Synthesis of nanosize manganese oxides from its ore using solvothermal method

Abstract

Nano-sized manganese oxide was successfully synthesized from local manganese ore using solvothermal method. The manganese ore were obtained from Jereweh District, Sumbawa, West of Nusa Tenggara, Indonesia. The aims of this research are to study the effects of temperature and time to the morphology, size and phase of manganese oxide obtained by solvothermal method. In the first step, we performed the extraction of manganese precursor from manganese ore. The method to extract the manganese precursor was hydrometallurgy. The second step, manganese precursor that obtained in the first step was used to synthesis manganese oxide using solvothermal method. NaOH was used as precipitating agent. The phase, morphologies and particle size of manganese oxides were examined by x-ray diffractometer and scanning electron microscopy.