Desenvolvimento e caracterização de superfícies nanorecobertas à base de TiO2 e Ni

Abstract

Currently the nanocomposites have been the main focus of several areas of research. Mainly due to new and unusual physical and chemical properties, absent in the same material in macro and microscopic size, are observed in this new scale. This work is aimed to obtain nanocomposites based on TiO2 and Ni, which were synthesized and characterized. The procedure for preparation of nanocomposites based on "Halloysite Nanoclay" nanocoating with TiO2 and Ni, using the polymeric precursor method is presented. Through this synthesis, were obtained for particle size ranging between 7 and 35 nm. The products were characterized by size, physisorption of N2 at 77 K (BET), energy dispersive X-ray (EDX), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) . The results indicated that the method was efficient and appropriate for ceramic nanocomposites based on functionalized TiO2/Ni on the surface of the clay. This functionalization may be strongly influenced depending on the concentration of metal salt in the precursor polymer, and the temperature of calcination, observing the formation of a solid solution preferably in the presence of rutile phase of TiO2.