Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29411
Title: Photocatalytic degradation of X-3B dye by visible light using lanthanide ion modified titanium dioxide hydrosol system
Authors: Xie, Y
Yuan, C
Li, X
Keywords: Lanthanide ion modification
Photoactivity
Sol photocatalyst
TiO 2
Visible light
Issue Date: 2005
Publisher: Elsevier
Source: Colloids and surfaces. A, Physicochemical and engineering aspects, 2005, v. 252, no. 1, p. 87-94 How to cite?
Journal: Colloids and surfaces. A, Physicochemical and engineering aspects 
Abstract: The present work was focused on photocatalytic activity of sol photocatalysts. The lanthanide neodymium ion modified titania sol was prepared by chemical coprecipitation-peptization method and its photoactivity was studied by investigating the photodegradation efficiency of active brilliant red dye X-3B in hydrosol reaction system. It was noted that pure TiO 2 and Nd 3+-TiO 2 sol particles had anatase crystalline structure, uniform nanoparticles distribution and spheral particle morphology, which were prepared at low temperature (70°C), ambient pressure and acidic condition (pH 1.5). This preparation method was much better than traditional high temperature calcination process to fabricate crystal TiO 2. The average size was 10 nm for Nd 3+-TiO 2 and 25 nm for TiO 2 sol particles. The sol photocatalysts in hydrosol system demonstrated better interfacial adsorption effect and photoactivity than commercial P25 TiO 2 powder in suspension system, which was due to small particle size and well nanoparticles dispersion. Moreover, under visible light irradiation (vis, λ > 400 nm), Nd 3+-TiO 2 sol showed higher photocatalytic activity than TiO 2 sol, which was ascribed to the electron trapping effect of modified Nd 3+ ion on TiO 2 sol particles. Additionally, photosensitization-photocatalysis mechanism was discussed in the VIS/X-3B/Nd 3+-TiO 2 hydrosol reaction system.
URI: http://hdl.handle.net/10397/29411
ISSN: 0927-7757
EISSN: 1873-4359
DOI: 10.1016/j.colsurfa.2004.10.061
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