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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/116/05/0293-0300

    • Keywords

       

      Nanoparticles; platinum; phase transfer; hydrophobization; X-ray photoemission spectroscopy

    • Abstract

       

      In this report we demonstrate a simple process based on amine chemistry for the phase transfer of platinum nanoparticles from an aqueous to an organic solution. The phase transfer was accomplished by vigorous shaking of a biphasic mixture of platinum nanoparticles synthesised in an aqueous medium and octadecylamine (ODA) in hexane. During shaking of the biphasic mixture, the aqueous platinum nanoparticles complex via either coordination bond formation or weak covalent interaction with the ODA molecules present in the organic phase. This process renders the nanoparticles sufficiently hydrophobic and dispersible in the organic phase. The ODA-stabilised platinum nanoparticles could be separated out from hexane in the form of a powder that is readily redispersible in weakly polar and non-polar organic solvents. The ODA-capped platinum nanoparticles show high catalytic activity in hydrogenation reactions and this is demonstrated in the efficient conversion of styrene to ethyl benzene. The nature of binding of the ODA molecules to the platinum nanoparticles surface was characterised by thermogravimetry, transmission electron microscopy (TEM), X-ray photoemission spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR)

    • Author Affiliations

       

      Ashavani Kumar1 Hrushikesh M Joshi1 Anandrao B Mandale2 Rajendra Srivastava3 Suguna D Adyanthaya1 Renu Pasricha2 Murali Sastry1

      1. Materials Chemistry Division, National Chemical Laboratory, Pune - 411 008, India
      2. Catalysis Division, National Chemical Laboratory, Pune - 411 008, India
      3. Centre for Materials Characterisation, National Chemical Laboratory, Pune - 411 008, India
    • Dates

       
  • Journal of Chemical Sciences | News

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