Novel Organic-Dehydration Membranes Prepared from Zirconium Metal-Organic Frameworks

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• 作者：Xinlei Liu ; Chenghong Wang ; Bo Wang and Kang Li
• 刊名：Advanced Functional Materials
• 出版年：2017
• 出版时间：January 19, 2017
• 年：2017
• 卷：27
• 期：3
• 全文大小：1764K
• ISSN：1616-3028

文摘

Membranes with outstanding performance that are applicable in harsh environments are needed to broaden the current range of organic dehydration applications using pervaporation. Here, well-intergrown UiO-66 metal-organic framework membranes fabricated on prestructured yttria-stabilized zirconia hollow fibers are reported via controlled solvothermal synthesis. On the basis of the adsorption–diffusion mechanism, the membranes provide a very high flux of up to ca. 6.0 kg m⁻² h⁻¹ and excellent separation factor (>45 000) for separating water from i-butanol (next-generation biofuel), furfural (promising biochemical), and tetrahydrofuran (typical organic). This performance, in terms of separation factor, is one to two orders of magnitude higher than that of commercially available polymeric and silica membranes with equivalent flux. It is comparable to the performance of commercial zeolite NaA membranes. Additionally, the membrane remains robust during a pervaporation stability test (≈300 h), including exposure to harsh environments (e.g., boiling benzene, boiling water, and sulfuric acid) where some commercial membranes (e.g., zeolite NaA membranes) cannot survive.