Core-Shell Metal-Organic Frameworks with Improving Cyclic Stability for Water Adsorption
Journal
Journal of Chemical Engineering of Japan
Journal Volume
53
Journal Issue
8
Pages
376-382
Date Issued
2020
Author(s)
Chen, J.-J.
Chiu, H.-C.
Chang, C.-W.
Shen, C.-Y.
Kang, Y.-H.
Chi, H.-Y.
Chang, C.-K.
Chuang, Y.-C.
Abstract
MIL-lOO(Fe) is a metal-organic framework (MOf) with high water adsorption capacity but poor stability under continuous adsorptlon-desorptlon cycling. This paper reports on a novel method for Improving the cydlc adsorption stability of MIL-100{Fe) by coating It with ZIF-7 or ZIF-8 to form MOF-MOF composites. This process is meant to prevent the di rect exposure of MIL-100;Fe] to moisture, and thereby extend Its lifespan. The structure of resulting MIL-lOOZIF-7 and MIL-100(Fe)#'ZIF-8 was characterized using a number of solid-state techniques, indudlng scanning electron microscopy, energy dispersive spectroscopy, FT-IR spectroscopy, and powder X-ray diffraction with synchrotron source. Pure MIL-lOO(Fe) and the two composites were subjected to cydlc water adsorptlon-desorptlon tests at 25∗c under 80% relative humidity. After 25 cycles, the water adsorption capacity of pure MIL-IOO(Fe) dropped by approximately 30%. The adsorption uptake of the MOFs remained almost unchanged; however, their overall adsorption capacity is slightly lower than that of pure MIL-IOO(Fe).
SDGs
Type
journal article