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Abstract:

Titanium-supported titania-based photoelectrodes were prepared either by sol-gel processes or by thermal oxidation. Catalytic activities and stabilities of these photoelectrodes were monitored by photooxidizing formic acid in aqueous NaCl during three successive experiments under identical conditions. Although electrodes coated with either titania (higher activity) or zirconia-titania (lower activity) and heated at 300°C were less active initially than similar electrodes heated to higher temperatures, electrodes heated at 300°C were more stable. Activities of titania electrodes were increased by depositing the titania at a higher withdrawal speed (21.5 versus 1.5 cm min-1) and by depositing more layers of titania. Stabilities of multilayer electrodes were improved by depositing the sol faster. Applying positive electrical potentials across electrodes also increased their activities. In particular, while activities diminished considerably in relatively high concentrations of NaCl if no potential was present, activities decreased only slightly under an electrical field. Activities of photoelectrodes prepared by heating metallic titanium plates at 300°C were low. Activities of photoelectrodes prepared by heating titanium at 500°C (giving a rutile coating) were similar to activities of photoelectrodes prepared by sol-gel techniques, but only when potentials were applied. Titanium-supported titania-based photoelectrodes were prepared either by sol-gel processes or by thermal oxidation. Catalytic activities and stabilities of these photoelectrodes were monitored by photooxidizing formic acid in aqueous NaCl during three successive experiments under identical conditions. Although electrodes coated with either titania (higher activity) or zirconia-titania (lower activity) and heated at 300 °C were less active initially than similar electrodes heated to higher temperatures, electrodes heated at 300 °C were more stable. Activities of titania electrodes were increased by depositing the titania at a higher withdrawal speed (21.5 versus 1.5 cm min-1) and by depositing more layers of titania. Stabilities of multilayer electrodes were improved by depositing the sol faster. Applying positive electrical potentials across electrodes also increased their activities. In particular, while activities diminished considerably in relatively high concentrations of NaCl if no potential was present, activities decreased only slightly under an electrical field. Activities of photoelectrodes prepared by heating metallic titanium plates at 300 °C were low. Activities of photoelectrodes prepared by heating titanium at 500 °C (giving a rutile coating) were similar to activities of photoelectrodes prepared by sol-gel techniques, but only when potentials were applied.

Registro:

Documento: Artículo
Título:Titanium-supported titania photoelectrodes made by sol-gel processes
Autor:Candal, R.J.; Zeltner, W.A.; Anderson, M.A.
Ciudad:Reston, VA, United States
Filiación:INQUIMAE, Universidad de Buenos Aires, Ciudad Universitaria, CP 1428, Buenos Aires, Argentina
Water Chem. Program, Univ. of Wisconsin, Madison, 660 North Park St., Madison, WI 53706, United States
Water Chem. Program, Univ. of Wisconsin, Madison, 660 North Park St., Madison, WI, United States
Palabras clave:Electrodes; Sodium chloride; Sol-gels; Thermooxidation; Titanium oxides; Photoelectrodes; Photooxidizing formic acids; Chemical water treatment; titanium
Año:1999
Volumen:125
Número:10
Página de inicio:906
Página de fin:912
DOI: http://dx.doi.org/10.1061/(ASCE)0733-9372(1999)125:10(906)
Título revista:Journal of Environmental Engineering
Título revista abreviado:J. Environ. Eng.
ISSN:07339372
CODEN:JOEED
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07339372_v125_n10_p906_Candal

Referencias:

  • Abdullah, M., Low, G.K.-C., Matthews, R.W., Effects of common inorganic anions on rates of photocatalytic oxidation of organic carbon over illuminated titanium dioxide (1990) J. Physical Chemistry, 94, pp. 6820-6825
  • Aguado, M.A., Anderson, M.A., Degradation of formic acid over semiconducting membranes supported on glass: Effects of structure and electronic doping (1993) Solar Energy Mat. Solar Cells, 28, pp. 345-361
  • Aguado, M.A., Anderson, M.A., Hill, C.G., Influence of light intensity and membrane properties on the photocatalytic degradation of formic acid over TiO2 ceramic membranes (1994) J. Molec. Catal., 89, pp. 165-178
  • Bideau, M., Claudel, B., Otterbein, M., Photocatalysis of formic acid oxidation by oxygen in an aqueous medium (1980) J. Photochem., 14, pp. 291-302
  • Bums, R.A., Crittenden, J.C., Hand, D.W., Selzer, V.H., Sutter, L.L., Salman, S.R., Effect of inorganic ions in heterogeneous photocatalysis of TCE (1999) J. Envir. Engrg., 125 (1), pp. 77-85. , ASCE
  • Candal, R.J., Zeltner, W.A., Anderson, M.A., TiO2-mediated photoelectrocatalytic purification of water (1998) J. Adv. Oxidat. Technol., 3 (3), pp. 270-276
  • Choi, Y.-K., Seo, S.-S., Chjo, K.-H., Choi, Q.-W., Park, S.-M., Thin titanium dioxide film electrodes prepared by thermal oxidation (1992) J. Electrochem. Soc., 139 (7), pp. 1803-1807
  • Fabes, B.D., Zelinski, B.J.J., Uhlmann, D.R., Sol-gel derived ceramic coatings (1993) Ceramic Films and Coatings, pp. 224-283. , J. B. Wachtman and R. A. Haber, eds., Noyes Publications, Park Ridge, N.J
  • Fernández, A., Preparation and characterization of TiO2 photocatalysts supported on various rigid supports (glass, quartz and stainless steel). Comparative studies of photocatalytic activity in water purification (1995) Appl. Catal. B: Envir., 7, pp. 49-63
  • Finklea, H.O., Semiconductor electrode concepts and terminology (1988) Semiconductor Electrodes, pp. 1-42. , H. O. Finklea, ed., Elsevier Science, New York
  • Finklea, H.O., Titanium dioxide (TiO2) and strontium titanate (SrTiO3) (1988) Semiconductor Electrodes, pp. 43-145. , H. O. Finklea, ed., Elsevier Science, New York
  • Fu, X., Clark, L.A., Yang, Q., Anderson, M.A., Enhanced photocatalytic performance of titania-based binary metal oxides: TiO2/ SiO2 and TiO2/ZrO2." (1996) Envir. Sci. and Technol., 30 (2), pp. 647-653
  • Ha, H.Y., Anderson, M.A., Photocatalytic degradation of formic acid via metal-supported titania (1996) J. Envir. Engrg., 122 (3), pp. 217-221. , ASCE
  • Hidaka, H., A mechanistic study of the photoelectrochemical oxidation of organic compounds on a TiO2/TCO particulate film electrode assembly (1996) J. Photochem. Photobiol. A: Chem., 98, pp. 73-78
  • Kikkawa, H., O'Regan, B., Anderson, M.A., The photoelectrochemical properties of Nb-doped TiO2 semiconducting ceramic membrane (1991) J. Electroanal. Chem., 309, pp. 91-101
  • Kim, D.H., Anderson, M.A., Photoelectrocatalytic degradation of formic acid using a porous TiO2 thin-film electrode (1994) Envir. Sci. and Technol., 28 (3), pp. 479-483
  • Kim, D.H., Anderson, M.A., Zeltner, W.A., Effects of firing temperature on photocatalytic and photoelectrocatalytic properties of TiO2 (1995) J. Envir. Engrg., 121 (8), pp. 590-594. , ASCE
  • Matsumura, T., Smith, J.M., Photodecomposition kinetics of formic acid in aqueous solution (1970) AIChE J., 16, pp. 1064-1071
  • Mbindyo, J.K.N., Ahmadi, M.F., Rusling, J.F., Pollutant decomposition with simultaneous generation of hydrogen and electricity in a photogalvanic reactor (1997) J. Electrochem. Soc., 144 (9), pp. 3153-3158
  • Okamoto, K., Yamamoto, Y., Tanaka, H., Tanaka, M., Itaya, A., Heterogeneous photocatalytic decomposition of phenol over TiO2 powder (1985) Bull. Chem. Soc. Japan, 58, pp. 2015-2022
  • Sclafani, A., Palmisano, L., Schiavello, M., Influence of the preparation methods of TiO2 on the photocatalytic degradation of phenol in aqueous dispersion (1990) J. Physical Chemistry, 94, pp. 829-832
  • Tamura, H., Yoneyama, H., Iwakura, C., Murai, T., An effect of heat-treatment on the activity of titanium dioxide film electrodes for photo-sensitized oxidation of water (1977) Bull. Chem. Soc. Japan, 50 (3), pp. 753-754
  • Torresi, R.M., Cámara, O.R., De Pauli, C.P., Giordano, M.C., Hydrogen evolution reaction on anodic titanium oxide films (1987) Electrochim. Acta, 32 (9), pp. 1291-1301
  • Vinodgopal, K., Bedja, I., Kamat, P.V., Nanostructured semiconductor films for photocatalysis. Photoelectrochemical behavior of SnO2/TiO2 composite systems and its role in photocatalytic degradation of a textile azo dye (1996) Chem. Mat., 8 (8), pp. 2180-2187
  • Vinodgopal, K., Hotchandani, S., Kamat, P.V., Electrochemically assisted photocatalysis. TiO2 particulate film electrodes for photocatalytic degradation of 4-chlorophenol (1993) J. Physical Chemistry, 97, pp. 9040-9044
  • Wahl, A., Photoelectrochemical studies pertaining to the activity of TiO2 towards photodegradation of organic compounds (1995) J. Electroanal. Chem., 396, pp. 41-51
  • Xu, Q., Anderson, M.A., Sol-gel route to synthesis of microporous ceramic membranes: Preparation and characterization of microporous TiO2 and ZrO2 xerogels (1994) J. Am. Ceramic Soc., 77 (7), pp. 1939-1945

Citas:

---------- APA ----------
Candal, R.J., Zeltner, W.A. & Anderson, M.A. (1999) . Titanium-supported titania photoelectrodes made by sol-gel processes. Journal of Environmental Engineering, 125(10), 906-912.
http://dx.doi.org/10.1061/(ASCE)0733-9372(1999)125:10(906)
---------- CHICAGO ----------
Candal, R.J., Zeltner, W.A., Anderson, M.A. "Titanium-supported titania photoelectrodes made by sol-gel processes" . Journal of Environmental Engineering 125, no. 10 (1999) : 906-912.
http://dx.doi.org/10.1061/(ASCE)0733-9372(1999)125:10(906)
---------- MLA ----------
Candal, R.J., Zeltner, W.A., Anderson, M.A. "Titanium-supported titania photoelectrodes made by sol-gel processes" . Journal of Environmental Engineering, vol. 125, no. 10, 1999, pp. 906-912.
http://dx.doi.org/10.1061/(ASCE)0733-9372(1999)125:10(906)
---------- VANCOUVER ----------
Candal, R.J., Zeltner, W.A., Anderson, M.A. Titanium-supported titania photoelectrodes made by sol-gel processes. J. Environ. Eng. 1999;125(10):906-912.
http://dx.doi.org/10.1061/(ASCE)0733-9372(1999)125:10(906)