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Effects of Preparation Parameters on Room Temperature Formation of Vanadium‐Doped TiO 2 Nanocrystalline Powder
Author(s) -
Zhao Gaoling,
Li Hong,
Zhang Junjuan,
Chen Zhijun,
Han Gaorong,
Song Bin
Publication year - 2011
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.04033.x
Subject(s) - vanadium , nanocrystalline material , photocatalysis , materials science , x ray photoelectron spectroscopy , titanium , diffractometer , crystallization , analytical chemistry (journal) , inorganic chemistry , scanning electron microscope , chemistry , chemical engineering , nanotechnology , metallurgy , organic chemistry , engineering , composite material , catalysis
Vanadium‐doped titania (TiO 2 ) nanocrystalline was obtained at room temperature by cohydrolysis of tetrabutyl titanate and vanadium (IV) oxyacetyl acetonate in large amount of water. The shape of crystal grains formed at room temperature is irregular, and their average size is <10 nm. X‐ray diffractometer, high‐resolution transmission electron microscope, ultraviolet (UV)/Vis spectrometer, energy dispersion spectroscopy, and X‐ray photoelectron spectrometer were used to study the effects of vanadium amount, pH value, and water dosage on the crystallization behavior, optical properties, and photocatalytic activity of thus‐obtained vanadium‐doped TiO 2 . The results showed that enough acidity at least pH (pH=2) and excessive water at least water dosage r =120 are necessary to obtain crystallized vanadium‐doped TiO 2 at room temperature. Optical absorption results showed that the absorption edge of vanadium‐doped TiO 2 shifted to longer wavelength comparing with the counterpart without vanadium. Thus‐prepared vanadium‐doped TiO 2 nanocrystallines can utilize visible light well. The photodegradation results revealed that thus‐prepared vanadium‐doped TiO 2 nanocrystalline has photocatalytic activity under daylight irradiation.