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Synthesis of hybrid nanomaterials RuO2@SiO2

Mar Tristany 1Victor Matsura 2Yannick Guari 2Karine Philippot 1André Maisonnat 1Bruno Chaudret 1

1. Laboratoire de Chimie de Coordination (LCC), 205 route de Narbonne, Toulouse 31077, France
2. Institut Charles Gerhardt, UMR 5253, CNRS-UM2-ENSCM-UM1, Université de Monpellier 2, cc 1701, Montpellier 34095, France


Nanoparticles of metals or metal oxides are a subject of great interest in current research because of their unique physical and chemical properties which come from their high surface/volume ratio and from quantum size effects.1 Because of their particular properties, nanoparticles find applications in various fields such as electronics, optics, catalysis and magnetic storage media. Metal oxides nanoparticles are often used as sensitive layers in gas sensors,2 but sometimes display a lack of selectivity towards a target gas. To overcome these problems, membrane filters can be employed, but then comes the problem of saturation. Thus, the use of catalytic filters involving a porous material as a catalyst support is an alternative that can increase the selectivity of gas sensors.3 In this communication, an original way for the preparation of hybrid RuO2@SiO2 nanomaterials will be presented. The key point of this synthesis method is the use of ruthenium nanoparticles stabilized by a bifunctional ligand as building blocks. Such a ligand allows the nanoparticles stabilization in the first stage and then their assembly through the formation of silica by sol-gel process (Figure 1). Composite nanomaterials so-obtained can contain a high content of metallic nanoparticles dispersed in a matrix of silica. After calcination, hybrid RuO2@SiO2 nanomaterials are obtained. Such nanomaterials were used as catalytic filters for selective detection gaz4

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Presentation: Oral at E-MRS Fall Meeting 2009, Symposium I, by Mar Tristany
See On-line Journal of E-MRS Fall Meeting 2009

Submitted: 2009-05-06 17:56
Revised:   2009-06-07 00:48