Open AccessThe Visible Light Activity of the TiO2 and TiO2:V4+ Photocatalyst
Author(s) -
Nguyễn Minh Thủy,
Duong Quoc Van,
Lê Thị Hồng Hải
Publication year - 2012
Publication title -
nanomaterials and nanotechnology.
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.412
H-Index - 21
ISSN - 1847-9804
DOI - 10.5772/55318
Subject(s) - photocatalysis , materials science , visible spectrum , anatase , aqueous solution , nanoparticle , absorption (acoustics) , vanadium , hydrothermal circulation , absorption spectroscopy , nuclear chemistry , doping , oleic acid , crystal (programming language) , analytical chemistry (journal) , chemical engineering , nanotechnology , optics , chemistry , catalysis , organic chemistry , optoelectronics , biochemistry , physics , engineering , metallurgy , composite material , programming language , computer science
TiO2 and vanadium‐doped TiO2 nanoparticleswere synthesized by using the hydrothermal method. TheV doping contents are 0.0; 0.1; 0.3; 0.5; 0.7 and 0.9% molar.The vanadium‐doped TiO2 nanoparticles have identicalanatase phase with an average crystal size of 10‐20nm. Theoleic acid and ethanol solvents with different molarconcentrations can make spherical nanograins, or stick formgrains, which influence the photo activity of the materials.The absorption spectra of doped samples exhibited longtailedabsorption in the visible light region above 380nm.The visible light photocatalytic activity was evaluated bythe degradation of phenol aqueous solutions; after 360min. under the visible irradiation, the normalizedconcentration of phenol decreased to 9%