Analysis of the conversion of Cadmium carbonate (CdCO3) to Cadmium oxide (CdO) in thin films with photocatalytic application

Abstract

The Cadmium Carbonate (CdCO3) films were successfully synthesized using the chemical bathroom deposition (CBD) technique to vary later the temperature from 30 ° C, 150 ° C, 300 ° C, 400 ° C and 500 ° C with the CdO was obtained. A step-by-step study was carried out of the chemical reaction coordination complex that is the basis for converting CdCO3 to CdO. With SEM it was possible to perform the morphological studio of the films of CdCO3 Showing a pyramidal shape in each of the samples. The vibration bands in the FTIR spectrum, located at range ~ 3600 − 400 cm-1, corresponding to characteristic vibrations of the carbonate ((CO3)−2) ion, carboxylates, and OH ions were identified. The X-ray diffraction (XRD) technique was applied to investigate the structural and microstructural properties of polycrystalline thin films and the phase change from CdCO3 to CdO. The optical properties of all films such as Absorption, Transmittance, and Reflectance were analyzed, getting a GAP of 1.87–2.37 eV. And, nanostructured films were applied to photocatalysis with a low percentage of photocatalytic efficiency of 8 ~ 14% in 90 minutes.