Analysis of the porosity of ZIF-8 and ZIF-8@CNF membranes using positron annihilation lifetime spectroscopy (PALS)

Zeolite imidazole framework (ZIF) are a family of metal-organic frameworks with nano-sized pores that can be used as membranes for highly selective gas separation. Currently, efforts are being made to control the pore size of ZIF for gas separation based on their kinetic diameters. In this study, th...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2023-10, Vol.332 (10), p.3967-3975
Main Authors: Tahir, Muhammad Shoaib, Lee, Je-Won, Rabani, Iqra, Afzal, Fatima, Han, Yun-Jae, Park, Han-Yeol, Lee, Jaegi, Seo, Young Soo
Format: Article
Language:English
Subjects:
Cellulose
Cellulose fibers
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Diameters
Forecasts and trends
Gas separation
Hadrons
Heavy Ions
Imidazole
Inorganic Chemistry
Membranes
Metal-organic frameworks
Nanoparticles
Nuclear Chemistry
Nuclear energy
Nuclear Physics
Physical Chemistry
Pore size
Porosity
Positron annihilation
Spectrum analysis
Substrates
Zeolites
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Summary:Zeolite imidazole framework (ZIF) are a family of metal-organic frameworks with nano-sized pores that can be used as membranes for highly selective gas separation. Currently, efforts are being made to control the pore size of ZIF for gas separation based on their kinetic diameters. In this study, the effects of a surfactant and cellulose nanofiber (CNF) as a substrate on the pore and crystal sizes were investigated. We measure pore size using positron annihilation lifetime spectroscopy. Results showed that the pore size decreases as the crystal size decreases. The pore size of the ZIF-8 nanoparticles grown on the CNF is 0.45 nm.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-023-09078-x