Calcium Molybdate Octahedral Nanostructures, Hierarchical Self-assemblies Controllable Synthesis by Coprecipitation Method: Characterization and Optical Properties

چکیده مقاله

Calcium molybdate nanostructures have been successfully prepared via coprecipitation approach by utilizing Ca(Sal)2 (Sal = salicylidene) and ammonium heptamolybdate ((NH4)6Mo7O244H2O) as starting materials in water as solvent. The products were characterized by Fourier transform infrared (FT-IR) spectra, X-ray diffraction (XRD), energy dispersive X-ray microanalysis (EDX), photoluminescence (PL) spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The effects of temperature, reaction time, solvent, surfactant, calcium source and pH were considered to obtain optimum condition. It was established that morphology, particle size and phase of the final products could be extremely affected via these parameters. It revealed that utilizing of water as solvent and NH3 as the base, provided octahedral and hierarchical self-assemblies nanostructures, respectively