Photocatalytic Decomposition of Rhodamine-B Using Scandium and Silver-Modified TiO₂ Powders

Abstract:

Semiconductor-mediated photocatalytic oxidation is an interesting method for water decontamination and a specially modified TiO₂ is said to be a promising material. This study verified that the synthesis of 1wt%Ag modified-Sc_0.01Ti_0.99O_1.995 powder samples prepared by Polymeric Precursor Method is capable of forming a mixture of anatase-rutile phase with high photocatalytic performance. This kind of material is found to have a lower bandgap compared to the TiO₂-anatase commercial powders, which can be associated to an innovative hybrid modification. The simultaneous insertion of scandium in order to generate a p-type semiconductor and a metallic silver nanophase acting as an electron trapper demonstrated being capable of enhancing the degradation of rhodamine B compared to the commercial TiO₂. In spite of the different thermal treatments or phase amounts, the hybrid modified powder samples showed higher photocatalytic activity than the commercial ones.

• Periodical: Advanced Materials Research (Volume 975)
• Pages: 213-218
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.975.213
• Online since: July 2014
• Authors: Douglas Washington da Silva*, Daniela Cristina Manfroi, Guilhermina Ferreira Teixeira, Leining Antônio Perazolli, Maria Aparecida Zaghete, Alberto Adriano Cavalheiro
• Keywords: Photocatalyst, Polymeric Precursor, Scandium, Silver, Titanium Dioxide

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