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Embedding colloidal nanoparticles inside mesoporous silica using gas expanded liquids for high loading recyclable catalysts
Collins, Gillian; Rahme, Kamil; O'Connell, John; Holmes, Justin D.
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.
Keyword(s): Colloidal nanoparticles; Porous supports materials; Pore permeability; High metal loading; Catalysis
Publication Date:
2016
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: University College Cork
Citation(s): 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
Publisher(s): Royal Society of Chemistry
File Format(s): application/pdf
First Indexed: 2016-10-02 05:44:02 Last Updated: 2016-10-14 06:58:42