Photooxidation of organic mixtures on biased TiO 2 films

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Processes that occur in the TiO 2 -photocatalysis of binary aqueous solutions containing model photolytes with different affinity for the TiO 2 surface (methanol and oxalic and salicylic acids) are analyzed from the photoelectrochemical response of TiO 2 films under bias in a time window of 1-100 s....

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Detalles Bibliográficos
Autor principal: Calvo, M.E
Otros Autores: Candal, R.J, Bilmes, S.A
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2001
Acceso en línea:Registro en Scopus
DOI
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Registro en la Biblioteca Digital
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central Dr. Luis F. Leloir (FCEN) de Universidad de Buenos Aires
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024 7 |2 scopus  |a 2-s2.0-0035888033 
024 7 |2 cas  |a methanol, 67-56-1; oxalic acid, 144-62-7; salicylic acid, 63-36-5, 69-72-7; titanium dioxide, 1317-70-0, 1317-80-2, 13463-67-7, 51745-87-0; Coloring Agents; Methanol, 67-56-1; Organic Chemicals; Oxalic Acid, 144-62-7; Salicylic Acid, 69-72-7; Titanium, 7440-32-6; Water Pollutants, Chemical; titanium dioxide, 13463-67-7 
040 |a Scopus  |b spa  |c AR-BaUEN  |d AR-BaUEN 
030 |a ESTHA 
100 1 |a Calvo, M.E. 
245 1 0 |a Photooxidation of organic mixtures on biased TiO 2 films 
260 |c 2001 
270 1 0 |m Bilmes, S.A.; INQUIMAE-DQIAQF, Fac. de Cie. Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab. II, C1428EHA Buenos Aires, Argentina; email: sarabil@q3.fcen.uba.ar 
506 |2 openaire  |e Política editorial 
504 |a Ollis, D.F., Pelizzetti, E., Serpone, N., Photocatalysis fundamentals and applications (1989) Heterogeneous Photocatalysis in the Environment: Application to Water Purification, , Serpone, N., Pelizzetti, E., Eds.; John Wiley Sons Inc.: Chapter 8 
504 |a Hoffman, M.R., Martin, S.T., Choi, W., Bahnemann, D.W., (1995) Chem. Rev., 95, p. 69 
504 |a (1998) J. Adv. Oxidat. Technol., 3, pp. 3-4 
504 |a (1997) Third International Conference on TiO 2 Photocatalytic Purification and Treatment of Water and Air, , Orlando, FL, September 23-26 
504 |a Burnside, S.D., Shklover, V., Barbé, C., Comte, P., Arendse, F., Brooks, K., Grätzel, M., (1998) Chem. Mater., 10, p. 2419 
504 |a Vinodgopal, K., Hotchandani, S., Kamat, P.V., (1993) J. Phys. Chem., 97, p. 9040 
504 |a Kim, D.H., Anderson, M.A., (1994) Environ. Sci. Technol., 28 (3), p. 479 
504 |a Kim, D.H., Anderson, M.A., (1996) J. Photochem. Photobiol. A: Chem., 94, p. 221 
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504 |a Mandelbaum, P.A., Bilmes, S.A., Regazzoni, A.E., Blesa, M.A., (1999) Solar Energy, 65, p. 75 
504 |a Mandelbaum, P.A., Regazzoni, A.E., Blesa, M.A., Bilmes, S.A., (1999) J. Phys. Chem. B, 103, p. 5505 
504 |a Byrne, J.A., Eggins, B.R., (1998) J. Electroanal. Chem., 457, p. 61 
504 |a Bohem, H.P., (1971) Disc. Faraday Soc., 52, p. 264 
504 |a Weisz, A.D., Regazzoni, A.E., Blesa, M.A., Solar State Ionics, , in press 
504 |a Kosanic, M.M., (1998) J. Photochem. Photobiol. A, 119, p. 119 
504 |a Micic, O.I., Zhang, Y., Cromack, K.R., Trifunac, A.D., Thurnaver, M.C., (1993) J. Phys. Chem., 97, p. 13284 
504 |a Chen, J., Ollis, D.F., Rulkens, W.H., Bruning, H., (1999) Water Res., 33, p. 1173 
504 |a Mills, A., Holland, C.E., Davies, R.H., Warsley, D., (1994) J. Photochem. Photobiol. A: Chem., 83, p. 257 
504 |a Grela, M.A., Brusa, M.A., Colussi, A.J., (1997) J. Phys. Chem. B, 51, p. 10986 
504 |a Regazzoni, A.E., Mandelbaum, P., Matsuyoshi, M., Schiller, S., Bilmes, S.A., Blesa, M.A., (1998) Langmuir, 14, p. 868 
504 |a note; Rubinstein, I., Martin, C.R., Bard, A., (1983) J. Anal. Chem., 55, p. 1580 
504 |a note; Vasudevan, D., Stone, A.T., (1996) Environ. Sci. Technol., 30, p. 1613 
504 |a Bilmes, S.A., Mandelbaum, P., Alvarez, F., Victoria, N.M., (2000) J. Phys. Chem. B, 104, p. 9851 
504 |a Kratochvilová, K., Hoskovcová, I., Jirkovský, J., Klíma, J., Ludvík, J., (1995) Electrochim. Acta, 40, p. 2603 
504 |a López, M., Taverna Porro, M., Calvo, M.E., Candal, R.J., Bilmes, S.A., (2001) XII Congreso Argentino de Fisicoquímica y Química Inorgánica, , San Martín de los Andes, paper B50 
520 3 |a Processes that occur in the TiO 2 -photocatalysis of binary aqueous solutions containing model photolytes with different affinity for the TiO 2 surface (methanol and oxalic and salicylic acids) are analyzed from the photoelectrochemical response of TiO 2 films under bias in a time window of 1-100 s. Long-lived oxidized intermediates produced upon illumination at 0.6 V SCE are detected by cathodic sweep run in the dark after irradiation. The main conclusion derived from this work is that a scheme of competitive kinetics describes only those cases in which one of the components is weakly or nonadsorbed on TiO 2 , whereas for two photolytes with high affinity for the surface cooperative effects may occur. The methanol-oxalate system is quantitatively modeled by considering that oxalate forms surface complexes with different reactivity and a parallel pathway for hole transfer to -OH and adsorbed oxalate. In this case as well as for electrolytes containing methanol and salicylate photooxidation of methanol (with low affinity for the surface) via intermediates formed by reaction with trapped holes (- • OH) is partially or fully suppressed. For electrolytes containing oxalic and salicylic acids in which both components chemisorb on TiO 2 the photoelectrochemical response depends on preadsorption, the photooxidation pathways deviates those of single component systems, and there is remotion of salicylate adsorbed byproducts assigned to cooperative effects.  |l eng 
593 |a INQUIMAE-DQIAQF, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab. II, C1428EHA Buenos Aires, Argentina 
690 1 0 |a PHOTOLYTES 
690 1 0 |a BINARY MIXTURES 
690 1 0 |a CHARGE TRANSFER 
690 1 0 |a ELECTROLYTES 
690 1 0 |a METHANOL 
690 1 0 |a PHOTOELECTRICITY 
690 1 0 |a PHOTOOXIDATION 
690 1 0 |a TITANIUM OXIDES 
690 1 0 |a PHOTOCATALYSIS 
690 1 0 |a ELECTROLYTE 
690 1 0 |a METHANOL 
690 1 0 |a OXALIC ACID 
690 1 0 |a SALICYLIC ACID 
690 1 0 |a TITANIUM DIOXIDE 
690 1 0 |a AQUEOUS SOLUTION 
690 1 0 |a BINARY MIXTURE 
690 1 0 |a FILM 
690 1 0 |a ORGANIC COMPOUND 
690 1 0 |a OXIDATION 
690 1 0 |a TITANIUM DIOXIDE 
690 1 0 |a ADSORPTION 
690 1 0 |a AQUEOUS SOLUTION 
690 1 0 |a ARTICLE 
690 1 0 |a CATALYSIS 
690 1 0 |a FILM 
690 1 0 |a ILLUMINATION 
690 1 0 |a IRRADIATION 
690 1 0 |a PHOTOOXIDATION 
690 1 0 |a ADSORPTION 
690 1 0 |a COLORING AGENTS 
690 1 0 |a KINETICS 
690 1 0 |a METHANOL 
690 1 0 |a ORGANIC CHEMICALS 
690 1 0 |a OXALIC ACID 
690 1 0 |a OXIDATION-REDUCTION 
690 1 0 |a PHOTOCHEMISTRY 
690 1 0 |a SALICYLIC ACID 
690 1 0 |a TITANIUM 
690 1 0 |a WATER POLLUTANTS, CHEMICAL 
700 1 |a Candal, R.J. 
700 1 |a Bilmes, S.A. 
773 0 |d 2001  |g v. 35  |h pp. 4132-4138  |k n. 20  |p Environ. Sci. Technol.  |x 0013936X  |w (AR-BaUEN)CENRE-14  |t Environmental Science and Technology 
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856 4 0 |u https://doi.org/10.1021/es010613r  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_0013936X_v35_n20_p4132_Calvo  |y Handle 
856 4 0 |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0013936X_v35_n20_p4132_Calvo  |y Registro en la Biblioteca Digital 
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999 |c 62897 

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