.
[16] Sheng Z, Wei Y, Zhuang L, et al. Introduction of metal precursors by electrodeposition for the in situ growth of metal–organic framework membranes on porous metal substrates[J]. J Mater Chem A, 2017, 5 : 1948-1951.
[17] Li Y. S., Liang F. Y., Bux H., et al. Molecular Sieve
Membrane: Supported Metal-Organic Framework with High Hydrogen Selectivity [J]. Angew. Chem. Int. Ed., 2010, 49:548-551.
[18] Li Y. S., Bux H., Feldhoff A., et al. Controllable Synthesis of Metal-Organic Frameworks: From MOF Nanorods to Oriented MOF Membranes [J]. Adv Mater, 2010, 22:3322-3326.
[19] Nian P, Li Y, Zhang X, et al. ZnO Nanorod-Induced Heteroepitaxial Growth of SOD Type Co-Based Zeolitic Imidazolate Framework Membranes for H2 Separation[J]. ACS Appl Mater Interfaces, 2018, 10(4):4151-4160.
[20]尚鸿飞,鲁金明,刘毅,杨建华,张艳.金属有机骨架ZIF-67膜的制备和表征[J].膜科学与技术,2021,41(05):73-78.

服务与反馈：

【文章下载】【加入收藏】

《膜科学与技术》编辑部地址：北京市朝阳区北三环东路19号蓝星大厦邮政编码：100029 电话：010-64426130/64433466 传真：010-80485372邮箱：mkxyjs@163.com