Tuesday publication update! The authors on this paper visualized titanium-based metal-organic frameworks (MOFs) under gas atmosphere and in the TEM using the #AtmosphereAX system. The authors looked at the mechanisms behind their pyrolytic conversion using in situ gas phase electron microscopy.
️ This research showed that around 350°C, the MOF framework begins to collapse, breaking coordination and covalent bonds between organic linkers and Ti oxo-clusters. By 450°C, further fragmentation causes particle shrinkage.
The MOFs pore size increases from 0.7 nm to 1.4 nm at 800°C, forming mesopores. The particles experience approximately 35% volume shrinkage, but retain their original 3D tetragonal disc-like morphology.
✨ The resulting N and/or C self-doped TiO2 nanoparticles are homogeneously distributed within a porous carbon matrix, maintaining high crystallinity and the original morphology of the MOF precursor.
This study provides a comprehensive understanding of the thermal conversion of MOFs, paving the way for the rational design and selection of derived composites for advanced catalytic applications.
Want to read the entire paper?
https://www.doi.org/10.1002/adma.201703460
Want to know more about the Atmosphere system for heterogeneous catalysis?
#Protochips #FindYourBreakthrough #InSituGasPhaseTEM #TEM #InSituMicroscopy
