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Single-step synthesis and interface tuning of core–shell metal–organic framework nanoparticles
- Source :
- Chemical Science
- Publication Year :
- 2021
-
Abstract
- Control over the spatial distribution of components in metal–organic frameworks has potential to unlock improved performance and new behaviour in separations, sensing and catalysis. We report an unprecedented single-step synthesis of multi-component metal–organic framework (MOF) nanoparticles based on the canonical ZIF-8 (Zn) system and its Cd analogue, which form with a core–shell structure whose internal interface can be systematically tuned. We use scanning transmission electron microscopy, X-ray energy dispersive spectroscopy and a new composition gradient model to fit high-resolution X-ray diffraction data to show how core–shell composition and interface characteristics are intricately controlled by synthesis temperature and reaction composition. Particle formation is investigated by in situ X-ray diffraction, which reveals that the spatial distribution of components evolves with time and is determined by the interplay of phase stability, crystallisation kinetics and diffusion. This work opens up new possibilities for the control and characterisation of functionality, component distribution and interfaces in MOF-based materials.<br />Core–shell metal–organic framework nanoparticles have been synthesised in which the internal interface and distribution of components is found to be highly tunable using simple variations in reaction conditions.
- Subjects :
- Diffraction
Materials science
Component (thermodynamics)
Diffusion
Energy-dispersive X-ray spectroscopy
Nanoparticle
DAS
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
QD Chemistry
01 natural sciences
0104 chemical sciences
3. Good health
Chemistry
Chemical physics
Scanning transmission electron microscopy
Particle
Metal-organic framework
QD
0210 nano-technology
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Chemical Science
- Accession number :
- edsair.doi.dedup.....ce87ddfdbe25c7527ab24fff577a35d2