title: Synthesis and Reaction Chemistry of Nanosize Monosodium Titanate.
abstract: This paper describes the synthesis and peroxide-modification of nanosize monosodium titanate (nMST), along with an ion-exchange reaction to load the material with Au(III) ions. The synthesis method was derived from a sol-gel process used to produce micron-sized monosodium titanate (MST), with several key modifications, including altering reagent concentrations, omitting a particle seed step, and introducing a non-ionic surfactant to facilitate control of particle formation and growth. The resultant nMST material exhibits spherical-shaped particle morphology with a monodisperse distribution of particle diameters in the range from 100 to 150 nm. The nMST material was found to have a Brunauer-Emmett-Teller (BET) surface area of 285 m(2)g(-1), which is more than an order of magnitude higher than the micron-sized MST. The isoelectric point of the nMST measured 3.34 pH units, which is a pH unit lower than that measured for the micron-size MST. The nMST material was found to serve as an effective ion exchanger under weakly acidic conditions for the preparation of an Au(III)-exchange nanotitanate. In addition, the formation of the corresponding peroxotitanate was demonstrated by reaction of the nMST with hydrogen peroxide.
authors.affiliation: Savannah River Consulting, L.L.C.
authors.forename: Mark C
authors.initials: MC
authors.lastname: Elvington
authors.affiliation: Savannah River National Laboratory; Kathryn.Taylor-Pashow@srnl.doe.gov.
authors.forename: Kathryn M L
authors.initials: KM
authors.lastname: Taylor-Pashow
authors.affiliation: Savannah River National Laboratory.
authors.forename: Michael H
authors.initials: MH
authors.lastname: Tosten
authors.affiliation: Savannah River National Laboratory.
authors.forename: David T
authors.initials: DT
authors.lastname: Hobbs
mesh_terms: D016503:Drug Delivery Systems / Q000379:methods*; D006801:Humans; D008672:Metals, Alkali / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D012964:Sodium / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D008672:Metals, Alkali; C009495:titanium dioxide; D012964:Sodium; D014025:Titanium