Controlled Synthesis, Characterizations and Structural-Properties of Micro-Flowers, Pine-Cone, Core-Shell and Liver-Like Micro-Architecture of Crystalline ZnMn_2O_4

摘要

The conspicuous ZnMn_2O_4 micro-structures have been synthesized by hydrothermal method by using Mn_3O_4 and Zn powder as precursors. The micro-structures of the ZnMn_2O_4 could be tuned by changing the reaction time only in the reaction system. The final products have been characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis and the Raman spectroscopy. Room temperature Raman spectroscopy investigation indicates that the synthesized micro-structures have strong fundamental vibrational modes. The intensity of the vibrational modes varied with change in the reaction time in the synthesized products of ZnMn_2O_4. The mechanism of this peculiar Raman property was analyzed.