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STYSKALIK, A. ŠKODA, D. MORAVEC, Z. ROUPCOVÁ, P. BARNES, C. PINKAS, J.
Original Title
Non-aqueous template-assisted synthesis of mesoporous nanocrystalline silicon orthophosphate
Type
journal article in Web of Science
Language
English
Original Abstract
The first synthesis of mesoporous nanocrystalline silicon orthophosphate Si5P6O25 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)(4), and tris(trimethylsilyl) phosphate, OP(OSiMe3)(3) (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 SiO6 moieties. After burning out the template, mesoporous silicon orthophosphate was obtained with surface areas up to 128 m(2) g(-1) and pore sizes around 20 nm. The nanocrystalline Si5P6O25 phase forms relatively easily (500 degrees C, 4 h) in comparison with other synthetic routes. All samples were characterized by SEM, TEM, elemental analysis, TGA, nitrogen adsorption, SAXS, H-1, C-13, Si-29, and P-31 solid-state NMR spectroscopy, and powder XRD. These xerogels showed superior catalytic activity and selectivity in methylstyrene dimerization.
Keywords
phosphoric-acid catalyst; organic-inorganic hybrid;sol-gel synthesis; phosphosilicate gels; ambient conditions; crystal-structure; molecular-sieves; surface-area; MAS NMR; glasses
Authors
STYSKALIK, A.; ŠKODA, D.; MORAVEC, Z.; ROUPCOVÁ, P.; BARNES, C.; PINKAS, J.
Released
1. 1. 2015
Publisher
Royal Society of Chemistry
Location
CAMBRIDGE
ISBN
2046-2069
Periodical
RSC Advances
Year of study
5
Number
90
State
United Kingdom of Great Britain and Northern Ireland
Pages from
73670
Pages to
73676
Pages count
7
URL
https://pubs.rsc.org/en/content/articlehtml/2015/ra/c5ra10982e
Full text in the Digital Library
http://hdl.handle.net/11012/201732
BibTex
@article{BUT163293, author="Aleš {Styskalik} and David {Škoda} and Zdeněk {Moravec} and Pavla {Roupcová} and Craig E. {Barnes} and Jiří {Pinkas}", title="Non-aqueous template-assisted synthesis of mesoporous nanocrystalline silicon orthophosphate", journal="RSC Advances", year="2015", volume="5", number="90", pages="73670--73676", doi="10.1039/c5ra10982e", issn="2046-2069", url="https://pubs.rsc.org/en/content/articlehtml/2015/ra/c5ra10982e" }