Biomimetic Mineralization of BaCO 3 Microstructures By Simple CO 2 Diffusion Method

Abstract

Bariu m carbonate (BaCO3) microstructures have been synthesized in aqueous solution under ambient condi- tions with PABA (p-amino benzoic acid) and HEEDTA (N-(2 hydroxyethyl) ethylenediamine-N, N', N '' - triacetic acid) as simp le additives. In this study we demonstrate that the integration of both the additives, PABA and HEEDTA under different experimental conditions, such as crystallization sites and pH will extend the possibilities for controlling the shape and size on microstructures of the inorganic crystals by means of a slow CO2 simple d iffusion route. The influence of variation of pH condition with two different additives on the particle size and morphology was investigated. Scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray powder diffracto metry were used to characterize the products. The results indicate that bunch like dendrit ic and limpet teeth shaped, BaCO3 microstructures were obtained. Increasing pH led to the separation of rods from the co mplex structures.