title: Combination of sunlight, oxidants, and Ce-doped TiO2for phenol degradation.
abstract: The degradation of phenol was used as a model reaction to investigate the photocatalytic properties of cerium-doped (0.1 nominal atomic percent) TiO2catalysts in the presence and in the absence of oxidants: persulfate (PS) or hydrogen peroxide (HP). Experiments were performed in batch reactors using either artificial light (ultraviolet or visible) or solar exposure during spring-summer seasons in La Plata City (34.90° S, 57.92° W, 15 MASL). The formation of hydroquinone, catechol, and p-benzoquinone was observed in all the experiments. Additionally, for the experiments with PS (with or without catalyst), evidence of the formation of dimers and trimers was found. Total degradation of phenol (250 μM) was achieved with doped material and 7 mM of PS (two doses) after 3 h of solar exposure (HSUV, T= 2.9 ± 0.6 105J m-2).
authors.affiliation: Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CONICET, Universidad Nacional de La Plata (UNLP), 1900, La Plata, Argentina.
authors.forename: Marcela V
authors.initials: MV
authors.lastname: Martin
authors.affiliation: Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CONICET, Universidad Nacional de La Plata (UNLP), 1900, La Plata, Argentina.
authors.forename: Adriana
authors.initials: A
authors.lastname: Ipiña
authors.affiliation: Centro de Investigación y Desarrollo en Ciencias Aplicadas (CINDECA), CONICET, Universidad Nacional de La Plata (UNLP), 1900, La Plata, Argentina.
authors.forename: Paula I
authors.initials: PI
authors.lastname: Villabrille
authors.affiliation: Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CONICET, Universidad Nacional de La Plata (UNLP), 1900, La Plata, Argentina. janina@inifta.unlp.edu.ar.
authors.forename: Janina A
authors.initials: JA
authors.lastname: Rosso
mesh_terms: D002563:Cerium; D008956:Models, Chemical; D016877:Oxidants / Q000737:chemistry*; D010636:Phenols / Q000032:analysis / Q000737:chemistry; D010782:Photolysis; D013472:Sunlight; D014025:Titanium / Q000737:chemistry*
chemical_list: D016877:Oxidants; D010636:Phenols; C009495:titanium dioxide; D002563:Cerium; D014025:Titanium
keywords: Doped titanium dioxide; Persulfate; Phenol; Photocatalysis; Solar exposure