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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Decorating Titanate Nanotubes with CeO2 Nanoparticles

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Author(s):
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]
Total Authors: 7
Affiliation:
[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
Total Affiliations: 4
Document type: Journal article
Source: Journal of Physical Chemistry C; v. 113, n. 47, p. 20234-20239, NOV 26 2009.
Web of Science Citations: 44
Abstract

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)