Influence of Selected Alkoxysilanes on Dispersive Properties and Surface Chemistry of Titanium Dioxide and TiO2–SiO2Composite Material

The paper reports on characterisation of titanium dioxide and coprecipitated TiO2–SiO2composite material functionalised with selected alkoxysilanes. Synthetic composite material was obtained by an emulsion method with cyclohexane as the organic phase, titanium sulfate as titanium precursor, and sodium silicate solution as precipitating agent were applied. Structures of titania and composite material samples were studied by the wide angle X-ray scattering method. The chemical composition of TiO2–SiO2composite material precipitated was evaluated based on the energy dispersive X-ray spectroscopy technique. The functionalised TiO2and TiO2–SiO2composite material were thoroughly characterised to determine the yield of functionalisation with silanes. The characterisation included determination of dispersion and morphology of the systems (particle size distribution, scanning electron microscope images), adsorption properties (nitrogen adsorption isotherms), and electrokinetic properties (zeta potential).

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Comparative Characterization of Carbon Adsorbents and Polymer Precursors by Small-Angle X-ray Scattering and Nitrogen Adsorption Methods

The Journal of Physical Chemistry C ◽

10.1021/jp201835r ◽

2011 ◽

Vol 115 (21) ◽

pp. 10727-10735 ◽

Cited By ~ 22

Author(s):

V. M. Gun’ko ◽

S. T. Meikle ◽

O. P. Kozynchenko ◽

S. R. Tennison ◽

F. Ehrburger-Dolle ◽

...

Keyword(s):

Small Angle ◽

Nitrogen Adsorption ◽

Carbon Adsorbents ◽

X Ray ◽

Comparative Characterization ◽

Polymer Precursors ◽

X Ray Scattering ◽

Ray Scattering

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Small-angle X-ray scattering analysis of nanophase titanium dioxide, poly[N-(4-sulfophenyl)aniline], and their composite

Journal of Applied Polymer Science ◽

10.1002/app.12147 ◽

2003 ◽

Vol 88 (14) ◽

pp. 3183-3187

Author(s):

Nachagoni Narsimlu ◽

Yen-Ding Kuo ◽

Chun-Guey Wu

Keyword(s):

Titanium Dioxide ◽

Small Angle ◽

X Ray ◽

X Ray Scattering ◽

Ray Scattering

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Local Atomic Structures in Amorphous and Quasicrystalline Zr70Ni10Pt20and Zr80Pt20Alloys by the Anomalous X-ray Scattering Method

MRS Proceedings ◽

10.1557/proc-644-l1.1 ◽

2000 ◽

Vol 644 ◽

Cited By ~ 2

Author(s):

Eiichiro Matsubara ◽

Takahiro Nakamura ◽

Masaki Sakurai ◽

Muneyuki Imafuku ◽

Shigeo Sato ◽

...

Keyword(s):

Short Range ◽

Short Range Order ◽

Nearest Neighbor ◽

Scattering Method ◽

X Ray ◽

Coordination Numbers ◽

Atomic Structures ◽

X Ray Scattering ◽

Icosahedral Clusters ◽

Ray Scattering

AbstractLocal atomic structures around Zr and Pt in a quasicrystalline Zr80Pt20alloy, and amorphous and quasicrystalline Zr70Ni10Pt20alloys have been determined by the anomalous x-ray scattering (AXS) method. A distinct prepeak observed in an intensity profile of the amorphous Zr70Ni10Pt20alloy indicates existence of strong chemical short-range order (CSRO) clusters in the amorphous phase. Total coordination numbers around Zr and Pt in a nearest neighbor region in both alloys have been evaluated. The values around Pt are almost equal to 12 in the amorphous and quasicrystalline states suggest formation of icosahedral clusters around Pt. Some of crystalline structures formed from the quasicrystalline phases by annealing consist of icosahedral clusters of Zr and Ni atoms, or polyhedral clusters of Zr and Pt atoms similar with icosahedral clusters. The present result appears to support that the phase transformation from the amorphous to the crystal through the quasicrystal is explained by the icosahedral CSRO clusters in the amorphous and quasicrystalline states.

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