Preparation advances of hydroxyapatite/ZnO composite using egg-shell

Abstract

In the present work, synthesis and characterization of a Hydroxyapatite (HAp)/Zinc Oxide (ZnO)-based composite in proposed. The Egg-shell (ES) is used as Hydroxyapatite source. We pretend to take advantage of photocatalytic activity of both materials. This composite can be applied in mineralization of organic dyes in waste water. The methodology followed for the preparation of the composite was carry out a Sol-gel of precursor ZnO synthesis, after, it was mixed with the previously synthesized Hydroxyapatite and calcinated at 650 °C. Later, all materials were characterized using of Raman Spectroscopy and X-Ray Diffraction (XRD), to determine the crystalline phases present; Scanning Electron Microscopy (SEM) to obtain the morphology; Energy Dispersive Spectroscopy (EDS) to determine elemental composition. It was possible to synthesize a HAp/ZnO composite, the characterization showed that it was obtained a composite with carbonated hydroxyapatite Type B. It is important to highlight that the method of composite synthesis, it was not a homogeneous synthesis, it is proposed to look for another impregnation method.