Spray-hydrolytic synthesis of highly photoactive mesoporous anatase nanospheres for the photocatalytic degradation of toluene in air

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Spray-hydrolytic synthesis of highly photoactive mesoporous anatase nanospheres for the photocatalytic degradation of toluene in air

Minghua Zhou - Nama Orang; Jiaguo Yu - Nama Orang; Shengwei Liu - Nama Orang; Pengcheng Zhai - Nama Orang; Baibiao Huang - Nama Orang;

Abstract.
Mesoporous titania nanospheres with high specific surface area and good photocatalytic activity were
fabricated on a large scale by a simple spray-hydrolytic method at 90 oC. The as-prepared TiO2 spherical
powders were characterized by X-ray diffraction, N2 adsorption–desorption measurements, field
emission scanning electron microscope, transmission electron microscopy, UV–visible diffuse
reflectance spectra and photocurrent measurements. The photocatalytic activity was evaluated by
photocatalytic decomposition of toluene in air. The effects of calcination temperatures on the
microstructures and photocatalytic activity of the TiO2 powders were investigated and discussed. The
results revealed that a large amount of mesoporous titania nanospheres could spontaneously form by
self-assembly of countless tiny TiO2 primary nanoparticle during the spray hydrolysis at 90 oC. The
calcination temperature exhibited a strong effect on the microstructures and photocatalytic activity of
the prepared titania. The 400 oC-calcined sample showed the highest photocatalytic activity and was
about two times higher than that of Degussa P25. At 600 oC, the photocatalytic activity decreased
because of the destruction of bimodal mesoporous structure of the titania and the drastic decrease of
specific surface areas.

Keywords: Titania, Mesoporous, Nanospheres, Spray hydrolysis, Photocatalytic activity, Photocurrent, Toluene

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Judul Seri: Applied Catalysis B: Environmental
No. Panggil: -
Penerbit: London : Elsevier B.V.., 2009
Deskripsi Fisik: Applied Catalysis B: Environmental 89 (2009) 160–166
Bahasa: English
ISBN/ISSN: -
Klasifikasi: -
Tipe Isi: -
Tipe Media: -
Tipe Pembawa: -
Edisi: -
Subjek: KIMIA
Info Detail Spesifik: -
Pernyataan Tanggungjawab: agus

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Spray-hydrolytic synthesis of highly photoactive mesoporous anatase nanospheres for the photocatalytic degradation of toluene in air

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