Synthesis and Oxidizability Study on Mn₃O₄ Nanoparticles

Sphere-like Mn₃O₄ nanoparticles were prepared by a simple aqueous precipitation method at 30 °C for 1.5 h with PEG 6000 involved. The as-prepared Mn₃O₄ nanoparticles extended sphere-like structures with sizes of around 80 nm. The size and shape could be manipulated by changing the species of alkali. Introduction of PEG6000 in the experiments caused the inhibition of crystal growth. The oxidiability of as-prepared Mn₃O₄ nanoparticles was evaluated by degradation of rhodamine B (RhB). The pH value of the reaction system was major factors to be assessed in the degradation process. After 120 minutes’ reaction, the degradation efficiency can reach 61.3 %.