Synthesis of nanostructured composite materials of MoO3/TiO2-SiO2 with spherical shape prepared with resins

Abstract

The aim of this work was to synthesize of nanostructured MoO 3 /TiO 2 -SiO 2 composites with hollow spherical shape by thermal decomposition of anion exchangers saturated with Mo 7 O 6− 24 ions and treated with the TBT-TEOS sol. The effect of the kinetics (Kissinger and the Metzger-Horowitz methods) of thermal decomposition of resins of porous and gel structures on the size of MoO 3 nanoparticles and the strength of MoO 3 /TiO 2 -SiO 2 spheres was shown. The formation of dense spherical nanostructured agglomerates of the composite is facilitated by reactions occurring at the interface between the phases of cylindrical and spherical symmetry when using an anion exchange resin with a porous structure. The decomposition reactions of the anion-exchange resin of the gel structure, accompanied by random nucleation, lead to the formation of hollow spherical agglomerates of the composite with cracks on the surface. The materials were characterized by DSC-TGA, XRD and SEM.

Sol–Gel Synthesis of LiTiO2 and LiBO2 and Their CO2 Capture Properties

“…The rate-determining step of CO2 capture in the instance of LiTiO2 is likewise assumed to be its dispersion in the chemical process of diffusion. In Figure 9, data analysis shows that the highest correlation coefficient is achieved between 293 K and 393 K when the Yander equation [38] and Gistling equation [39] are fit. The formula of interactions restricted by contact processes just fits for the absorption at low temperature (293 K) and fails at high temperature due to the change of shape of the LiTiO 2 particle and the thickness of the product layer.…”