Continuous one-step synthesis of N-doped titania under supercritical and subcritical water conditions for photocatalytic reaction under visible light

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N-doped titania was prepared continuously by one-step synthetic method under supercritical and subcritical water conditions using titanium(IV)tetraisopropoxide (TTIP) and nitric acid as a titania precursor and nitrogen source, respectively. The synthesized N-doped titania particles were characterized by XRD, N-2-adsorption, TEM, XPS, UV-vis diffuse reflectance spectroscopy. N-doped titania was successfully synthesized and its crystalline structure was homogenous anatase phase with high surface area. The absorption edge of synthesized N-doped titania shifted into the visible light region compared with commercial titania P25. All synthesized N-doped titania have higher photocatalytic activity than P25 under visible light irradiation. The photocatalytic activity of N-doped titania synthesized under supercritical water condition was the highest for the degradation of methyl orange under visible light due to the larger crystallite size compared with the N-doped titania synthesized under subcritical water condition.
Publisher
Elsevier
Issue Date
2010-04
Keywords

Oxides; Semiconductors; Chemical synthesis; Photoelectron spectroscopy

Citation

Journal of Physics and Chemistry of Solids, Vol.71, pp.608-611

ISSN
0022-3697
DOI
10.1016/j.jpcs.2009.12.048
URI
http://hdl.handle.net/10203/24048
Appears in Collection
CBE-Conference Papers(학술회의논문)

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