Abstract

QUISPE, Luz; LOPEZ, Luis; TEIXEIRA, Víctor  and  CABRERA, Saúl. NUEVOS OXIDOS DE TITANIO DOPADOS (Yb, Nd, La y Li) PARA LA REDUCCION FOTOCATALITICA DE CROMO HEXAVALENTE. Rev. Bol. Quim [online]. 2010, vol.27, n.1, pp.49-56. ISSN 0250-5460.

ABSTRACT TiO₂-pure and TiO₂-doped with Yb, Nd, La and Li were synthesized by the atrane route, all oxides were found with porosity in the range of mesoporous. Several techniques of characterization have been applied: X-ray diffraction (XRD), adsorption-desorption (BET), diffuse reflectance spectroscopy (DRS) and transmission electronic microscopy (TEM). The materials were tested as photocatalysts for the reduction of Cr(VI) in presence of a electron donor, ethylenediaminetetraacetic acid (EDTA). Incorporation of Nd and Yb on TiO₂ shift the energy of the band gap toward visible region, these oxides showed anatase phase crystalline and suitable adsorption properties for Cr(VI) and EDTA, resulting in higher photoactivities compared to pure titania and La and Li-dopants. Corresponding author: *saulcabreram@correo.umsa.bo

Keywords : TiO₂-doped; Lanthanides; Atrane Route; Hexavalent Chromium; Photocatalysis.

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