19 research outputs found
Effect of Sn4+ doping on the dielectric and nonlinear J–E properties of CaCu3Ti4.1O12 ceramics with a slight titanium excess for X9R capacitors
Preparation and characterization of hollow TiO2 nanospheres: The effect of Fe3+ doping on their microstructure and electronic structure
Excellent-Δε′, very low-tanδ, giant-ε′ and nonlinear J–E properties of Zn2+-doped [email protected] ceramics
Magnetic and Optical Properties of CoFe2O4 Nanoparticles Synthesized by Reverse Micelle Microemulsion Method
Effect of Fe3+ Doping in the Photocatalytic Properties of BaSnO3 Perovskite
<div><p>In the last ten years, stannates with perovskite structure have been tested as photocatalysts. In spite of the ability of perovskite materials to accommodate different cations in its structure, evaluation of doped stannates is not a common task in the photocatalysis area. In this work, Fe3+ doped BaSnO3 was synthesized by the modified Pechini method, with calcination between 300 and 800ÂşC/4 h. The powder precursor was characterized by thermogravimetry after partial elimination of carbon. Characterization after the second calcination step was done by X-ray diffraction, Raman spectroscopy and UV-visible spectroscopy. Materials were tested in the photocatalytic discoloration of the Remazol Golden Yellow azo dye under UVC irradiation. Higher photocatalytic efficiency was observed under acid media. As no meaningful adsorption was observed at this condition we believe that an indirect mechanism prevails. Fe3+ doping decreased the band gap and favored the photocatalytic reaction, which may be assigned to the formation of intermediate levels inside the band gap.</p></div