A simple method for the synthesis of SnO2 nanoparticle with reduced band gap
DOI:
https://doi.org/10.20873/jbb.uft.cemaf.v13n3.20318Keywords:
synthesis, characterization, SnO2, nanomaterials, reduced band gapAbstract
The present research aimed to synthesize the tin dioxide (SnO2) semiconductor by coprecipitation at room temperature, a chemical synthesis method widely used to obtain nanomaterials. After the synthesis, the SnO2 was structurally characterized by X-ray diffraction, Rietveld refinement, micro-Raman spectroscopy and Fourier transform infrared spectroscopy. These structural techniques revealed the formation of a highly disordered tetragonal rutile structure, without the presence of secondary phases and impurities. The band gap energy was calculated from UV-vis diffuse reflectance spectroscopy, showing a reduced value (3.17 eV) when compared to the literature. Furthermore, the shape and size of the nanoparticles were investigated by field emission scanning electron microscopy and transmission electron microscopy, obtaining irregular spherical nanoparticles with an average size of approximately 25 nm, together with microrod-like structures. Therefore, it was possible to develop a simple and effective synthetic route to control the band gap of SnO2 nanoparticles.
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