Estudo Da Obtenção De Nanopartículas De Tio2 Pelos Métodos Solvotérmico Assistido Por Micro-Ondas E Sol-Gel

Abstract

Nanoparticles of titanium oxide (TiO 2 ) have high potential for environmental application due to their photocatalytic properties. However, to optimize such properties, particle size, structure, phase and surface area are parameters that need attention. The use of different synthesis methods makes possible to control these characteristics. In this work, TiO 2 powders were obtained by the microwave assisted solder gel and sol-gel methods to evaluate the crystallinities, phases and morphologies obtained. The diffractograms indicate that the anatase phase was obtained for both methodologies, with the crystallinity being lower for the solvothermic methodology and for the sol-gel methodology when the calcination was not performed. Furthermore, in the sol-gel methodology, for higher calcination temperatures, less formation of aggregates occurs, in addition it was possible to observe the formation of TiO 2 rings, although with irregular presence.