Noh Seung-Jun, Yoon Sung Pil, Han Jonghee, Park Sunggook, Kim Jinsoo
J Nanosci Nanotechnol. 2015 Jan;15(1):575-8. doi: 10.1166/jnn.2015.8347.
Zeolitic imidazolate frameworks (ZIFs) have been the focus of interest in adsorption, catalysis, and membrane applications due to their superior thermal and chemical stability, tunable microporous channels, and tailorable physical/chemical properties. In this study, ZIF-7 membranes were successfully prepared on macroporous a-alumina substrate by in situ solvothermal method, without the necessity of seeding or surface modification step. Addition of sodium formate during the reaction facilitates continuous well-intergrown crystalline ZIF-7 layer. As-synthesized ZIF-7 membrane was characterized by XRD, FE-SEM and gas permeation test. The H2 permeance through 5 μm ZIF-7 membrane was 1.9 x 10(-7) mol/m2 x s x Pa with ideal selectivity of H2/CO2 = 15.2.
沸石咪唑酯骨架材料（ZIFs）因其优异的热稳定性和化学稳定性、可调节的微孔通道以及可定制的物理/化学性质，一直是吸附、催化和膜应用领域的研究热点。在本研究中，通过原位溶剂热法在大孔α-氧化铝基底上成功制备了ZIF-7膜，无需晶种或表面改性步骤。反应过程中添加甲酸钠有助于形成连续且生长良好的ZIF-7晶体层。采用X射线衍射（XRD）、场发射扫描电子显微镜（FE-SEM）和气体渗透测试对合成的ZIF-7膜进行了表征。通过5μm厚的ZIF-7膜的氢气渗透率为1.9×10⁻⁷ mol/m²·s·Pa，氢气/二氧化碳的理想选择性为15.2。
