Authors: J. Ma, S. Zhang, W. Liu, Y. Zhao
Affilation: University of Shanghai for Sci& Tech., China
Pages: 555 - 558
Keywords: nanomaterial, Mn3O4, hydrothermal, MnO2, superparamagnetic
In the paper, we firstly show a facile hydrothermal route for synthesizing monodisperse Mn3O4 nanopolyhedrons directly used new-made amorphous MnO2 nanoparticle with its mother solution as precursors. The hydrothermal process was performed at 160 ºC for different time. It is first time to indicate that MnO2 can be successfully transferred to Mn3O4 at low-temperature compared to traditional solid state route. The hydrothermal procedures are clarified with the treatment time increasing, which includes the formation of MnOOH nanorods and Mn3O4 nanoparticles mixture stage and the transformation of monodisperse Mn3O4 polyhedron nanoparticles stage. The as-obtianed Mn3O4 polyhedron nanoparticles reveal excellent superparamagnetic character at room-temperature.