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Magnetically Recyclable Catalytc Carbon Nanoreactors

We explore the derivatisation of a tubular, carbon-based support, graphitised carbon nanofibers (GNF), with nanoscale magnets to enable magnetically induce separation of the solid catalyst from the reaction solution. We explore both the non-covalent attachment of commercially available graphene-like carbon coated magnetic Co nanomagnets (Co@C n ), and the in-situ formation of carbon coated iron nanomagnets (Fe@C n ) from a pre-encapsulated iron complex precursor. Characterisation of the composite materials by high resolution transmission electron microscopy (HRTEM) showed that Co@C n and Fe@C n successfully attached to the GNFs and the minimum amount of nanomagnets required to enable complete separation of the nanotubes from the solution with an external magnetic field is quantified using UV/Vis spectroscopy. Magnetic functionalised materials were then combined with uncoated, palladium and platinum catalytic nanoparticles and the resultant catalytically active and magnetically separable hybrid materials were investigated in the reduction of nitrobenzene. The recyclability and