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Effect of TiO2/adsorbent hybrid photocatalysts for toluene decomposition in gas phase

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Abstract.
12 hybrid photocatalysts consisting of titania (TiO2) and an adsorbent such asmordenitewere investigated
for the photocatalytic decomposition of toluene, a major indoor contaminant in indoor air. The highest
decomposition ratewas obtained with the use of mordenite and silicon dioxide (SiO2) as additives to TiO2.
The photocatalytic activities of hybrid photocatalysts in decomposing toluene are 1.33 times as high as
pure P25 at the netweight loading of 0.49mg/cm2 under the test condition. Scanning electron microscopy
(SEM) images confirmed that the hybrid photocatalyst films were very porously distributed; TiO2 was
adsorbed on the surface of mordenite and SiO2, increasing the reaction area of TiO2. The unimolecular
Langmuir–Hishelwood model and mass-transfer-based (MTB) methodwere used to evaluate the reaction
coefficients and adsorption equilibrium coefficients of hybrid photocatalysts. It is evidenced that the
reaction areas of two hybrid photocatalystswere 1.52 and 1.64 times larger than that of P25, respectively,
which is the major reason to make the high removal efficiency of toluene.

Keywords:
Absorbents
Hybrid phtotocatalysts
Photocatalytic oxidation (PCO)
Langmuir–Hinshelwood kinetics
Toluene

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Informasi Detail

Judul Seri

Journal of Hazardous Materials

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Journal of Hazardous Materials 168 (2009) 276–281

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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