[Ru(0)]@SiO_2 and [RuO_2]@SiO_2 Hybrid Nanomaterials: From Their Synthesis to Their Application as Catalytic Filters for Gas Sensors

摘要

[Ru(0)]@SiO_2 and [RuO_2]@SiO_2 hybrid nanomaterials are produced following a facile method consisting of the synthesis of size-controlled ruthenium nanoparticies as elemental bricks. This route takes advantage of the orgartometallic approach and the use of a bifunctional ligand for the synthesis of ruthenium nanoparticies from [Ru(COD)(COT)] (COD = 1,3-cydooctadiene, COT = 1,3,5-cyclooctatriene) as metal precursor and (PhCH_2)_2N(CH_2)_(11)O(CH_2)_3Si(OEt)_3 (benzenemethanamine) as stabilizer. Hydrolysis and polycondensation steps via a sol-gel approach lead to the formation of the silica materials containing the metal nanoparticies. A final calcination step in air at 400℃ yields the [RuO_2]@SiO_2 nanocomposites. Such hybrid nanomaterials display a good dispersion of the nanoparticies inside the silica matrix and interesting porosity properties making them attractive materials for catalytic applications. This is shown by using [RuO_2]@SiO_2 hybrid nanomaterials as catalytic filters for gas sensors.