e-journal

Synthesis of visible light-active nanostructured TiOx (x < 2) photocatalysts in a flame aerosol reactor

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Abstract.
Titanium dioxide is a wide band gap (3.2 eV) semiconductor which is photo-active when irradiated with
UV light. For wider scale use of TiO2 as a photocatalyst, its activity needs to be extended to the visible light region (constituting 45% of total incident solar energy). A diffusion flame aerosol reactor (FLAR) with an oxygen lean environment in the particle formation zone has been used to synthesize oxygen deficient
titanium suboxide (TiOx with x < 2) nanoparticles. Using a standard-based electron energy loss
spectroscopy (EELS) technique, the non-stoichiometry (x in TiOx) in the flame synthesized particles has
been quantified with high accuracy (uncertainty less than 3%). Under an oxygen lean environment in the
particle formation zone, the non-stoichiometry in the TiOx particles is a function of the flame
temperature. The value of x in the flame synthesized TiOx nanoparticles is in the range of 1.88 < x < 1.94.
Diffuse reflectance spectra confirmed that the oxygen deficient TiOx particles absorbed visible light.
Visible light activity of the TiOx particles is demonstrated by photocatalytic degradation of methyl orange
solution under visible light illumination.

Keywords: Oxygen deficient, Titanium dioxide, Flame aerosol reactor, Visible light photocatalytic activity, Nanoparticle.

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Informasi Detail

Judul Seri

Applied Catalysis B: Environmental

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Applied Catalysis B: Environmental 86 (2009) 145–151

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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