title: Characterization of chemical speciation of titanyl sulfate solutions for production of titanium dioxide precipitates.
abstract: Ion association in concentrated aqueous solutions of titanyl sulfate in sulfuric acid has been investigated at 25 degrees C by Raman spectroscopy under conditions like those used in the preparation of titania nanoparticles. Systematic variation of titanyl (M), sulfate (L), and hydrogen ion concentrations and a detailed quantitative analysis of the spectra reveal that two weak titanyl sulfato complexes (ML and ML(2)) are formed, with ML predominating. This assignment conflicts with the recent results of Baillon et al. (J. Mol. Liq. 2008, 143, 8-12).
authors.affiliation: School of Chemical and Mathematical Sciences, Murdoch University, Murdoch WA 6150, Australia.
authors.forename: István
authors.initials: I
authors.lastname: Szilágyi
authors.forename: Erich
authors.initials: E
authors.lastname: Königsberger
authors.forename: Peter M
authors.initials: PM
authors.lastname: May
mesh_terms: D011232:Chemical Precipitation; D012996:Solutions; D013059:Spectrum Analysis, Raman; D013464:Sulfuric Acids / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D012996:Solutions; D013464:Sulfuric Acids; C009495:titanium dioxide; D014025:Titanium; C033158:sulfuric acid