Hydrothermal synthesis and characterization of nanocrystalline Zn-Mn spinel |
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| Authors: | Xiang-Dong Zhang Zhong-Shuai Wu Da Li |
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| Affiliation: | a Shenyang National Laboratory for Materials Science, Institute of Metal Research and International Center for Materials Physica, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
b Department of Chemistry, Liaoning University, Chongshan Road, Shenyang 110036, China |
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| Abstract: | Hydrothermal method had been used to successfully synthesize the nanocrystalline spinel zinc manganese oxide (ZnMn2O4) directly from Zn(CH3COO)2·2H2O, NaOH, Mn(NO3)2 and H2O2 at 170 °C for the reaction time of 48 h. The effects of the synthesis conditions, such as the Zn/Mn molar ratio, the reaction temperature, the reaction time, the zinc source and the concentrations of NaOH and H2O2, on the formation of the Zn-Mn spinel were investigated. The products were characterized by means of X-ray diffraction (XRD), inductively coupled plasma-atomic emission spectroscopy (ICP-AES). The results indicated that the compositions of the Zn-Mn spinel with the tetragonal structure were Zn1.14Mn1.86O4. Scanning electron microscope (SEM) and transmission electron microscopy (TEM) images showed that the products at 170 °C were with square-shaped nanocrystalline spinel with the particle size of about 20-50 nm. The thermal behaviors of the products were investigated by thermogravimetric analysis (TG). |
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| Keywords: | A. Nanostructures A. Non-crystalline materials A. Oxides B. Chemical synthesis C. X-ray diffraction |
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