Embedding colloidal nanoparticles inside mesoporous silica using gas expanded liquids for high loading recyclable catalysts

作者：Collins Gillian^*; Rahme Kamil; O'Connell John; Holmes Justin D

来源：Catalysis Science & Technology, 2016, 6(19): 7212-7219.

DOI：10.1039/c6cy00584e

The ability to tune the structural and chemical properties of colloidal nanoparticles (NPs) makes them highly advantageous for studying activity and selectivity dependent catalytic behaviour. Incorporating pre-synthesised colloidal NPs into porous support materials remains a challenge due to poor pore wetting and permeability. In this report, monodisperse, composition-controlled AgPd alloy NPs were synthesised and embedded into mesoporous silica SBA-15 using carbon dioxide and expanded hexane. 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.

• 出版日期2016