title: Preparation of TiO2 anatase nanocrystals by TiCl4 hydrolysis with additive H2SO4.
abstract: A new methodology was developed to synthesize uniform titania anatase nanocrystals by the hydrolysis of titanium chloride in sulfuric acid aqueous solutions at 0-90°C. The samples were characterized by Raman spectroscopy, UV-visible spectroscopy, transmission electron microscopy (TEM), electron diffraction (ED), and an Energy dispersive X-ray spectroscopy (EDS). The effects of the reaction temperature, mole ratio of SO(4)(2-) to Ti(4+), and the calcinations temperature on the particle size and crystal phase were investigated. Depending on the acidity, the hydrolysis temperature, and the calcination temperature, rhombic anatase nanocrystals sizes in the range of 10 nm to 50 nm were obtained. In the additive of sulfuric acid, Raman spectra and electron diffraction confirmed that the nanoparticles are composed of anatase TiO(2). No other titania phases, such as rutile or brookite, were detected.
authors.affiliation: Department of Chemistry and Biology, Jackson State University, Jackson, Mississippi, United States of America. wenbinglee@gmail.com
authors.forename: Wenbing
authors.initials: W
authors.lastname: Li
authors.forename: Tingying
authors.initials: T
authors.lastname: Zeng
mesh_terms: D006868:Hydrolysis; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles; D010316:Particle Size; D013056:Spectrophotometry, Ultraviolet; D013059:Spectrum Analysis, Raman; D013464:Sulfuric Acids / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*; D014965:X-Rays
chemical_list: D013464:Sulfuric Acids; C009495:titanium dioxide; C025096:titanium tetrachloride; D014025:Titanium; C033158:sulfuric acid