Publication detail

Non-aqueous template-assisted synthesis of mesoporous nanocrystalline silicon orthophosphate

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"
}