Biomimetic Mineralization of BaCO3 Microstructures By Simple CO2 Diffusion Method

Barium carbonate (BaCO3) microstructures have been synthesized in aqueous solution under ambient conditions with PABA (p-amino benzoic acid) and HEEDTA (N-(2 hydroxyethyl) ethylenediamine-N, N’, N’’- triacetic acid) as simple 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 diffusion 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 diffractometry were used to characterize the products. The results indicate that bunch like dendritic and limpet teeth shaped, BaCO3 microstructures were obtained. Increasing pH led to the separation of rods from the complex structures.