Estudo comparativo da utilização de nanotubos de titânio e pentóxido de nióbio na fotodegradação do índigo de carmina

Abstract

Water pollution and the environment by toxic organic compounds of industrial origin or another anthropogenic source causes serious problems and damage to the health of humans and other living beings. The great diversity of chemical pollutants from different compositions exclude the possibility of employing a universal treatment method, and opens a range for development of special processing methods for the decontamination of water. This study was to conduct a comparative study of the use of niobium pentoxide and titanium nanotubes in photobleaching of synthetic dyes, making use of a low cost reactor. The hydrothermal synthesis of titanium nanotubes was performed. The catalysts were characterized structurally and surface spectroscopy in the infrared and scanning electron microscopy, surface analysis, pore distribution. photobleaching studies were carried out in order to verify the ability of niobium pentoxide and titanium nanotubes to degrade dyes dispersed in water in the presence of radiation sources UV. The catalysts were used in the photodegradation of the dye indigo carmine color removal is performed analyzes of degraded solutions. At the end of the study was verified high degradation of indigo carmine, and it was found that semiconductors have similar profiles in dye degradation, color removal with levels above 85,6and 86,1%.