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Special Topics & Reviews in Porous Media: An International Journal
ESCI SJR: 0.277 SNIP: 0.52 CiteScore™: 1.3

ISSN Imprimir: 2151-4798
ISSN On-line: 2151-562X

Special Topics & Reviews in Porous Media: An International Journal

DOI: 10.1615/SpecialTopicsRevPorousMedia.v2.i2.10
pages 73-81

ANALYSIS OF THE BEHAVIOR OF MESOPOROUS ANATASE NANOCRYSTALLINE TITANIUM DIOXIDE FILMS APPLIED TO DYE-SENSITIZED SOLAR CELLS

D. A. Barros Filho
Laboratory for Testing Biomaterials in Dentistry, 02071-013, Sao Paulo
H. R. Lewgoy
Laboratory for Testing Biomaterials in Dentistry, 02071-013, Sao Paulo
R. Amore
Laboratory for Testing Biomaterials in Dentistry, 02071-013, Sao Paulo
A. Anido-Anido
Laboratory for Testing Biomaterials in Dentistry, 02071-013, Sao Paulo
C. Anauate-Netto
Laboratory for Testing Biomaterials in Dentistry, 02071-013, Sao Paulo
V. Seriacopi
Engineering Department, UNIBAN, 09636-000, Sao Paulo
C. O. Avellaneda
Institute of Chemistry -UNICAMP, 13084-862, Campinas, Sao Paulo, Brazil & CDTec, Universidade Federal de Pelotas

RESUMO

Mesoporous titanium dioxide films were synthesized using a ternary system consisting of butanol, HCl, and pluronic P123. The films sensitized by dithiocyanate-N,N'-bis(4-carboxylate4-tetrabutyl-ammoniumcarboxylate-2,2'-bipyridine)ruthenium(II) showed a high global efficiency for current generation (∼2.8%) under AM1.5 conditions. The films were characterized by x-ray diffraction, N2 adsorption, and transmission electron microscopy, which confirmed the presence of disordered mesopores with different sizes wrapped in a titania anatase phase. The films also showed a capacitive behavior when they were electrochemically characterized using poly(ethylene oxide-co-2-(2-methoxyethoxy)ethyl glycidyl ether) P(EO-EM) as a polymeric electrolyte. This feature is mainly associated with its random mesoporous structure within the anatase titanium oxide film, which traps electrons along the film, decreasing the reduction of I2 to I and releasing charge for redox reactions under dark conditions.


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