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凝胶修饰结合同源金属诱导制备UiO-66气体分离膜

作者：丁小凡，鲁金明，杨建华，刘毅

单位：大连理工大学吸附与无机膜研究所，精细化工国家重点实验室，大连 116024

关键词： UiO-66膜；气体分离；凝胶修饰；同源金属诱导；CO2分离

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2023,43(4):28-36

摘要：

金属有机骨架化合物UiO-66具有孔隙率高、孔道尺寸可调、优良的化学稳定性和热稳定性等特点，是理想的膜分离材料，在气体膜分离领域具有很高的应用价值。本文针对在大孔载体上难以制备连续完整的UiO-66膜的问题，采用凝胶修饰载体和同源金属氧化物诱导相结合的方式，在大孔氧化铝载体上制备致密的UiO-66膜，通过SEM、XRD、EDX等探究了Zr溶胶和合成液配比等因素对成膜的影响，并与传统晶种生长法成膜过程进行对比。实验结果表明Zr溶胶的最佳组成为0.16 g/mL，合成液乙酸最佳摩尔比为1:100，所制备的膜在0.1 MPa条件下，H2的渗透速率为6.20 × 10-8 mol/(m2·s·Pa)，H2/CO2、H2/N2、H2/CH4的理想选择性分别为20.79、2.42、2.02。

The metal-organic framework UiO-66 is an ideal membrane separation material with high porosity, adjustable pore size, excellent chemical and thermal stability, and has high application value in the field of gas membrane separation. In this paper, for the difficulty of preparing continuous and complete UiO-66 membranes on microporous carriers, a combination of gel-modified support and homologous metal oxide induction was used to prepare dense UiO-66 membranes on microporous alumina support, and the effects of Zr-sol and synthesis solution on the membrane formation were investigated by SEM, XRD, EDX, etc., and compared with the membrane formation process by traditional seed growth method. The experimental results showed that the optimal content of Zr-sol was 0.16 g/mL, the optimal molar ratio of synthesis solution acetic acid was 1:100, the permeation of H2 was 6.20×10-8 mol/(m2·s·Pa) at 0.1 MPa, and the ideal selectivity of H2/CO2, H2/N2, and H2/CH4 were 20.79, 2.42, and 2.02, respectively

基金项目：

国家自然科学基金项目（21776031）。

作者简介：

丁小凡（1997-），男，山东潍坊人，硕士生，从事MOF膜的制备与应用

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