Morphologies of barium chromate controlled by carriers in an emulsion liquid membrane system

Morphology-control of barium chromate has been studied in emulsion liquid membrane system. This system consists of Span8O as surfactant, N7301 or TBP as carrier, and kerosene as solvent. When BaCl2 solution was used as internal-aqueous phase and N7301 as carrier, the morphology of products can be varied from crystal wafers to crystal rods. X-ray diffraction and transmission electron microscopy were used to characterize the structure and morphology. A synthetic mechanism has been proposed and the optical properties of the products were also discussed.