sol-gel method

Characterization and Properties of Titanium(IV) Oxide, Synthesized by Different Routes

The article considers the influence of precursor type and sol-gel synthesis conditions of TiO2 on its properties. The obtained TiO2 samples were characterized by X-ray diffraction methods, electron microscopy, as a result of which it was found that all the obtained TiO2 powders have the crystallite size in a nanorange of 2.5–17 nm. It was shown that sorption-photocatalytic properties of TiO2 significantly depend on a phase composition, surface acidity, specific surface area and porosity.

Epoxy-Silica Nanocomposites Based on Ethoxysilanes and Diglycidyl Ether of Dicyclohexylpropane

Sol-gel method was used to obtain epoxy-silica nanocomposites cured with dicarboxylic acid anhydride. Incorporation of filler into the system leads to plastisization of organic matrix: glass transition temperature decreases and sol-faction yield increases with filler content. At w(SiO2) = 0.5–3 mas % effect of low additions is observed: molecular weight of chain between junctions decreases and thermostability of hybrid materials rises.

Synthesis and Characterization of Organic-Inorganic Membranes Containing Sulphogroups

Organic-inorganic materials have been synthesized by photoinitiated copolymerization of monomers: acrylonitrile, acrylamide and 3-sulphopropyl acrylate potassium salt in the presence of sol-gel systems based on tetraethoxysilane. Thermal stability, water uptake and ion-exchange capacity of obtained materials have been determined. Undertaken studies may be used for development of protonconductive membrane for fuel cells.

Synthesis, Structural and Physicochemical Characterization of BaFe1-xAlxO3−δ Oxides

In this study, BaFe1−xAlxO3-δ (0 ≤ x ≤ 0.3) perovskite-type oxides were prepared by sol-gel method using citric acid as chelating agent. The samples were subjected to various calcination temperatures in order to investigate the physicochemical properties of the oxide affected by the parameter. Thermogravimetric analysis, Fourier transform infrared spectroscopy and X-ray diffraction (XRD) techniques are used to explore precursor decomposition and to establish adequate calcination temperature for the preparation of the nano-powders.