Non-aqueous template-assisted synthesis of mesoporous nanocrystalline silicon orthophosphate
RSC Advances, ISSN: 2046-2069, Vol: 5, Issue: 90, Page: 73670-73676
2015
- 19Citations
- 21Captures
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Article Description
The first synthesis of mesoporous nanocrystalline silicon orthophosphate SiPO is presented. The synthetic procedure is based on the non-hydrolytic sol-gel reaction in the presence of Pluronic P123 template and subsequent calcination in air. The condensation of silicon acetate, Si(OAc), and tris(trimethylsilyl)phosphate, OP(OSiMe) (TTP), in non-aqueous solvents driven by elimination of trimethylsilyl acetate provides a homogeneous network with a high content of Si-O-P bonds and SiO moieties. After burning out the template, mesoporous silicon orthophosphate was obtained with surface areas up to 128 m g and pore sizes around 20 nm. The nanocrystalline SiPO phase forms relatively easily (500 °C, 4 h) in comparison with other synthetic routes. All samples were characterized by SEM, TEM, elemental analysis, TGA, nitrogen adsorption, SAXS, H, C, Si, and P solid-state NMR spectroscopy, and powder XRD. These xerogels showed superior catalytic activity and selectivity in methylstyrene dimerization.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84940990342&origin=inward; http://dx.doi.org/10.1039/c5ra10982e; https://xlink.rsc.org/?DOI=C5RA10982E; http://xlink.rsc.org/?DOI=C5RA10982E; http://pubs.rsc.org/en/content/articlepdf/2015/RA/C5RA10982E; https://dx.doi.org/10.1039/c5ra10982e; https://pubs.rsc.org/en/content/articlelanding/2015/ra/c5ra10982e
Royal Society of Chemistry (RSC)
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