Mn3O4的溶剂热法制备及晶粒生长动力学研究

Nanocrystalline Trimanganese tetroxide (Mn3O4) was synthesized by solvothermal reaction of MnO2 and C2H5OH. The dependence of the Mn3O4 nanoparticle size on synthesis temperature was investigated using X-ray diffraction (XRD) technique. The mechanism for the nanocrystallite growth was also studied. The results indicate that the prepared Mn3O4 has a nanocrystalline structure with XRD average crystal size varing from 54 to 70 nm depending on the synthesis temperature. The activation energy for the nanocrystallite growth was calculated to be 11.36 kJ·mol-1 according to the kinetic theory of nanocrystallite growth, indicating that Mn3O4 nanocrystallite grows primarily by means of an interfacial reaction during the solvothermal process.