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

doi:10.1007/s10008-010-1236-0

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

INSTITUTE OF CHEMISTRY

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23 Scopus citations

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.

Original language	English
Pages (from-to)	2265-2275
Number of pages	11
Journal	Journal of Solid State Electrochemistry
Volume	15
Issue number	10
DOIs	https://doi.org/10.1007/s10008-010-1236-0
State	Published - Oct 2011

Keywords

Dye sensitizers
Impedance spectroscopy;
Semiconductors
Titania nanotubes

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10.1007/s10008-010-1236-0

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Oyarzún, D. P., Córdova, R., Linarez Pérez, O. E., Muñoz, E., Henríquez, R., López Teijelo, M., & Gómez, H. (2011). Morphological, electrochemical and photoelectrochemical characterization of nanotubular TiO ₂ synthetized electrochemically from different electrolytes. Journal of Solid State Electrochemistry, 15(10), 2265-2275. https://doi.org/10.1007/s10008-010-1236-0

@article{0171418179774571abfb0809718d2c2e,

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

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.",

keywords = "Dye sensitizers, Impedance spectroscopy;, Semiconductors, Titania nanotubes",

author = "Oyarz{\'u}n, {Diego P.} and Ricardo C{\'o}rdova and {Linarez P{\'e}rez}, {Omar E.} and Eduardo Mu{\~n}oz and Rodrigo Henr{\'i}quez and {L{\'o}pez Teijelo}, Manuel and Humberto G{\'o}mez",

note = "Funding Information: We thank the Direcci{\'o}n de Investigaci{\'o}n e Innovaci{\'o}n of the Pontificia Universidad Cat{\'o}lica de Valpara{\'i}so (grant No. 037.108/2009 DII-PUCV) for financial support for this study. E. Mu{\~n}oz and R. Henr{\'i}quez thank Programa Bicentenario de Ciencia y Tecnolog{\'i}a, PSD82. D. Oyarz{\'u}n is grateful to the CONICYT for his thesis scholarship. M. L{\'o}pez and O. Linarez thank the Consejo Nacional de Investigaciones Cient{\'i}ficas y T{\'e}cnicas of Argentina (CONICET), the Agencia Nacional de Promoci{\'o}n Cient{\'i}fica y Tecnol{\'o}gica (ANPCYT), and the Secretar{\'i}a de Ciencia y Tecnolog{\'i}a (SECYT-UNC) for financial support. O. Linarez also thanks the CONICET for the fellowship grant.",

year = "2011",

month = oct,

doi = "10.1007/s10008-010-1236-0",

language = "English",

volume = "15",

pages = "2265--2275",

journal = "Journal of Solid State Electrochemistry",

issn = "1432-8488",

publisher = "Springer Verlag",

number = "10",

}

Oyarzún, DP, Córdova, R, Linarez Pérez, OE, Muñoz, E , Henríquez, R, López Teijelo, M & Gómez, H 2011, 'Morphological, electrochemical and photoelectrochemical characterization of nanotubular TiO ₂ synthetized electrochemically from different electrolytes', Journal of Solid State Electrochemistry, vol. 15, no. 10, pp. 2265-2275. https://doi.org/10.1007/s10008-010-1236-0

Morphological, electrochemical and photoelectrochemical characterization of nanotubular TiO ₂ synthetized electrochemically from different electrolytes. / Oyarzún, Diego P.; Córdova, Ricardo; Linarez Pérez, Omar E. et al.
In: Journal of Solid State Electrochemistry, Vol. 15, No. 10, 10.2011, p. 2265-2275.

Research output: Contribution to journal › Article › peer-review

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

N1 - Funding Information: We thank the Dirección de Investigación e Innovación of the Pontificia Universidad Católica de Valparaíso (grant No. 037.108/2009 DII-PUCV) for financial support for this study. E. Muñoz and R. Henríquez thank Programa Bicentenario de Ciencia y Tecnología, PSD82. D. Oyarzún is grateful to the CONICYT for his thesis scholarship. M. López and O. Linarez thank the Consejo Nacional de Investigaciones Científicas y Técnicas of Argentina (CONICET), the Agencia Nacional de Promoción Científica y Tecnológica (ANPCYT), and the Secretaría de Ciencia y Tecnología (SECYT-UNC) for financial support. O. Linarez also thanks the CONICET for the fellowship grant.

PY - 2011/10

Y1 - 2011/10

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

UR - http://www.scopus.com/inward/record.url?scp=80054731668&partnerID=8YFLogxK

U2 - 10.1007/s10008-010-1236-0

DO - 10.1007/s10008-010-1236-0

M3 - Article

AN - SCOPUS:80054731668

SN - 1432-8488

VL - 15

SP - 2265

EP - 2275

JO - Journal of Solid State Electrochemistry

JF - Journal of Solid State Electrochemistry

IS - 10

ER -

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

Abstract

Keywords

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