Luminescência e absorção óptica de nanofibras dos óxidos de titânio e tungstênio na região do uv-visível

doi.org/10.29327/217514.7.1-2

Abstract

The synthesis of fibers by electrospinning allows us to obtain one-dimensional nanostructures with good flexibility, optical, catalytic properties, high surface area and porosity. They can be used in applications such as: catalysis, solar cells, fuel cells, membranes, hydrogen batteries, among others. Therefore, in this work we synthesized TiO₂ and TiO₂/WO₃ nanofibers by electrospinning. These nanofibers were heat treated between 650 ºC and 800 ºC, and characterized as: the morphology by scanning electron microscopy (SEM), crystalline phases by X-ray diffraction (XRD), photoactivity through tests of degradation of 125 mL of a solution 20 ppm of orange methyl dye and by colorimetry. The partial results indicate the TiO₂/WO₃ sample heat treated at 800 ºC more effective in the degradation of the dye and in the reflection of the different colors, possibly due to the existence of a synchronicity between the chemical and physical properties of the titanium and tungsten oxides.