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Di Iorio, Y.; Rodríguez, H.B.; San Román, E.; Grela, M.A. "Photoelectrochemical behavior of alizarin modified TiO2 films" (2010) Journal of Physical Chemistry C. 114(26):11515-11521
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Abstract:

Photocurrent voltage curves obtained under visible light excitation of alizarin molecules chemisorbed to nanoporous TiO2 films show both anodic and cathodic currents. The potential at which the sign reversal occurs depends on the electrolyte pH, the presence of acceptors, and the dye coverage, but as a general rule, it occurs at potentials ca. 600-700 mV more positive than the flat band potential. Negative photocurrents are accounted by efficient electron discharge to the electrolyte mediated by the ligand. Cathodic photocurrents are only observed at pH values higher than ca. 4.0 and go through a maximum at intermediate alizarin loadings. This phenomenon is ascribed to the progressive reparation of surface states by alizarin which hampers carrier transport through the TiO2 matrix and decreases electron discharge to the electrolyte solution. © 2010 American Chemical Society.

Registro:

Documento: Artículo
Título:Photoelectrochemical behavior of alizarin modified TiO2 films
Autor:Di Iorio, Y.; Rodríguez, H.B.; San Román, E.; Grela, M.A.
Filiación:Departamento de Química, Universidad Nacional de Mar Del Plata, Funes 3350, B7602AYL Mar del Plata, Argentina
INQUIMAE, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón 2, 1428 Buenos Aires, Argentina
Palabras clave:Cathodic currents; Cathodic photocurrent; Electrolyte solutions; Electron discharge; Flat band potential; matrix; Nanoporous TiO; pH value; Photocurrent-voltage curve; Photoelectrochemical behavior; Sign reversal; Surface state; TiO; Visible light excitation; Chemisorption; Photocurrents; Semiconductor quantum wells; Electrolytes
Año:2010
Volumen:114
Número:26
Página de inicio:11515
Página de fin:11521
DOI: http://dx.doi.org/10.1021/jp102354m
Título revista:Journal of Physical Chemistry C
Título revista abreviado:J. Phys. Chem. C
ISSN:19327447
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19327447_v114_n26_p11515_DiIorio

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Citas:

---------- APA ----------
Di Iorio, Y., Rodríguez, H.B., San Román, E. & Grela, M.A. (2010) . Photoelectrochemical behavior of alizarin modified TiO2 films. Journal of Physical Chemistry C, 114(26), 11515-11521.
http://dx.doi.org/10.1021/jp102354m
---------- CHICAGO ----------
Di Iorio, Y., Rodríguez, H.B., San Román, E., Grela, M.A. "Photoelectrochemical behavior of alizarin modified TiO2 films" . Journal of Physical Chemistry C 114, no. 26 (2010) : 11515-11521.
http://dx.doi.org/10.1021/jp102354m
---------- MLA ----------
Di Iorio, Y., Rodríguez, H.B., San Román, E., Grela, M.A. "Photoelectrochemical behavior of alizarin modified TiO2 films" . Journal of Physical Chemistry C, vol. 114, no. 26, 2010, pp. 11515-11521.
http://dx.doi.org/10.1021/jp102354m
---------- VANCOUVER ----------
Di Iorio, Y., Rodríguez, H.B., San Román, E., Grela, M.A. Photoelectrochemical behavior of alizarin modified TiO2 films. J. Phys. Chem. C. 2010;114(26):11515-11521.
http://dx.doi.org/10.1021/jp102354m