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Aqueous room temperature synthesis of zeolitic imidazole framework 8 (ZIF-8) with various concentrations of triethylamine

Md. Nordin, Nik Abdul Hadi and Ismail, Ahmad Fauzi and Mustafa, Azeman and Goh, Peisean S. and Rana, D. and Matsuura, Takeshi (2014) Aqueous room temperature synthesis of zeolitic imidazole framework 8 (ZIF-8) with various concentrations of triethylamine. RSC Advances, 4 (63). pp. 33292-33300. ISSN 2046-2069

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Official URL: http://dx.doi.org/10.1039/c4ra03593c

Abstract

In this study, a zeolitic imidazole framework (ZIF-8) was prepared, and physico-chemical characterizations were performed to investigate the influences of triethylamine (TEA) on the crystallinity, particle size, morphology, and defects of ZIF-8 synthesized via an aqueous room temperature approach with a relatively low molar ratio of ligands to metal salts. Increasing the concentration of TEA by raising the TEA/total molar ratio from 0.004 to 0.007 prompted the formation of pure phase ZIF-8, whereas a TEA/total molar ratio below 0.004 did not result in a yield of ZIF-8. The particle size of ZIF-8 decreased from approximately 288 to 133 nm with increasing TEA/total molar ratio, except at a TEA/total molar ratio of 0.007. However, an excessive TEA/total molar ratio alters the 2-MeIM chemistry, and partially forms hydroxylated 2-MeIM. Thus, this study shows that at relatively low molar ratios of ligands to metal salts, up to a maximum TEA/total molar ratio of 0.006, the TEA concentration plays an important role in assisting crystal formation and in controlling the particle size of ZIF-8. The proposed procedure enables pure phase nanoscale ZIF-8 to be synthesized with a high product yield and with minimal chemical usage

Item Type:Article
Uncontrolled Keywords:crystal formation, crystallinities, molar ratio, physico-chemical characterization, product yields, room temperature, room temperature synthesis, triethylamines
Subjects:T Technology > TN Mining engineering. Metallurgy
Divisions:Petroleum and Renewable Energy Engineering
ID Code:51918
Deposited By: Siti Nor Hashidah Zakaria
Deposited On:01 Feb 2016 11:51
Last Modified:27 Aug 2018 11:41

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