Investigation of photocatalytic activity of metal-doped TiO2 nanoparticles prepared by Pechini method

Autor(es)

Rosario, Adriane V. ^[1] ; Christinelli, Wania A. ^[1] ; Barreto, Roberta N. ^[1] ; Pereira, Ernesto C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Ctr Multidisciplinar Desenvolvimento Mat Ceram, Dept Quim, Lab Interdisciplinar Eletroquim & Ceram, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Sol-Gel Science and Technology; v. 64, n. 3, p. 734-742, DEC 2012.
• Citações Web of Science: 9

Resumo

M-doped TiO2 (M = Ag2+, Al3+, Ce4+, Nb5+) with different dopant contents have been prepared by the Pechini method using titanium IV isopropoxide as precursor. The effect of doping concentration on the photocatalytic activity for methyl orange (MO) photodegradation was investigated using UV radiation. The photocatalysts were characterized by surface area, X-ray diffraction and UV-Vis diffuse reflectance spectroscopy. An increase in the photoactivity of TiO2 nanoparticles was confirmed by MO photocatalytic degradation experiments, when the transition metal ions were incorporated into the semiconductor crystalline lattice, which could be attributed to an increase in the charge separation and reduction of e(-)/h(+) recombination as a function of the substitutional defect generated at very low levels. (AU)

• Processo FAPESP: 07/03880-0 - Síntese e caracterização de materiais à base de óxido de titânio nanoestruturado para uso em fotocatálise
• Beneficiário: Adriane Viana do Rosário
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado