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Influence of the 2-methylimidazole/zinc nitrate hexahydrate molar ratio on the synthesis of zeolitic imidazolate framework-8 crystals at room temperature

Open access
Zhang, Yongyong, Jia, Ying, Li, Ming, Hou, Li’an·2018·Scientific Reports

Abstract

The effect of the 2-methylimidazole (Hmim)/zinc nitrate hexahydrate (Zn) molar ratio on the physicochemical characteristics of the zeolitic imidazolate framework-8 (ZIF-8) was investigated. ZIF-8 crystals were synthesized by mixing Hmim with Zn at room temperature without any additives in methanol solution. It was found that Hmim/Zn molar ratio had significant influence on the crystallinity, yield, particle size and porosity of ZIF-8. The samples synthesized at low Hmim/Zn molar ratio showed a cubic shape, whereas at higher Hmim/Zn ratios truncated rhombic dodecahedron or rhombic dodecahedron morphologies were obtained. The particle size is decreased upon increasing the Hmim/Zn molar ratio. Besides, higher Hmim/Zn molar ratio in a certain range resulted in improving crystallinity, yield, surface area and micropore volume of ZIF-8. The ZIF-8 crystals produced at Hmim/Zn molar ratio of 8 exhibited the best characteristics. The present work provides new insights in relation to the role of Hmim/Zn molar ratio on the synthesis process of ZIF-8.

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Metadata

Authors
Zhang, Y., Jia, Y., Li, M., & Hou, L.
Venue
Scientific Reports
Published
2018-06-25
Volume
8
Issue
1
Pages
9597-9597
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2809213248
Cited by
334
References
0
FWCI
3.73
Type
journal article
Language
en
Open access
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Zhang, Y., Jia, Y., Li, M., & Hou, L. (2018). Influence of the 2-methylimidazole/zinc nitrate hexahydrate molar ratio on the synthesis of zeolitic imidazolate framework-8 crystals at room temperature. Scientific Reports. https://doi.org/10.1038/s41598-018-28015-7

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