Se and Te-modified titania for photocatalytic applications

0359188 - ÚACH 2012 RIV US eng J - Journal Article
Štengl, Václav - Bakardjieva, Snejana - Bludská, Jana
Se and Te-modified titania for photocatalytic applications.
Journal of Materials Science. Roč. 46, č. 10 (2011), s. 3523-3536. ISSN 0022-2461. E-ISSN 1573-4803
R&D Projects: GA ČR GA203/08/0334
Institutional research plan: CEZ:AV0Z40320502
Keywords : visible-light * aqueous-solution * mathylene-blue * orange -II
Subject RIV: CA - Inorganic Chemistry
Impact factor: 2.015, year: 2011

Nanosized Se4+ and Te4+, respectively, doped titania was prepared by homogeneous hydrolysis of titanium oxo-sulfate with urea in aqueous solutions in the presence of amorphous selenium and tellurium. The prepared samples were annealing at temperature 200 and 400 A degrees C. The structure of prepared samples was characterized by X-ray powder diffraction (XRD), selected area electron diffraction (SAED), surface area (BET), and porosity determination (BJH). The morphology and microstructure characteristics were obtained by scanning electron microscopy (SEM) and high-resolution electron microscopy (HRTEM). The method of UV/Vis diffuse reflectance spectroscopy was employed to estimate band-gap energies of the Se and Te-doped titania. The photocatalytic activity of the prepared samples was assessed by the photocatalytic decomposition of Orange II dye in an aqueous slurry during irradiation at 365 and 400 nm wavelength.
Permanent Link: http://hdl.handle.net/11104/0197024