Morphological, electrochemical and photoelectrochemical characterization of nanotubular TiO 2 synthetized electrochemically from different electrolytes

Diego P. Oyarzún, Ricardo Córdova, Omar E. Linarez Pérez, Eduardo Muñoz, Rodrigo Henríquez, Manuel López Teijelo, Humberto Gómez

Resultado de la investigación: Article

18 Citas (Scopus)

Resumen

The electrochemical synthesis of auto-organized TiO 2 arrays generated by Ti anodization in different non-aqueous electrolytes was analyzed. Propylene carbonate-based electrolytes seem to be good electrolytic media for the controlled growth of titania nanotube structures. Scanning electron microscopy (SEM) analysis indicated that, depending on the media employed in the synthesis of the TiO 2 nanotubes, different aspect ratios (length/diameter) could be obtained. Impedance analysis using the passive pit model gave the electrical properties of the layers during the different stages of nanotubes formation. Mott-Schottky analysis and the impedance results showed that the TiO 2 nanotubes layers were n-type semiconductors with highly defective walls on top of a resistive barrier layer. Photoelectrochemical measurements showed that tetra(4-carboxyphenyl)porphyrin (TCPP) adsorbed onto the TiO 2 nanotube arrays, which could be employed as an efficient photosensitizer for solar-energy conversion by TCPP-sensitized nanotubular TiO 2 electrodes.

Idioma originalEnglish
Páginas (desde-hasta)2265-2275
Número de páginas11
PublicaciónJournal of Solid State Electrochemistry
Volumen15
N.º10
DOI
EstadoPublished - 1 oct 2011

Huella dactilar

Nanotubes
Electrolytes
nanotubes
electrolytes
Porphyrins
porphyrins
impedance
nonaqueous electrolytes
solar energy conversion
electrochemical synthesis
n-type semiconductors
Photosensitizing Agents
Photosensitizers
barrier layers
propylene
Energy conversion
Solar energy
Propylene
aspect ratio
Aspect ratio

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Electrochemistry
  • Electrical and Electronic Engineering

Citar esto

Oyarzún, Diego P. ; Córdova, Ricardo ; Linarez Pérez, Omar E. ; Muñoz, Eduardo ; Henríquez, Rodrigo ; López Teijelo, Manuel ; Gómez, Humberto. / Morphological, electrochemical and photoelectrochemical characterization of nanotubular TiO 2 synthetized electrochemically from different electrolytes. En: Journal of Solid State Electrochemistry. 2011 ; Vol. 15, N.º 10. pp. 2265-2275.
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abstract = "The electrochemical synthesis of auto-organized TiO 2 arrays generated by Ti anodization in different non-aqueous electrolytes was analyzed. Propylene carbonate-based electrolytes seem to be good electrolytic media for the controlled growth of titania nanotube structures. Scanning electron microscopy (SEM) analysis indicated that, depending on the media employed in the synthesis of the TiO 2 nanotubes, different aspect ratios (length/diameter) could be obtained. Impedance analysis using the passive pit model gave the electrical properties of the layers during the different stages of nanotubes formation. Mott-Schottky analysis and the impedance results showed that the TiO 2 nanotubes layers were n-type semiconductors with highly defective walls on top of a resistive barrier layer. Photoelectrochemical measurements showed that tetra(4-carboxyphenyl)porphyrin (TCPP) adsorbed onto the TiO 2 nanotube arrays, which could be employed as an efficient photosensitizer for solar-energy conversion by TCPP-sensitized nanotubular TiO 2 electrodes.",
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Morphological, electrochemical and photoelectrochemical characterization of nanotubular TiO 2 synthetized electrochemically from different electrolytes. / Oyarzún, Diego P.; Córdova, Ricardo; Linarez Pérez, Omar E.; Muñoz, Eduardo; Henríquez, Rodrigo; López Teijelo, Manuel; Gómez, Humberto.

En: Journal of Solid State Electrochemistry, Vol. 15, N.º 10, 01.10.2011, p. 2265-2275.

Resultado de la investigación: Article

TY - JOUR

T1 - Morphological, electrochemical and photoelectrochemical characterization of nanotubular TiO 2 synthetized electrochemically from different electrolytes

AU - Oyarzún, Diego P.

AU - Córdova, Ricardo

AU - Linarez Pérez, Omar E.

AU - Muñoz, Eduardo

AU - Henríquez, Rodrigo

AU - López Teijelo, Manuel

AU - Gómez, Humberto

PY - 2011/10/1

Y1 - 2011/10/1

N2 - The electrochemical synthesis of auto-organized TiO 2 arrays generated by Ti anodization in different non-aqueous electrolytes was analyzed. Propylene carbonate-based electrolytes seem to be good electrolytic media for the controlled growth of titania nanotube structures. Scanning electron microscopy (SEM) analysis indicated that, depending on the media employed in the synthesis of the TiO 2 nanotubes, different aspect ratios (length/diameter) could be obtained. Impedance analysis using the passive pit model gave the electrical properties of the layers during the different stages of nanotubes formation. Mott-Schottky analysis and the impedance results showed that the TiO 2 nanotubes layers were n-type semiconductors with highly defective walls on top of a resistive barrier layer. Photoelectrochemical measurements showed that tetra(4-carboxyphenyl)porphyrin (TCPP) adsorbed onto the TiO 2 nanotube arrays, which could be employed as an efficient photosensitizer for solar-energy conversion by TCPP-sensitized nanotubular TiO 2 electrodes.

AB - The electrochemical synthesis of auto-organized TiO 2 arrays generated by Ti anodization in different non-aqueous electrolytes was analyzed. Propylene carbonate-based electrolytes seem to be good electrolytic media for the controlled growth of titania nanotube structures. Scanning electron microscopy (SEM) analysis indicated that, depending on the media employed in the synthesis of the TiO 2 nanotubes, different aspect ratios (length/diameter) could be obtained. Impedance analysis using the passive pit model gave the electrical properties of the layers during the different stages of nanotubes formation. Mott-Schottky analysis and the impedance results showed that the TiO 2 nanotubes layers were n-type semiconductors with highly defective walls on top of a resistive barrier layer. Photoelectrochemical measurements showed that tetra(4-carboxyphenyl)porphyrin (TCPP) adsorbed onto the TiO 2 nanotube arrays, which could be employed as an efficient photosensitizer for solar-energy conversion by TCPP-sensitized nanotubular TiO 2 electrodes.

KW - Dye sensitizers

KW - Impedance spectroscopy;

KW - Semiconductors

KW - Titania nanotubes

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