Recubrimientos de Al2O3/TiO2 depositados en sustratos de acero inoxidable y galvanizado para aplicaciones fotocatalíticas.
Abstract
The design of a photocatalyst with physicochemical properties such as to ensure high catalysis is more valuable if it can be used repeatedly without appreciable loss of its efficiency when deposited on metallic substrates that give it high mechanical strength for a higher number of operating cycles. In this work, soles of Al2O3/TiO2 in an Al/Ti ratio of 1.5 were deposited on 304 stainless steel and galvanized steel substrates by the dip-coating method. By infrared spectroscopy were identified the Al-O bond bands in 500-750 cm-1 and Ti-O bond bands in 493-639 cm-1 in the coatings by UV-Vis spectroscopy coating absorb a low intensity of visible radiation (420 to 650 nm) compared to the absorption maximum in the UV spectrum (220-230 nm). The coatings deposited on galvanized steel showed poor adhesion, heterogeneity, and presence of fractures compared to the homogeneity and absence of fractures of the coating on stainless steel.
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