Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 175, Issue 1-3, Pages 429-438Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2009.10.024
Keywords
Silver; Vanadium oxide; Titania; Nanocomposite; Dye; Photocatalysis
Categories
Funding
- Chinese Ministry of Education [308008]
- Program for Changjiang Scholars and Innovative Research Team in University
- Natural Science Fund Council of China [20873018, 50878041, 50778036]
- Analysis and Testing Foundation of Northeast Normal University
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Titania nanocomposite codoped with metallic silver and vanadium oxide was prepared by a one-step sol-gel-solvothermal method in the presence of a triblock copolymer surfactant (P123). The resulting Ag/V-TiO2 three-component junction system exhibited an anatase/rutile (weight ratio of 73.8:26.2) mixed phase structure, narrower band gap (2.25 eV), and extremely small particle sizes (ca. 12 nm) with metallic Ag particles well distributed on the surface of the composite. The Ag/V-TiO2 nanocomposite was used as the visible- and UV-light-driven photocatalyst to degrade dyes rhodamine B (RB) and coomassie brilliant blue G-250 (CBB) in an aqueous Solution. At 1.8% Ag and 4.9% V doping, the Ag/V-TiO2 system exhibited the highest visible- as well as UV-light photocatalytic activity: additionally, the activity of the three-component system exceeded that of Degussa P25, pure TiO2, single-doped TiO2 system (Ag/TiO2 or V-TiO2) as well as P123-free-Ag/V-TiO2 codoped system. The reasons for this enhanced photocatalytic activity were revealed. (C) 2009 Elsevier B.V. All rights reserved.
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