期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 35, 页码 18770-18776出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta05800d
关键词
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资金
- Natural Science Foundation of China [21403155]
- Tianjin Natural Science Foundation [15JCYBJC17600]
- China Scholarship Council [201608120045]
- National Science Foundation (NSF), USA [DMR-1352065]
- University of South Florida (USF)
In this work, we demonstrate a facile molecular-level modification method that imparts superhydrophobic character to Zr-based MOFs, while retaining their high porosity. Alkyl phosphonic acids, such as n-octadecylphosphonic acid (OPA), interact with the zirconium oxide clusters situated near and on the surface of the MOF. The octadecyl alkyl chains reduce the surface free energy on the MOF's exterior, yielding a superhydrophobic material with a contact angle greater than 150 degrees. After exposure to aqueous solutions with a high pH and high ionic strength, the OPA-MOFs retain nearly identical surface areas. Notably, the OPA-MOFs are capable of separating organic liquids from water, which could facilitate oil/ water separation applications in the event of an oil spill.
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