Effect of Synthetic Technology on the Properties of Co_2O_3 Powder

摘要

Ultrafine Co_2O_3 powder was prepared via hydrothermal synthesis. The effect of technology on the performance of the superfine Co_2O_3 powders was investigated, and the hydrothermal parameters in preparing Co_2O_3 were gradually improved. In addition, the morphology and grain size of the Co_2O_3 powder were analyzed by FESEM. Results show that reducing the salt-alkali molar ratio resulted in more uniform Co_2O_3 powder and smaller particles, with average particle size of approximately 40 nm. Reaction time displayed little effect on the Co_2O_3 powder, but the particle size decreased with the reaction time. The concentration of salt solution remarkably affected the morphology of the Co_2O_3 powder. Lower concentration resulted in smaller particle aggregation and particle size.