Photocatalytic Activity of Gamma-irradiated TiO2

Hung-Ho Chung; Myun-Joo Lee; Jinho Jung; Sang-Won Choi

Journal of Industrial and Engineering Chemistry, Vol.8, No.5, 483-487, September, 2002

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Photocatalytic Activity of Gamma-irradiated TiO2

Hung-Ho Chung^†, Myun-Joo Lee, Jinho Jung¹, and Sang-Won Choi²

Radioisotope & Radiation Application Team, Korea Atomic Energy Research Insitute, Daejeon 305-353, Korea
¹Division of Envirionmental Science & Ecological Engineering, Korea University, Seoul 136-701, Korea
²Department of Industrial Chemistry, College of Engineering, Yosu National University, Yosu 550-749, Korea

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Anatase TiO2 powders were treated by gamma-irradiation. The change of catalysts and their effect on the production of hydroxyl radicals were characterized by electron paramagnetic resonance (EPR) spectroscopy. Anatase TiO2 showed four typical peaks at g=2.005, g=1.992, g=1.973, and g=1.951. The intensity of the peaks was increased by gamma-irradiation, and the increase was positively dependent on irradiation dose. The intensity of the peaks is deeply related to the efficiency of hydroxyl radical production by photocatalysis, and the efficiency was directly proportional to the difference of Ti(3+) (g=1.992) and O(-)(g=2.005) intensity. Moreover, the photooxidative decomposition of perchloroethylene (PCE) was linearly dependent on the efficiency of hydroxyl radical production.

Keywords:Anstase TiO2;EPR;Gamma-irradation;Hydroxyl radicals;Photocatalysis;PCE

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[Referenced By]

[1] Nakaoka Y, Nasaka Y, J. Photochem. Photobiol. A-Chem., 110, 299 (1997)

[2] Chungm HH, Rho JS, J. Ind. Eng. Chem., 5(4), 261 (1999)

[3] Jung KY, Park SB, J. Photochem. Photobiol. A-Chem., 127, 117 (1999)

[4] Hong SS, Ju CS, Lim CG, Ahn BH, Lim KT, Lee GD, J. Ind. Eng. Chem., 7(2), 99 (2001)

[5] Kim SB, Jang HT, Hong SC, J. Ind. Eng. Chem., 8(2), 156 (2002)

[6] Morelli R, Bellobono IR, Chiodaroli CM, Alborghetti S, J. Photochem. Photobiol. A-Chem., 112, 271 (1998)

[7] Hoffmann MR, Martin ST, Choi WY, Bahnemann DW, Chem. Rev., 95(1), 69 (1995)

[8] Mahe E, Devilliers D, Electrochim. Acta, 46(5), 629 (2000)

[9] Navio JA, Colon G, Macias M, Real C, Litter MI, Appl. Catal. A: Gen., 177(1), 111 (1999)

[10] Ohtani B, Ogawa Y, Nishimoto S, J. Phys. Chem. B, 101(19), 3746 (1997)

[11] Fox MA, Dulay MT, Chem. Rev., 93, 54 (1993)

[12] Fotou GP, Pratsinis SE, Chem. Eng. Commun., 151, 251 (1996)

[13] Torimoto T, Fox RJ, Fox MA, J. Electrochem. Soc., 143(11), 3712 (1996)

[14] Grismanovs V, Kumada T, Tanifuji T, Nakawa T, Radiat. Phys. Chem., 58, 113 (2000)

[15] Hu Q, Tanaka S, Yoneoka T, Noda T, Nucl. Instrum. Methods Phys. Res. B, 166-167, 70 (2000)

[16] Sumita T, Otsuka H, Kubota H, Nagata M, Honda Y, Miyagawa R, Tsurushima T, Sadoh T, Nucl. Instrum. Methods Phys. Res. B, 148, 758 (1999)

[17] Bensimon Y, Deroide B, Zanchetta JV, J. Phys. Chem. Solids, 60, 813 (1999)

[18] Chung HH, Jung J, Yoon JH, Lee MJ, Catal. Lett., 76(3-4), 247 (2001)

[19] Han SK, Ichikawa K, Utumi H, Water Res., 32, 3261 (1998)

[20] Lu G, Xu K, Li S, Mater. Lett., 21, 251 (1994)

[21] Utumi H, Han SK, Ichikawa K, Water Sci. Technol., 38, 147 (1998)

[22] Howe RF, Gratzel M, J. Phys. Chem., 89, 4495 (1985)

[23] Howe RF, Gratzel M, J. Phys. Chem., 91, 3906 (1987)