Decorating Titanate Nanotubes with CeO2 Nanoparticles

Autor(es)

Viana, Bartolomeu C. ^{[1, 2]} ; Ferreira, Odair P. ^[3] ; Souza Filho, Antonio G. ^{[1, 3]} ; Rodrigues, Carolina M. ^[3] ; Moraes, Sandra G. ^[4] ; Mendes Filho, Josue ^[1] ; Alves, Oswaldo L. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Fed Ceara, Dept Fis, BR-60455900 Fortaleza, Ceara - Brazil

^[2] Univ Fed Piaui, Dept Fis, BR-64049550 Teresina, PI - Brazil

^[3] Univ Estadual Campinas, LQES, Inst Quim, BR-13083970 Campinas, SP - Brazil

^[4] UNIMEP, Lab Energia & Meio Ambiente, BR-13450000 Doeste, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Physical Chemistry C; v. 113, n. 47, p. 20234-20239, NOV 26 2009.
• Citações Web of Science: 44

Resumo

In this work, we report the synthesis, characterization, and application of Ce ion-exchanged titanate nanotubes (Ce-TiNTs). The physicochemical properties of these Ce-TiNTs are discussed in comparison with their pure titanate nanotube counterparts. The transmission electron microscope images showed that the Ce-TiNTs have the same morphology as that of pristine nanotubes and their external walls are decorated with cerium oxide nanoparticles. The mechanism of nanoparticle formation is based on the precipitation of Ce ions at the nanotube surface. We observed a red shift of the absorption band edge toward the visible region whose main contribution comes from the Ce ion intercalation. A red shift of vibrational modes associated with metal ion-oxygen interaction was observed and identified as being due to the effect of Ce addition to the lattice as well as the anchoring of CeO(2) nanoparticles to the nanotube wall. We show that this hybrid system is promising for applications in photocatalysis using the blue region of the electromagnetic spectrum. This was demonstrated for photodegradation of Reactive Blue 19 textile dye. (AU)

• Processo FAPESP: 08/58194-7 - Antonio Gomes de Souza Filho | Universidade Federal do Ceará/UFC - Brasil
• Beneficiário: Oswaldo Luiz Alves
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Brasil