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Supersonic cold spraying for zeolitic metal-organic framework films

Authors
Kim, Do-YeonJoshi, Bhavana N.Lee, Jong-GunLee, Jong-HyukLee, Ji SunHwang, Young KyuChang, Jong-SanAl-Deyab, SalemTan, Jin-ChongYoon, Sam S.
Issue Date
1-7월-2016
Publisher
ELSEVIER SCIENCE SA
Keywords
Metal-organic framework; Supersonic spray-coating
Citation
CHEMICAL ENGINEERING JOURNAL, v.295, pp.49 - 56
Indexed
SCIE
SCOPUS
Journal Title
CHEMICAL ENGINEERING JOURNAL
Volume
295
Start Page
49
End Page
56
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/88102
DOI
10.1016/j.cej.2016.03.029
ISSN
1385-8947
Abstract
We describe the first use of high-rate supersonic spray coating to deposit thin films of ZIF-8, a zeolitic metal-organic framework (MOF), adopting a sodalite architecture. This cold-spray technique is versatile and scalable, with tunable processing parameters capable of generating either a textured crystalline film or a randomly oriented polycrystalline coating on both metallic and non-metallic substrates. We provide evidence that guest occupancy by organic solvents (dimethylformamide, dimethylacetamide, and dimethylsulfoxide) in the sodalite cage of ZIF-8 structurally stabilizes the framework against high velocity impact, resulting in the preferred orientations observed. Moreover, we show that amorphous ZIF-8 films can be straightforwardly obtained at high air pressure exceeding 7 bars in which the particle velocity is 500 m/s. It is anticipated that this high-throughput approach can be adapted to fabricate microstructurally compact and strongly adhered ZIF-8 films. (C) 2016 Elsevier B.V. All rights reserved.
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