Heterogeneous photocatalytic degradation of ethylene glycol and propylene glycol

Kyung Nam Kim; Michael R. Hoffmann

Korean Journal of Chemical Engineering, Vol.25, No.1, 89-94, January, 2008

DOI10.1007/s11814-008-0015-4 Export Citation

Heterogeneous photocatalytic degradation of ethylene glycol and propylene glycol

Kyung Nam Kim^†, and Michael R. Hoffmann¹

Dept. of Chemical & Environmental Engineering, Daebul University, Jeonnam 526-702, Korea
¹W. M. Keck Laboratories, California Institute of Technology, Pasadena, California 91125, United States

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The photocatalytic decomposition of ethylene glycol and propylene glycol was investigated by using UVilluminated TiO2 and metal-loaded TiO2 catalysts. The effects of pH, initial concentration, and wavelength of light on the decomposition rate of the glycols were explored. Platinum- and palladium-loaded TiO2 catalysts enhanced the rates of photodecomposition compared to unloaded TiO2. The glycols were oxidized primarily to carbon dioxide and water. Formaldehyde was found to be an important reaction intermediate. A detailed chemical reaction mechanism for the destruction of ethylene glycol and propylene glycol in water via free radical pathway and trapped hole reactions at the particle surface is proposed.

Keywords:Ethylene Glycol;Metal Loaded Photocatalyst;Oxidation;Photocatalysis;Photocatalytic Activity;Propylene Glycol;TiO2

[References]

Bahnemann DW, Monig J, Chapman R, J. Phys. Chem., 91(14), 3782 (1987)
Matthews RW, J. Catal., 111, 264 (1988)
Turchi C, Ollis D, J. Catal., 122, 178 (1990)
Lawless D, Serpone N, Meisel D, J. Phys. Chem., 95(13), 5166 (1991)
Lindner M, Bahnemann DW, Hirthe B, Griebler WD, Proceedings of 1995 ASME/JSME/JSES International Solar Energy Conference (1995)
Chen J, Pehkonen SO, Lin CJ, Water Res., 37(10), 2496 (2003)
Zimbron JA, Reardon KF, Water Res., 39(5), 865 (2005)
Kirk-othmer encyclopedia of chemical technology, Wiley, New York (1978)
Broekhuis RR, Lynn S, King CJ, Ind. Eng. Chem. Res., 33(12), 3230 (1994)
Ohtani B, Kakimoto M, Nishimoto S, Kagiya T, J. Photochem. Photobiol. A-Chem., 70, 265 (1993)
Nash T, Biochem. J., 55, 416 (1953)
Smith R, Erhardt P, Anal. Chem., 47, 2462 (1975)
Nimlos M, Wolfrum E, Brewer M, Fennell J, Bintner G, Environ. Sci. Technol., 30, 3102 (1996)
Shin EM, Senthurchelvan R, Munoz J, Basak S, Rajeshwar K, Benglassmith G, Howell BC, J. Electrochem. Soc., 143(5), 1562 (1996)
Matthew R, Water Res., 24, 653 (1990)
Wentworth WE, Batten CF, Wei G, Energy, 12(3), 319 (1987)
Chen L, Gu W, Zhu X, Wang F, Song Y, Hu J, J. Photochem. Photobiol. A-Chem., 74, 85 (1993)
Choi W, Hoffmann MR, Environ. Sci. Technol., 29, 1646 (1995)
Ao CH, Lee SC, Yu JZ, Xu JH, Appl. Catal. B: Environ., 54(1), 41 (2004)

[Referenced By]

[1] Bahnemann DW, Monig J, Chapman R, J. Phys. Chem., 91(14), 3782 (1987)

[2] Matthews RW, J. Catal., 111, 264 (1988)

[3] Turchi C, Ollis D, J. Catal., 122, 178 (1990)

[4] Lawless D, Serpone N, Meisel D, J. Phys. Chem., 95(13), 5166 (1991)

[5] Lindner M, Bahnemann DW, Hirthe B, Griebler WD, Proceedings of 1995 ASME/JSME/JSES International Solar Energy Conference (1995)

[6] Chen J, Pehkonen SO, Lin CJ, Water Res., 37(10), 2496 (2003)

[7] Zimbron JA, Reardon KF, Water Res., 39(5), 865 (2005)

[8] Kirk-othmer encyclopedia of chemical technology, Wiley, New York (1978)

[9] Broekhuis RR, Lynn S, King CJ, Ind. Eng. Chem. Res., 33(12), 3230 (1994)

[10] Ohtani B, Kakimoto M, Nishimoto S, Kagiya T, J. Photochem. Photobiol. A-Chem., 70, 265 (1993)

[11] Nash T, Biochem. J., 55, 416 (1953)

[12] Smith R, Erhardt P, Anal. Chem., 47, 2462 (1975)

[13] Nimlos M, Wolfrum E, Brewer M, Fennell J, Bintner G, Environ. Sci. Technol., 30, 3102 (1996)

[14] Shin EM, Senthurchelvan R, Munoz J, Basak S, Rajeshwar K, Benglassmith G, Howell BC, J. Electrochem. Soc., 143(5), 1562 (1996)

[15] Matthew R, Water Res., 24, 653 (1990)

[16] Wentworth WE, Batten CF, Wei G, Energy, 12(3), 319 (1987)

[17] Chen L, Gu W, Zhu X, Wang F, Song Y, Hu J, J. Photochem. Photobiol. A-Chem., 74, 85 (1993)

[18] Choi W, Hoffmann MR, Environ. Sci. Technol., 29, 1646 (1995)

[19] Ao CH, Lee SC, Yu JZ, Xu JH, Appl. Catal. B: Environ., 54(1), 41 (2004)