Nanocompósito de fibra de carbono e TiO2 obtido via hidrotermal assistida por micro-ondas.

Abstract

This study aimed the preparation of ultra fine nanoparticles of titanium dioxide (TiO2) via hydrothermal synthesis assisted by microwave radiation (MHS), to be subsequently anchored in carbon fiber substrate (CF) as well as conventional nanoparticles which were impregnated using the same type of substrate. Nanocomposites synthesized from the MHS show a homogeneous layer formed by the ultrafine TiO2 nanoparticles on CF compared to the nanoparticles impregnated by conventional method, layer formed due to the energy involved during synthesis. The photocatalytic performance in the visible region and the dark adsorption assessment of both nanocomposites, conventional (CF+P25) and via MHS (CF/TiO2-MHS) using Rhodamine B (RhB) as a contaminant model. This study showed a reproducible and promising method for a nanocomposite production consisting of TiO2 nanoparticles anchored in a carbon fiber substrate, both of them using MHS because it allows the thickness control of the TiO2 layer on the substrate, besides the rapid and clean synthesis of single nanoparticles. These results make possible advanced applications based on the electrochemical nanostructure and the development of flexible materials.