Photocatalytic oxidation of benzene in air at room temperature was studied in order to obtain the information on its reactivity on the photoirradiated catalyst. The objective of this paper is to describe in detail the dependence of the rate for benzene photooxidation on humidity, initial benzene concentration, and incident light intensity, since they are important factors for construction of VOC control system utilizing solar energy. The reaction mechanism is also discussed to understand the decomposition behavior of benzene.
Issue Section:
Technical Papers
1.
Fu
, X.
, Zeltner
, W. A.
, and Anderson
, M. A.
, 1996
, “Applications in Photocatalytic Purification of Air
,” Stud. Surf. Sci. Catal.
, 103
, pp. 445
–461
.2.
d’Hennezel
, O.
, Pichat
, P.
, and Ollis
, D. F.
, 1998
, “Benzene and Toluene Gas-Phase Photocatalytic Degradation over H2O and HCL Pretreated TiO2: By-Products and Mechanisms
,” J. Photochem. Photobiol., A: Chem.
, 118
(3
), pp. 197
–204
.3.
d’Hennezel
, O.
, and Ollis
, D. F.
, 1997
, “Trichloroethylene-Promoted Photocatalytic Oxidation of Air Contaminants
,” J. Catal.
, 167
(1
), pp. 118
–126
.4.
Larson
, S. A.
, and Falconer
, J. L.
, 1997
, “Initial Reaction Steps in Photocatalytic Oxidation of Aromatics
,” Catal. Lett.
, 44
(1–2
), pp. 57
–65
.5.
Falconer
, J. L.
, and Magrini-Bair
, K. A.
, 1998
, “Photocatalytic and Thermal Catalytic Oxidation of Acetaldehyde on Pt/TiO2,
” J. Catal.
, 179
(1
), pp. 171
–178
.6.
Fu
, X.
, Zeltner
, W. A.
, and Anderson
, M. A.
, 1995
, “The Gas-Phase Photocatalytic Mineralization of Benzene on Porous Titania-Based Catalysts
,” Appl. Catal., B: Environ.
, 6
(3
), pp. 209
–224
.7.
Lichtin
, N. N.
, and Sadeghi
, M.
, 1998
, “Oxidative Photocatalytic Degradation of Benzene Vapor Over TiO2,
” J. Photochem. Photobiol., A: Chem.
, 113
(1
), pp. 81
–88
.8.
Sitkiewitz
, S.
, and Heller
, A.
, 1996
, “Photocatalytic Oxidation of Benzene and Stearic Acid on Sol-Gel Derived TiO2 Thin Films Attached to Glass
,” New J. Chem.
, 20
(2
), pp. 233
–241
.9.
Jacoby
, W. A.
, Blake
, D. M.
, Fennell
, J. A.
, Boulter
, J. E.
, Vargo
, L. A.
, George
, M. C.
, and Dolberg
, S. K.
, 1996
, “Heterogeneous Photocatalysis for Control of Volatile Organic Compounds in Indoor Air
,” J. Air Waste Manage. Assoc.
, 46
, pp. 891
–898
.10.
Uner
, D. O.
, and Ozbek
, S.
, 1999
, “The Deactivation Behavior of the TiO2 Used as a Photo-Catalyst for Benzene Oxidation
,” Stud. Surf. Sci. Catal.
, 126
, pp. 411
–414
.11.
Einaga
, H.
, Futamura
, S.
, and Ibusuki
, T.
, 2002
, “Heterogeneous Photocatalytic Oxidation of Benzene, Toluene, Cyclohexene and Cyclohexane in Humidified Air: Comparison of Decomposition Behavior on Photoirradiated TiO2 Catalyst
,” Appl. Catal., B: Environ.
, 38
(3
), pp. 215
–225
.12.
Einaga
, H.
, Futamura
, S.
, and Ibusuki
, T.
, 1999
, “Photocatalytic Decomposition of Benzene Over TiO2 in a Humidified Airstream
,” Phys. Chem. Chem. Phys.
, 1
(20
), pp. 4903
–4908
.13.
Murov, S. L., 1974, Handbook of Photochemistry, Marcel Dekker, Inc., New York, Sec. 13.
14.
Ohko
, Y.
, Hashimoto
, K.
, and Fijishima
, A.
, 1997
, “Kinetics of Photocatalytic Reactions Under Extremely Low-Intensity UV Illumination on Titanium Dioxide Thin Films
,” J. Phys. Chem. A
, 101
(43
), pp. 8057
–8062
.15.
Aguad
, M. A.
, Anderson
, M. A.
, and Hill
, Jr., C. G.
, 1994
, “Influence of Light Intensity and Membrane Properties on the Photocatalytic Degradation of Formic Acid Over TiO2 Ceramic Membranes
,” J. Mol. Catal.
, 89
(1–2
), pp. 165
–178
.16.
D’Oliveira
, J.-C.
, Al-Sayyed
, G.
, and Pichat
, P.
, 1990
, “Photodegradation of 2- and 3-Chlorophenol in Titanium Dioxide Aqueous Suspensions
,” Environ. Sci. Technol.
, 24
(7
), pp. 990
–996
.17.
Kormann
, C.
, Bahnemann
, D. W.
, and Hoffmann
, M. R.
, 1991
, “Photolysis of Chloroform and Other Organic Molecules in Aqueous Titanium Dioxide Suspensions
,” Environ. Sci. Technol.
, 25
(3
), pp. 494
–500
.18.
Hoffman
, A. J.
, Carraway
, E. R.
, and Hoffmann
, M. R.
, 1994
, “Photocatalytic Production of H2O2 and Organic Peroxides on Quantum-Sized Semiconductor Colloids
,” Environ. Sci. Technol.
, 28
(5
), pp. 776
–785
.19.
Egerton
, T. A.
, and King
, C. J.
, 1979, “The Influence of Light Intensity on Photoactivity in TiO2 Pigmented Systems,” J. Oil. Col. Chem. Assoc., 62, pp. 386–391.20.
Einaga
, H.
, Futamura
, S.
, and Ibusuki
, T.
, 2001
, “Complete Oxidation of Benzene in Gas Phase by Platinized Titania Photocatalysts
,” Environ. Sci. Technol.
, 35
(9
), pp. 1880
–1884
.21.
Schwitzgebel
, J.
, Ekerdt
, J. G.
, Gerischer
, H.
, and Heller
, A.
, 1995
, “Role of the Oxygen Molecule and of the Photogenerated Electron in TiO2-Photocatalyzed Air Oxidation Reactions
,” J. Phys. Chem.
, 99
(15
), pp. 5633
–5638
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