Preparation and Ion Exchange of Layer Structured Cesium Chromium Titanate Cs_xTi_2-xCr_xO₄ (x=0.70)

抄録

A new layer structured chromium titanate Cs_xTi_2-xCr_xO₄ (x=0.70) with a lepidocrocite (γ-FeO(OH)) type structure was prepared by solid state reaction at 800°C using Cs₂CO₃, anatase type TiO₂ and Cr₂O₃ under an argon atmosphere. Ion exchange reactions of Cs⁺ in the interlayer space of the chromium titanate were studied in aqueous solutions. The host layer of the chromium titanate was maintained on the ion exchanges and the products were found to contain an interlayer water. The single phases of hydrated H⁺, Li⁺ and Na⁺ exchange products were obtained from the chromium titanate. Cs⁺ in the interlayer space was leached out up to 91% in the ion exchange. The ion exchange products were characterized by chemical analysis, TG-DTA, X-ray diffraction and optical absorption.