Publication: Room Temperature Synthesis and Characterizations of ZIF-8 Formation at Water-Fatty Alcohols Interface
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Date
2018
Authors
Misran H.
Mahadi N.
Othman S.Z.
Lockman Z.
Amin N.
Matsumoto A.
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Physics Publishing
Abstract
In this study, Zn based ZIF-8 metal-organic framework were successfully synthesized in a green synthesis approach eliminating hazardous solvents and the need to use surfactant. In this method, the syntheses were done at room temperature followed by a simple hydrothermal method using palm oil derived fatty alcohols (PODFA) with 12 carbon chain in various solvents. The effect of several co-solvents on the formation of ZIF-8 materials and on morphology were investigated. The peak positions agreed well with the simulated ZIF-8. However, as the co-solvents became more polar the (011) peak shifted to a higher 2? value suggesting that the interplanar d-spacing were reduced. The addition of fatty alcohols promoted the formation of MOF-5 and ZIF-8 at the water-fatty alcohols interfaces by viscosity lowering effect similar to those when using commercial surfactants. The mechanism of the formation was suggested to be similar to those at water-alcohol insoluble monolayer interfaces at the liquid-gas interaction. As the polarity of solvents increased, the miscibility of Zn2+ ions and deprotonated methylimidazole linkers were enhanced causing higher interaction with metal ions which resulted in a smaller unit cell. ZIF-8 exhibited elongated rhombic dodecahedron and truncated dodecahedron morphology at less than 100 nm. � Published under licence by IOP Publishing Ltd.
Description
Alcohols; Crystalline materials; Liquefied gases; Metal ions; Metals; Organometallics; Palm oil; Solvents; Surface active agents; Commercial surfactants; Hazardous solvents; Hydrothermal methods; Insoluble monolayer; Metal organic framework; Methylimidazole; Rhombic dodecahedron; Room temperature synthesis; Phase interfaces