Facile synthesis of N-doped TiO2 nanoparticles by a modified polymeric precursor method and its photocatalytic properties

Autor(es)

Soares, Gabriela B. ^[1] ; Bravin, Bruno ^[1] ; Vaz, Carlos M. P. ^[2] ; Ribeiro, Caue ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Chem, BR-13560970 Sao Carlos, SP - Brazil

^[2] Embrapa Instrumentacao, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: APPLIED CATALYSIS B-ENVIRONMENTAL; v. 106, n. 3-4, p. 287-294, AUG 11 2011.
• Citações Web of Science: 45

Resumo

In recent years, significant effort has been focused on the production of visible-light activated photocatalysts such as N-doped TiO(2) for advanced oxidation processes. Thus, this paper describes a facile and simple route to produce N-doped TiO(2) nanoparticles by a modified polymeric precursor method using urea. In addition, the paper describes the characterization and photocatalytic activity evaluation of N-doped TiO(2) nanoparticles. The predominance of the anatase phase and the modification of band-gap energies in N-TiO(2) indicate that the doping process is effective: Raman spectroscopy shows bands related to TiO(x)N(1-x). The presence of N in higher amounts in the doped nanoparticles confirms the doping process which was also confirmed by X-ray photonelectron spectroscopy (XPS). Unmodified TiO(2) nanoparticles indicate higher UV-C photocatalytic activity, and the N-doped TiO(2) nanoparticles show better visible photocatalytic activity, suggesting a useful way to operate those catalysts under visible light and/or sunlight. (C) 2011 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 09/10998-3 - Avaliação de parâmetros cinéticos envolvidos na fotodegradação de pesticidas catalisada por nanopartículas de TiO2: estudos comparativos sobre a contribuição de processos de transferência de carga e oxidação por radicais livres
• Beneficiário: Gabriela Byzynski Soares
• Modalidade de apoio: Bolsas no Brasil - Doutorado