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Novel method for preparation of high visible active N-doped TiO2 photocatalyst with its grinding in solvent

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Abstract.
This work is focused on improvement on the photo-catalytic activity of a N-doped TiO2 (reference
sample) by its grinding in solvent. Grinding the reference sample in solvent was performed by using a
planetary mill at 200 rpm and 15 min grinding time with one of various solvents such as ethanol, ethyl
acetate dehydrated (EAD), hexane and water. The ground samples were dried at 80 8C to remove the
residual solvents. The prepared sample was characterized by a series of analytical methods including Xray
diffraction (XRD), specific surface area (SSA), particle size, Fourier transform infrared spectroscopy
(FT-IR), thermogravimeter mass spectrometer (TG-MS), X-ray photoelectron spectroscopy (XPS),
Chemiluminescence as well as the photo-catalytic activity with NO gas decomposition. The prepared
sample ground in ethanol showed much improved photocatalytic activity in the wavelength of visible
light region, in comparison with the activity of the reference sample. This may be due to the existence of
abundant electrons on Ti3+/oxygen vacancy sites, which may be generated via current-doubling effect
during the dry operation. On the contrary, the sample prepared in EAD showed the worsened
photocatalytic activity in visible wavelength region, due to the existence of acetate complex on the
surface of the sample as a surface impurity.

Keywords: Surface modification, Ethanol, Current-doubling effect, TiO2 photocatalyst, Grinding

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Informasi Detail

Judul Seri

Applied Catalysis B: Environmental

No. Panggil

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Penerbit

London : Elsevier B.V.., 2008

Deskripsi Fisik

Applied Catalysis B: Environmental 84 (2008) 570–576

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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