Síntese rápida para obtenção de óxido de estanho utilizando agitação mecânica associada a sonoquímica

Abstract

The main goal of this work is to develop a methodology to produce tin oxide, focusing in reduce the time and cost of processing. According the literature, the physics-chemistry properties are related to the methodology applied to produce the tin oxide. Adding, it is not easy to obtain homogeneous morphology and size when nanoparticles are the object of study. So, this work proposes a simple method to obtain nanoparticles of tin oxide that presented a low cost of synthesis and used common equipment, that are often present at any lab. Tin oxide synthesis methods developed in this work was the chemistry precipitation reaction, accelerated with the association of mechanical stirring and the sonochemistry. The tin oxide structures were confirmed through X ray diffraction. The morphology of the powder obtained were visualized by field emission gun scan electron microscopy, visualizing the nanoparticles of tin oxide around 5 to 20 nm, with homogeneous size distribution and shape. Thermal analysis revealed about 10 % of mass loss associate with water presence. Using the Kubelka-Munk method, the band gap of the tin oxide was calculated to about 4,0 eV, that is a reported value for the SnO2. These results showed the possibility to obtained nanoparticles of tin oxide throughout a simple and cheap method.