Lamellar Phases Containing Vanadium Oxide: Synthesis, Characterization and Application of the Adsorption of Phenol from Aqueous Solutions

Journal of Nanoscience and Nanotechnology, Volume 11, Number 7, July 2011 , pp. 6437-6442(6)

Lamellar Phases Containing Vanadium Oxide: Synthesis, Characterization and Application of the Adsorption of Phenol from Aqueous Solutions

Kim, Ha-Yeong; Vo, Vien; Kim, Youngmee; Kim, Sung-Jin

Abstract:

Lamellar phases of the general formula [C_nH_2n+1N(CH₃)₃]VO₃ (n = 14, 16, 18) were prepared by an ion-exchange/precipitation reaction of alkyltrimethylammonium surfactants and NaVO₃ in an aqueous medium at room temperature. The phases were characterized by powder X-ray diffraction, transmission electron microscopy, infrared spectroscopy, thermogravimetric analysis and differential scanning calorimetry.

Data indicate a proposed crystal structure model wherein single arrays of the one-dimensional chains of oligomers {(VO₃)_n}ⁿ⁻ that may be generated from the starting material NaVO₃ fragmented by the hydration during the dissolution into water and the surfactants layers alternate.

The alkyl chains of the surfactants in these materials are arranged as monolayers or deeply penetrate into the interlayer region with a tilt angle of 37°. The phenol adsorption in aqueous solution on a representative lamellar phase was investigated. The data being fitted to Langmuir Isotherms and a maximum adsorption capacity calculated from the Langmuir equation to be 178.6 mg of phenol/g for [C₁₆H₃₃N(CH₃)₃]VO₃ have been obtained.

Full Text Source (Subscription or Fee): http://www.ingentaconnect.com/content/asp/jnn/2011/00000011/00000007/art00156