膜科学与技术

二次生长法在大孔管状载体上制备[Co(Im)2]∞膜

作者：谢忠，王金渠，杨建华，殷慧敏，殷德宏，鲁金明，张艳

单位：大连理工大学精细化工国家重点实验室，吸附与无机膜研究所

关键词：二次生长法；金属有机骨架膜；MOFs; 大孔载体；气体分离

出版年,卷(期):页码： 2014,34(3):30-36

摘要：

以水作为绿色溶剂在室温条件下制备出大小为500nm的[Co(Im)2]∞晶体，粒径分布比较均匀，适宜作为成膜的晶种。利用二次生长法在大孔管状α-Al2O3载体上制备致密连续的[Co(Im)2]∞膜，并考察了成膜时间、合成液浓度对成膜的影响。采用SEM，XRD和单组分气体测试对膜的形貌和气体分离性能进行表征。通过SEM显示[Co(Im)2]∞膜无缺陷，膜层厚度约为9μm。由单组分气体渗透测试可知，室温条件下H2的渗透通量达到1.1×10-8mol m-2s-1Pa-1，H2/CO2，H2/N2和H2/CH4的理想分离系数分别7.8，9.1和7.9，超过努森扩散系数。

[Co(Im)2]∞ seeds with size of 500nm were obtained in aqueous solution at near room temperature. The characterization of SEM, XRD showed that the [Co(Im)2]∞ crystals with uniform particle size distribution is suitable as seeds for the selected macroporous support. Through secondary growth method in aqueous solutions, continuous and crack-free [Co(Im)2]∞ membrane was successfully obtained on the low-cost macroporous α-Al2O3 support, exhibiting H2 permeance of 1.1×10-8mol m-2s-1Pa-1, with ideal selectivities for H2/CO2, H2/N2 and H2/CH4 ystem of 7.8, 9.1 and 7.9. Moreover, The effects of some parameters including the concentration of solution and synthesis times on the formation of [Co(Im)2]∞ membranes were investigated

谢忠(1985-)，男，安徽安庆人，博士研究生，从事新型金属有机骨架膜的制备与应用研究。

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