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在无模板和表面活性剂的条件下,以KMnO_4为锰源,N-甲基吡咯烷酮(NMP)和水为混合溶剂,通过简单的水热法成功地合成了MnOOH单晶纳米棒。通过调节H_2O/NMP的体积比、反应温度、反应时间等实验条件合成了长度达20μm,且横截面为方形的MnOOH纳米棒。用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、高分辨透射电镜(HRTEM)和傅里叶变换红外光谱(FTIR)对样品进行了表征。用Ostwald熟化理论初步讨论了MnOOH纳米棒的形成机理。在此基础上,通过煅烧MnOOH纳米棒获得了Mn_2O_3纳米棒,与MnOOH纳米棒相比,其形貌基本没有变化。
In the absence of template and surfactant, MnOOH single crystal nanorods were successfully synthesized by a simple hydrothermal method using KMnO 4 as a manganese source, N-methyl pyrrolidone (NMP) and water as a mixed solvent. The MnOOH nanorods with a length of 20μm and a square cross section were synthesized by adjusting the volume ratio of H_2O / NMP, reaction temperature and reaction time. The samples were characterized by XRD, SEM, TEM, HRTEM and Fourier transform infrared spectroscopy (FTIR). The formation mechanism of MnOOH nanorods was discussed preliminarily with Ostwald ripening theory. On this basis, the Mn 2 O 3 nanorods were obtained by calcining MnOOH nanorods. Compared with MnOOH nanorods, the morphologies of Mn 2 O 3 nanorods were almost unchanged.