Simultaneous creation of metal nanoparticles in metal organic frameworks via spray drying technique

- Spray-dry technique was applied to synthesis Pd@ZIF-8.
- With this technique Pd@ZIF-8 was prepared without employing any stabilizer or surfactant.
- The synthesis procedure is included just one step.
- Characterization of pd@ZIF-8 demonstrated the presence of Pd nano-particles inside the ZIF-8 structure.
- Pd@ZIF-8 as a heterogeneous catalyst showed excellent activity in alkene hydrogenation.

In-situ fabrication of palladium(0) nanoparticles inside zeolitic imidazolate frameworks (ZIF-8) has been established via one-step facile spray-dry technique. Crystal structures and morphologies of the Pd@ZIF-8 samples are investigated by powder XRD, TEM, SAED, STEM, and EDX techniques. High angle annular dark field scanning transmission electron microscopy (HAAD-STEM) and 3D tomographic analysis confirm the presence of palladium nanoparticles inside the ZIF-8 structure. The porosity, surface area and N2 physisorption properties are evaluated for Pd@ZIF-8 with various palladium contents. Furthermore, Pd@ZIF-8 samples are effectively applied as heterogeneous catalysts in alkenes hydrogenation. This straightforward method is able to speed up the synthesis of encapsulation of metal nanoparticles in metal organic frameworks.

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