Palladium nanostructures: Solvent-less, one-pot mechano-chemical synthesis using poly(vinylpyrolidone) and catalytic activity

• A facile, one-pot and solvent-less mechano-chemical approach.
• A ‘green approach’ as it utilizes only biocompatible PVP and metal precursor.
• Possible to produce nanoparticles in large scale and stored them for longer time.
• No manipulative skills are needed to separate the particles in solid state.

Palladium nanoparticles are synthesized by an one-step, solvent-less, mechano-chemical reduction of potassium tetrachloropalladate(II) using an amphiphilic organic polymer, poly(vinylpyrrolidone). We demonstrate that poly(vinylpyrrolidone) can act both as reducing as well as capping agent in the solid state, without a solvent, for the synthesis of palladium nanoparticles at room temperature in conjunction with vibration milling. Besides, as an example, the application of the dendritic-like palladium nanoparticles as a catalyst is also investigated for the reduction reaction of 4-nitrophenol to 4-aminophenol at room temperature.

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