Indonesia Conference Directory

This research aims to synthesize nano calcium oxide from duck eggshells by precipitation method. The duck eggshell soaked in hot water for 10 minutes, cleaned form egg membrane, dried in oven at 105oC for 12 hours and then mashed with sample mill. The eggshell powder was calcined with 1.000oC 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 50oC with speed of 500 rpm/minutes. The mixed solution was added with ethanol 50% up to 20 ml (v/v), dried in oven at 105oC for 48 hours, mashed with blender, and then calcined with 1.000oC 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.