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Received September 14, 2009
Accepted October 29, 2009
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Parameter effect on photocatalytic degradation of phenol using TiO2-P25/activated carbon (AC)
School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus,14300 Nibong Tebal, Pulau Pinang, Malaysia
Korean Journal of Chemical Engineering, July 2010, 27(4), 1109-1116(8), 10.1007/s11814-010-0169-8
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Abstract
P25 powder embedded and TiO2 immobilized on activated carbon (TiO2-P25/AC) was prepared by P25 powder modified sol-gel and dip-coated method. The photocatalysts were characterized by XRD, BET, SEM and their photocatalytic activities were evaluated through phenol degradation in a fluidized bed photoreactor. The addition of P25 in the photocatalysts could significantly enhance the photocatalytic activity, and the optimum loading of P25 was 3 g L^(-1). The operating parameter results indicated that the optimum pH for phenol degradation was 5.2; the effect of air flow rate gave an optimal value of 2 L min^(-1); the increasing of UV light intensity led to an increase of degradation efficiency due to more photons absorbed on the surface of the photocatalyst. The kinetics of the phenol degradation fitted well with the Langmuir-Hinshelwood kinetics model. Finally, the photocatalytic ability of TiO2-P25/AC was reduced only 10% after five cycles for phenol degradation.
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Han JK, Choi SM, Lee GH, Mater. Lett., 61, 3798 (2007)
Li XZ, Liu H, Environ. Sci. Tech., 37, 3989 (2003)
Balasubramanian G, Dionysiou DD, Suidan MT, Baudin I, Audin B, Laine JM, Appl. Catal. B: Environ., 47(2), 73 (2004)
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Dijkstra MFJ, Michorius A, Buwalda H, Panneman HJ, Winkelman JGM, Beenackers AACM, Catal. Today, 66(2-4), 487 (2001)
Zhu H, Zhang MP, Xia ZF, Gary Low KC, Wat. Res., 29, 2681 (1995)
Nam WS, Kim JM, Han GY, Chemosphere., 47, 1019 (2002)
Zhang LF, Kanki T, Sano N, Toyoda A, Sep. Purif. Technol., 31(1), 105 (2003)
Chong MN, Jin B, Zhu HY, Chow CWK, Saint C, Chem. Eng. J., 15, 49 (2009)
Ollis DF, Pelizzatti E, Serpone N, Environ. Sci. Techno., 35, 1523 (1991)
Mehrota K, Yablonsky GS, Ray AK, Chemosphere., 60, 1427 (2005)
Chin ML, Mohamed AR, Bhatia S, Chemosphere., 57, 547 (2004)
Zhu XL, Yuan CW, Bao YC, Yang JH, Wu YZ, J. Mol. Catal. A-Chem., 229(1-2), 95 (2005)
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Toor AP, Verma A, Jotshi CK, Bajpai PK, Singh V, Dye Pigment., 68, 53 (2006)
Okte AN, Yilmaz O, Appl. Catal. B: Environ., 85(1-2), 92 (2008)
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San N, Hatipoglu A, Kocturk G, Cinar Z, J. Photochem. Photobio. A: Chem., 146, 189 (2002)
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Ao YH, Xu JJ, Fu DG, Shen XW, Yuan CW, Colloids Surf. A: Physicochem. Eng. Aspects., 312, 125 (2008)
