A Study of Photocatalytic Oxidation of Indanthrene Red LGG an Anthraquinone Vat Dye on TiO2

• Autorzy: Geetha Balakrishna R. , Gomathi Devi L.
• Języki publikacji: EN

Abstrakty

EN

Nanometer-sized powder of TiO2 is prepared by chemical methods of gel to crystalline conversion. The crystallite sizes obtained are in the range of 160? to 180 ?,as estimated by Scanning Electron Microscopic (SEM) and X-ray diffraction studies. The photocatalytic activity of this powder in the mineralization of Indanthrene Red LGG is evaluated. The maximum photocatalytic activity is observed in the system, in which the photocatalyst is used in the presence of an oxidizing agent. The effect of inorganic oxidizing species to act as an electron scavenger, thus, influencing the rate of photocatalytic degradation, is studied. Extent of degradation is followed by UV-visible and IR spectroscopy. Based on the results, a kinetic model for the degradation is proposed.

Słowa kluczowe

EN

semiconductor photocatalyst; indanthrene red; photodegradation; spectroscopy

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2005
• Tom: Vol. 79 / nr 5
• Strony: 919--931
• Opis fizyczny: Bibliogr. 19 poz., rys.

Twórcy

autor

Geetha Balakrishna R.

• Department of Post Graduate Studies in Chemistry, Central College Campus, Bangalore University, Bangalore-560 001, India

autor

Gomathi Devi L.

• Department of Post Graduate Studies in Chemistry, Central College Campus, Bangalore University, Bangalore-560 001, India

Bibliografia

• 1.Fujishima A. and Honda K., Nature, 37, 238 (1972).
• 2.Julliard M. and Chanon M„ Chem. Rev., 83, 425 (1982).
• 3.Kavamos G..J. and Tuiro N., J Chem. Rev., 86, 401 (1986).
• 4.Fox M.A. and Dulay M.T., Chem. Rev., 93, 341 (1993).
• 5.Kamat P.V., Chem. Rev., 93, 267 (1993).
• 6.Linsebigler Amy L., Lu Guangaquan and Yates J.T. Jr., Chem. Rev., 95, 735 (1995).
• 7.Bard A.J., J. Phys. Chem., 86, 172 (1982);/ Photochem., 10, 59 (1979).
• 8.Bard A.J.,J. Science, 207, 139 (1980).
• 9.Gomathi Devi L. and Krishniah G.M., J. Photochem. Photobiol. A: Chem., 121, 141 (1999).
• 10.Kutty T.R.N. and Padmini P., Material chemistry and physics, 39, 200 (1995).
• 11.Ahuja S. and Kutty T.R.N., / Photochem. Photobiol. A: Chem., 97, 99 (1996).
• 12.Parker 11., Proc. Roy. Soc. Ser., 235, 518 (1956).
• 13.Parker H., Proc Roy. Soc. Ser., 220, 104 (1953).
• 14.Lee J. and Seliger H.H., J. Chem. Phys., 40, 519 (1964).
• 15.Pelizzeti E. and Minero C., Electro Chim. Acta, 38,47 (1993).
• 16.Kosmann C., Bahnemann P.W. and Hoffmann M.R..J. Photochem. Photobiol. A: Chem., 48,161 (1989).
• 17.Sabin F., Turk T. and Vogler A., J. Photochem. Photobiol. A: Chem., 63, 99 (1992).
• 18.Silverstein R.M., Bassler G.C. and Morii T.C., Spectroscopic identification of organic compounds, 4th edition, Wiley (1981).
• 19.Nakanishi K. and Solomon P.H., Infrared absorption spectroscopy, 2nd edition, Holden-day, Inc. (1977).