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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.


Representative TEM images of the prepared SZ-SiO2 samples. a Silica 3 (1.34 wt.% Zr). b Silica 4 (2.43 wt.% Zr). c Silica 8 (27.77 wt.% Zr).
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Figure 3: Representative TEM images of the prepared SZ-SiO2 samples. a Silica 3 (1.34 wt.% Zr). b Silica 4 (2.43 wt.% Zr). c Silica 8 (27.77 wt.% Zr).

Mentions: The TEM images of the SZ-SiO2 samples 3, 4 and 8 are shown in Figure 3. As seen from these images, silica does not possess long-range order, which is consistent with our observations when using similar templates to produce high surface area mesoporous silica [38]. In addition, no large clusters of nanoparticulate zirconia are visible at the magnifications used, which indicates that the zirconia is present as either very small nanoparticles or incorporated into the silica framework.


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)

Representative TEM images of the prepared SZ-SiO2 samples. a Silica 3 (1.34 wt.% Zr). b Silica 4 (2.43 wt.% Zr). c Silica 8 (27.77 wt.% Zr).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 3: Representative TEM images of the prepared SZ-SiO2 samples. a Silica 3 (1.34 wt.% Zr). b Silica 4 (2.43 wt.% Zr). c Silica 8 (27.77 wt.% Zr).
Mentions: The TEM images of the SZ-SiO2 samples 3, 4 and 8 are shown in Figure 3. As seen from these images, silica does not possess long-range order, which is consistent with our observations when using similar templates to produce high surface area mesoporous silica [38]. In addition, no large clusters of nanoparticulate zirconia are visible at the magnifications used, which indicates that the zirconia is present as either very small nanoparticles or incorporated into the silica framework.

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.