Evidence on dye clustering in the sensitization of TiO<inf>2</inf> by aluminum phthalocyanine
As previous studies have shown, the photocatalytic reduction of Cr(vi) to Cr(iii) in the presence of 4-chlorophenol can be carried out efficiently under visible irradiation using TiO<inf>2</inf> modified with hydroxoaluminum- tricarboxymonoamide phthalocyanine (AlTCPc) in spite of the hi...
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Royal Society of Chemistry
2013
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| LEADER | 13106caa a22008777a 4500 | ||
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| 001 | PAPER-11175 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518204117.0 | ||
| 008 | 190411s2013 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-84886923007 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 030 | |a PPSHC | ||
| 100 | 1 | |a Rodríguez, H.B. | |
| 245 | 1 | 0 | |a Evidence on dye clustering in the sensitization of TiO<inf>2</inf> by aluminum phthalocyanine |
| 260 | |b Royal Society of Chemistry |c 2013 | ||
| 270 | 1 | 0 | |m San Román, E.; INQUIMAE (UBA-CONICET), Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón 2, 1428 Ciudad de Buenos Aires, Argentina; email: esr@qi.fcen.uba.ar |
| 506 | |2 openaire |e Política editorial | ||
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| 504 | |a Di Iorio, Y., San Román, E., Litter, M.I., Grela, M.A., Photoinduced Reactivity of Strongly Coupled TiO<inf>2</inf> Ligands under Visible Irradiation: An Examination of an Alizarin Red@TiO<inf>2</inf> Nanoparticulate System (2008) J. Phys. Chem. C, 112, pp. 16532-16538 | ||
| 520 | 3 | |a As previous studies have shown, the photocatalytic reduction of Cr(vi) to Cr(iii) in the presence of 4-chlorophenol can be carried out efficiently under visible irradiation using TiO<inf>2</inf> modified with hydroxoaluminum- tricarboxymonoamide phthalocyanine (AlTCPc) in spite of the high aggregation tendency of the dye. In the present work, photocurrent and absorption spectra of AlTCPc modified TiO<inf>2</inf> films are studied together with absorption and fluorescence of the dye in solution as a function of the concentration of the dye to clarify (a) the role of aggregates and the nature of the species responsible for electron injection into the semiconductor and (b) the reasons why, as reported earlier, the photocatalytic activity is nearly independent of dye loading at constant TiO<inf>2</inf> mass. Results are consistent with the presence of AlTCPc clusters with similar properties both on the TiO<inf>2</inf> surface and in H<inf>2</inf>O-DMSO solution. The actual photoactive species is the monomeric dye electronically coupled to the semiconductor. Monomer concentration depends only slightly on AlTCPc analytical concentration, in a way similar to surfactant monomers in micellar equilibrium, thus explaining the independence of photocatalytic activity on dye concentration. © The Royal Society of Chemistry and Owner Societies. |l eng | |
| 593 | |a INQUIMAE (UBA-CONICET), Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón 2, 1428 Ciudad de Buenos Aires, Argentina | ||
| 593 | |a Departamento de Química, Universidad Nacional de Mar Del Plata, Funes 3350, 7600 Mar del Plata Prov. de Buenos Aires, Argentina | ||
| 593 | |a Gerencia Química, Comisión Nacional de Energía Atómica, Av. Gral. Paz 1499 1650, San Martín Prov. de Buenos Aires, Argentina | ||
| 593 | |a Instituto de Investigación e Ingeniería Ambiental, Universidad de Gral. San Martín, Peatonal Belgrano 3563 1er. piso, 1650 San Martín Prov. de Buenos Aires, Argentina | ||
| 593 | |a INIFTA, Facultad de Ciencias Exactas, Universidad Nacional de la Plata, Diag. 113 y Calle 64, 1900 La Plata, Prov. de Buenos Aires, Argentina | ||
| 593 | |a INTEMA-CONICET, Facultad de Ingenieria, Universidad Nacional de Mar Del Plata, Juan B. Justo 4302, 7600 Mar del Plata, Prov. de Buenos Aires, Argentina | ||
| 700 | 1 | |a Di Iorio, Y. | |
| 700 | 1 | |a Meichtry, J.M. | |
| 700 | 1 | |a Grela, M.A. | |
| 700 | 1 | |a Litter, M.I. | |
| 700 | 1 | |a San Román, E. | |
| 773 | 0 | |d Royal Society of Chemistry, 2013 |g v. 12 |h pp. 1984-1990 |k n. 11 |p Photochem. Photobiol. Sci. |x 1474905X |t Photochemical and Photobiological Sciences | |
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