Synthesis and characteristics of nano calcium oxide from duck eggshells by precipitation method

This research aims to synthesize and characteristics nano calcium oxide from duck eggshells by precipitation method. The eggshell powder was calcined with 1.000°C for 2 hours into calcium oxide. Calcium oxide solution 20 ml (5 mol/L) added with lactic acid solution 30 ml (8 mol/L) with ratio 1:1.5 (v/v) and mixed for 30 minutes at 50°C with speed of 500 rpm/minutes. The mixed solution was added with ethanol 50% up to 20 ml (v/v), dried in the oven at 105°C for 48 hours, mashed with blender, and then calcined with 1.000°C for 2 hours into nano calcium oxide. The characteristics of calcium oxide and nano calcium oxide were analyzed by x-ray diffraction, Fourier transform infrared, scanning electron microscopy, energy dispersive x-ray, and particle size analysis. The XRD and FTIR showed that CaO was formed from the two samples supported by EDX results with the highest chemical elements, namely Ca and O. Regular morphology with uniform crystal size was obtained in the precipitation sample. The PSA obtained calcined calcium oxide and nano calcium oxide resulted by precipitation of 13,229 nm and 262 nm, respectively.