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Ionic liquid-templated preparation of mesoporous silica embedded with nanocrystalline sulfated zirconia.

Ward AJ, Pujari AA, Costanzo L, Masters AF, Maschmeyer T - Nanoscale Res Lett (2011)

Bottom Line: A series of mesoporous silicas impregnated with nanocrystalline sulphated zirconia was prepared by a sol-gel process using an ionic liquid-templated route.The physicochemical properties of the mesoporous sulphated zirconia materials were studied using characterisation techniques such as inductively coupled optical emission spectroscopy, X-ray diffraction, transmission electron microscopy, energy-dispersive X-ray microanalysis, elemental analysis and X-ray photoelectron spectroscopy.Analysis of the new silicas indicates isomorphous substitution of silicon with zirconium and reveals the presence of extremely small (< 10 nm) polydispersed zirconia nanoparticles in the materials with zirconium loadings from 27.77 to 41.4 wt.%.

View Article: PubMed Central - HTML - PubMed

Affiliation: Laboratory for Advanced Catalysis for Sustainability, School of Chemistry, The University of Sydney, Bldg, F11, Sydney, NSW 2006, Australia. th.maschmeyer@chem.usyd.edu.au.

ABSTRACT
A series of mesoporous silicas impregnated with nanocrystalline sulphated zirconia was prepared by a sol-gel process using an ionic liquid-templated route. The physicochemical properties of the mesoporous sulphated zirconia materials were studied using characterisation techniques such as inductively coupled optical emission spectroscopy, X-ray diffraction, transmission electron microscopy, energy-dispersive X-ray microanalysis, elemental analysis and X-ray photoelectron spectroscopy. Analysis of the new silicas indicates isomorphous substitution of silicon with zirconium and reveals the presence of extremely small (< 10 nm) polydispersed zirconia nanoparticles in the materials with zirconium loadings from 27.77 to 41.4 wt.%.

No MeSH data available.


Schematic representation of the syntheses of SZ-SiO2 materials.
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Figure 1: Schematic representation of the syntheses of SZ-SiO2 materials.

Mentions: The mesoporous silicas impregnated with sulphated zirconia (2 to 9) were prepared using a modification of the method described by Du et al. [47]. The method (schematically represented in Figure 1) involved the hydrolysis of the silica precursor (TEOS) in dilute HCl in the presence of the template 1-hexadecyl-3-methylimdazolium bromide at 40°C for 4 h, after which time the required amount of ZrOCl2·8H2O was added to achieve the desired Si/Zr ratio. In addition, a purely siliceous material (1) was prepared using an identical process. This synthesis differs from that of Zr-TUD-1 in that it does not proceed through silatrane intermediates [45].


Ionic liquid-templated preparation of mesoporous silica embedded with nanocrystalline sulfated zirconia.

Ward AJ, Pujari AA, Costanzo L, Masters AF, Maschmeyer T - Nanoscale Res Lett (2011)

Schematic representation of the syntheses of SZ-SiO2 materials.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211248&req=5

Figure 1: Schematic representation of the syntheses of SZ-SiO2 materials.
Mentions: The mesoporous silicas impregnated with sulphated zirconia (2 to 9) were prepared using a modification of the method described by Du et al. [47]. The method (schematically represented in Figure 1) involved the hydrolysis of the silica precursor (TEOS) in dilute HCl in the presence of the template 1-hexadecyl-3-methylimdazolium bromide at 40°C for 4 h, after which time the required amount of ZrOCl2·8H2O was added to achieve the desired Si/Zr ratio. In addition, a purely siliceous material (1) was prepared using an identical process. This synthesis differs from that of Zr-TUD-1 in that it does not proceed through silatrane intermediates [45].

Bottom Line: A series of mesoporous silicas impregnated with nanocrystalline sulphated zirconia was prepared by a sol-gel process using an ionic liquid-templated route.The physicochemical properties of the mesoporous sulphated zirconia materials were studied using characterisation techniques such as inductively coupled optical emission spectroscopy, X-ray diffraction, transmission electron microscopy, energy-dispersive X-ray microanalysis, elemental analysis and X-ray photoelectron spectroscopy.Analysis of the new silicas indicates isomorphous substitution of silicon with zirconium and reveals the presence of extremely small (< 10 nm) polydispersed zirconia nanoparticles in the materials with zirconium loadings from 27.77 to 41.4 wt.%.

View Article: PubMed Central - HTML - PubMed

Affiliation: Laboratory for Advanced Catalysis for Sustainability, School of Chemistry, The University of Sydney, Bldg, F11, Sydney, NSW 2006, Australia. th.maschmeyer@chem.usyd.edu.au.

ABSTRACT
A series of mesoporous silicas impregnated with nanocrystalline sulphated zirconia was prepared by a sol-gel process using an ionic liquid-templated route. The physicochemical properties of the mesoporous sulphated zirconia materials were studied using characterisation techniques such as inductively coupled optical emission spectroscopy, X-ray diffraction, transmission electron microscopy, energy-dispersive X-ray microanalysis, elemental analysis and X-ray photoelectron spectroscopy. Analysis of the new silicas indicates isomorphous substitution of silicon with zirconium and reveals the presence of extremely small (< 10 nm) polydispersed zirconia nanoparticles in the materials with zirconium loadings from 27.77 to 41.4 wt.%.

No MeSH data available.