Detail publikačního výsledku

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

STYSKALIK, A.; ŠKODA, D.; MORAVEC, Z.; ROUPCOVÁ, P.; BARNES, C.; PINKAS, J.

Originální název

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

Anglický název

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

Druh

Článek WoS

Originální abstrakt

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.

Anglický abstrakt

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.

Klíčová slova

phosphoric-acid catalyst; organic-inorganic hybrid;sol-gel synthesis; phosphosilicate gels; ambient conditions; crystal-structure; molecular-sieves; surface-area; MAS NMR; glasses

Klíčová slova v angličtině

phosphoric-acid catalyst; organic-inorganic hybrid;sol-gel synthesis; phosphosilicate gels; ambient conditions; crystal-structure; molecular-sieves; surface-area; MAS NMR; glasses

Autoři

STYSKALIK, A.; ŠKODA, D.; MORAVEC, Z.; ROUPCOVÁ, P.; BARNES, C.; PINKAS, J.

Rok RIV

2020

Vydáno

01.01.2015

Nakladatel

Royal Society of Chemistry

Místo

CAMBRIDGE

ISSN

2046-2069

Periodikum

RSC Advances

Svazek

5

Číslo

90

Stát

Spojené království Velké Británie a Severního Irska

Strany od

73670

Strany do

73676

Strany počet

7

URL

https://pubs.rsc.org/en/content/articlehtml/2015/ra/c5ra10982e

Plný text v Digitální knihovně

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",
  url="https://pubs.rsc.org/en/content/articlehtml/2015/ra/c5ra10982e"
}

Dokumenty

c5ra10982e