Hydrothermal synthesis and metal ions doping effects of single-crystal Mn₃O₄

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• 作者：Lili Kuang ; Ruiting Dong ; Zhanyang Zhang ; Liang Feng ; Fan Wang ; Yanxuan Wen
• 关键词：A. Oxides ; B. Chemical synthesis ; B. Crystal growth ; D. Optical properties
• 刊名：Materials Research Bulletin
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：48
• 期：9
• 页码：3122-3128
• 全文大小：2120 K

文摘

Synthesis of undoped and transition metal ion doped Mn₃O₄ microcrystals were achieved through a simple hydrothermal route. The morphologies and structures of the obtained products were characterized using X-ray diffraction, X-ray photoemission spectroscopy and scanning electron microscopy. Results revealed that the low volume percentage of ethanol in the precursor solution limited formation of Mn²⁺, while the introduction of doping ions into the precursor solution caused a direct synthesis of single phase Mn₃O₄ crystals. For Cu and Ni doping ions, the spontaneous valence changes during the doping process were taken place. The possible doping mechanisms for the formation of single-phase Mn₃O₄ were discussed briefly. UV-vis spectroscopic studies showed an apparent change in the energy bandgap of Mn₃O₄ with the metal doping.