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Agglomerated polymer monoliths with bimetallic nano-particles as flow-through micro-reactors

Citation

Floris, P and Twamley, B and Nesterenko, PN and Paull, B and Connolly, D, Agglomerated polymer monoliths with bimetallic nano-particles as flow-through micro-reactors, Microchimica Acta, 179, (1-2) pp. 149-156. ISSN 0026-3672 (2012) [Refereed Article]

Copyright Statement

Copyright 2012 Springer-Verlag

DOI: doi:10.1007/s00604-012-0865-7

Abstract

Polymer monoliths in capillary format have been prepared as solid supports for the immobilisation of platinum/palladium bimetallic nano-flowers. Optimum surface coverage of nano-flowers was realised by photografting the monoliths with vinyl azlactone followed by amination with ethylenediamine prior to nano-particle immobilisation. Field emission SEM imaging was used as a characterisation tool for evaluating nano-particle coverage, together with BET surface area analysis to probe the effect of nano-particle immobilisation upon monolith morphology. Ion exchange chromatography was also used to confirm the nature of the covalent attachment of nano-flowers on the monolithic surface. In addition, EDX and ICP analyses were used to quantify platinum and palladium on modified polymer monoliths. Finally the catalytic properties of immobilised bimetallic Pd/Pt nano-flowers were evaluated in flow-through mode, exploiting the porous interconnected flow-paths present in the prepared monoliths (pore diameter~1-2 ým). Specifically, the reduction of Fe (III) to Fe (II) and the oxidation of NADH to NAD + were selected as model redox reactions. The use of a porous polymer monolith as an immobilisation substrate (rather than aminated micro-spheres) eliminated the need for a centrifugation step after the reaction.

Item Details

Item Type:Refereed Article
Keywords:nano-particles, agglomerated monolith, micro-reactor, flow-throguh catalysis
Research Division:Chemical Sciences
Research Group:Macromolecular and Materials Chemistry
Research Field:Physical Chemistry of Materials
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Nesterenko, PN (Professor Pavel Nesterenko)
Author:Paull, B (Professor Brett Paull)
ID Code:81023
Year Published:2012
Web of Science® Times Cited:6
Deposited By:Austn Centre for Research in Separation Science
Deposited On:2012-11-21
Last Modified:2014-11-20
Downloads:0

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