Highly Water-Stable Zirconium Metal鈥揙rganic Framework UiO-66 Membranes Supported on Alumina Hollow Fibers for Desalination
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- 作者：Xinlei Liu ; Nilay Keser Demir ; Zhentao Wu ; Kang Li
- 刊名：Journal of the American Chemical Society
- 出版年：2015
- 出版时间：June 10, 2015
- 年：2015
- 卷：137
- 期：22
- 页码：6999-7002
- 全文大小：291K
- ISSN：1520-5126
文摘
In this study, continuous zirconium(IV)-based metal鈥搊rganic framework (Zr-MOF) membranes were prepared. The pure-phase Zr-MOF (i.e., UiO-66) polycrystalline membranes were fabricated on alumina hollow fibers using an in situ solvothermal synthesis method. Single-gas permeation and ion rejection tests were carried out to confirm membrane integrity and functionality. The membrane exhibited excellent multivalent ion rejection (e.g., 86.3% for Ca2+, 98.0% for Mg2+, and 99.3% for Al3+) on the basis of size exclusion with moderate permeance (0.14 L m鈥? h鈥? bar鈥?) and good permeability (0.28 L m鈥? h鈥? bar鈥? 渭m). Benefiting from the exceptional chemical stability of the UiO-66 material, no degradation of membrane performance was observed for various tests up to 170 h toward a wide range of saline solutions. The high separation performance combined with its outstanding water stability suggests the developed UiO-66 membrane as a promising candidate for water desalination.