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Indexed by:期刊论文

Date of Publication:2010-03-01

Journal:JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS

Included Journals:SCIE、EI

Volume:71

Issue:3

Page Number:156-162

ISSN No.:0022-3697

Key Words:Nanostructures; Optical materials; Chemical synthesis; Optical properties; Surface properties

Abstract:Ultrafine nitrogen-doped TiO2 nanoparticles with narrow particle size distribution, good dispersion, and high surface area were synthesized in the presence of urea and PEG-4000 via a hydrothermal procedure. TEM observation, N-2 adsorption, XRD, UV-vis spectroscopy, the Raman spectroscopy and XPS analysis were conducted to characterize the synthesized TiO2 particles. The synthesized TiO2 particles were a mixture of 49.5% anatase and 50.5% rutile with a size of around 5 nm. The photocatalytic activities were tested in the degradation of an aqueous solution of a reactive Brilliant Blue KN-R under both UV and visible light. The synthesized TiO2 particles showed much higher photocatalytic activity than a commercial P25 TiO2 powder under both UV and visible light irradiations. The high performance is associated to N doping, the reduced particle size, good dispersion, high surface area, and a quantum size effect. (C) 2009 Elsevier Ltd. All rights reserved.