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Fabrication of yolk–shell Pd@ZIF-8 nanoparticles with excellent catalytic size-selectivity for the hydrogenation of olefins
- Source :
- CrystEngComm. 18:1760-1767
- Publication Year :
- 2016
- Publisher :
- Royal Society of Chemistry (RSC), 2016.
-
Abstract
- In this work, we fabricate new yolk–shell Pd@ZIF-8 (ZIF = zeolitic imidazolate framework) nanoparticles (NPs) through reactions of the preformed core–shell Pd@ZnO NPs with 2-methylimidazole under mild conditions. In this method, ZnO is used as the self-template and the Zn2+ source for the formation of the ZIF-8 shell. The morphology, composition and structure of the as-prepared yolk–shell nanomaterial are characterized by scanning electron microscopy, transmission electron microscopy, high resolution transmission electron microscopy, powder X-ray diffraction, energy dispersive X-ray spectroscopy, and inductively coupled plasma atomic emission spectroscopy. The formation of this well-defined yolk–shell nanostructure is highly dependent on the solvent system and reaction time. This nanomaterial can be employed as an excellent heterogeneous catalyst for the liquid-phase hydrogenation of olefins with high size-selectivity at room temperature, which is mainly due to the inherent porous structure of the outer ZIF-8 shell along with the enclosed Pd NPs. The nanocatalyst system can be recycled at least three times without any evident loss of the catalytic efficiency.
- Subjects :
- Nanostructure
Materials science
Scanning electron microscope
Analytical chemistry
Nanoparticle
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
Nanomaterials
Catalysis
Chemical engineering
Transmission electron microscopy
General Materials Science
0210 nano-technology
High-resolution transmission electron microscopy
Zeolitic imidazolate framework
Subjects
Details
- ISSN :
- 14668033
- Volume :
- 18
- Database :
- OpenAIRE
- Journal :
- CrystEngComm
- Accession number :
- edsair.doi...........31bd51851375b0795767d893e29e0e8a