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Restriction lift date:2017-07-11
Citation:Collins, G., Rahme, K., O’Connell, J., and Holmes, Justin D. (2016) ‘Embedding colloidal nanoparticles inside mesoporous silica using gas expanded liquids for high loading recyclable catalysts’, Catalysis Science and Technology, 6(19), pp 7212-7219. doi: 10.1039/C6CY00584E
The ability to tune the structural and chemical properties of colloidal nanoparticles (NPs), make them highly advantageous for studying activity and selectivity dependent catalytic behaviour. Incorporating pre-synthesized colloidal NPs into porous supports materials remains a challenge due to poor wetting and pore permeability. In this report monodisperse, composition controlled AgPd alloy NPs were synthesised and embedded into SBA-15 using supercritical carbon dioxide and hexane. Supercritical fluid impregnation resulted in high metal loading without the requirement for surface pre-treatments. The catalytic activity, reaction profiles and recyclability of the alloy NPs embedded in SBA-15 and immobilised on non-porous SiO2 are evaluated. The NPs incorporated within the SBA-15 porous network showed significantly greater recyclability performance compared to non-porous SiO2.
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