Issue 40, 2017

Monitoring thermally induced structural deformation and framework decomposition of ZIF-8 through in situ temperature dependent measurements

Abstract

ZIF-8 is an easily synthesized porous material which is widely applied in gas storage/separation, catalysis, and nanoarchitecture fabrication. Thermally induced atomic displacements and the resultant framework deformation/collapse significantly influence the application of ZIF-8, and therefore, in situ temperature dependent FTIR spectroscopy was utilized to study the framework changes during heating in the oxidative environment. The results suggest that ZIF-8 undergoes three transition stages, which are the lattice expansion stage below 200 °C, the “reversible” structural deformation stage from 200 to 350 °C, and the decomposition/collapse stage over 350 °C. Our research indicates that the Zn–N bond breaks at a temperature of 350 °C in the oxidant environment, leading to a drastic deformation of the ZIF-8 structure.

Graphical abstract: Monitoring thermally induced structural deformation and framework decomposition of ZIF-8 through in situ temperature dependent measurements

Supplementary files

Article information

Article type
Paper
Submitted
12 Jul 2017
Accepted
08 Aug 2017
First published
08 Aug 2017

Phys. Chem. Chem. Phys., 2017,19, 27178-27183

Monitoring thermally induced structural deformation and framework decomposition of ZIF-8 through in situ temperature dependent measurements

B. Xu, Y. Mei, Z. Xiao, Z. Kang, R. Wang and D. Sun, Phys. Chem. Chem. Phys., 2017, 19, 27178 DOI: 10.1039/C7CP04694D

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