Original scientific paper
The Visible Light Activity of the TiO2 and TiO2:V4+ Photocatalyst
Nguyen Minh Thuy
; Department of Physics, Hanoi National University of Education, Hanoi, Vietnam
Duong Quoc Van
; Department of Physics, Hanoi National University of Education, Hanoi, Vietnam
Le Thi Hong Hai
; Department of Chemistry, Hanoi National University of Education, Hanoi, Vietnam
Abstract
TiO2 and vanadium‐doped TiO2 nanoparticles were synthesized by using the hydrothermal method. The V doping contents are 0.0; 0.1; 0.3; 0.5; 0.7 and 0.9% molar.
The vanadium‐doped TiO2 nanoparticles have identical anatase phase with an average crystal size of 10‐20nm. The oleic acid and ethanol solvents with different molar concentrations can make spherical nanograins, or stick form grains, which influence the photo activity of the materials. The absorption spectra of doped samples exhibited long-tailed absorption in the visible light region above 380nm.
The visible light photocatalytic activity was evaluated by the degradation of phenol aqueous solutions; after 360 min. under the visible irradiation, the normalized concentration of phenol decreased to 9%.
Keywords
semiconductors; nanocrystals; photocatalysts; absorption; irradiation
Hrčak ID:
142880
URI
Publication date:
1.1.2012.
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