Lu Wangwei, He Kay, Zhao Gaoling, Song Bin, Zhou Jing, Dong Weixia, Han Gaorong
State Key Laboratory of Silicon Materials & School of Materials Science and Engineering, Zhejiang University Hangzhou 310027 P. R. China
State Key Laboratory of Silicon Materials & Department of Physics, Zhejiang University Hangzhou 310027 P. R. China.
RSC Adv. 2019 Jul 23;9(40):22772-22778. doi: 10.1039/c9ra03893k.
A top-down synthetic method was developed for the fabrication of sponge-like MnO composed of MnO nanocrystals by decomposition of manganese formate at 200 °C. The samples were characterized in terms of their structural and morphological properties by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Brunauer-Emmett-Teller (BET) studies. TEM and SEM images showed that the morphology of sponge-like MnO structures was mostly retained from the morphology of the manganese formate precursor, which was controlled by the solvothermal process. Large sponge-like MnO structures exhibiting crystallographic symmetry were prepared under solvothermal treatment for a long time. The XRD pattern showed that the MnO exhibit a tetragonal hausmannite structure. The results of N adsorption analysis indicated that the sponge-like MnO nanostructures possess high surface area. The possible formation mechanism of MnO nanostructures has been discussed.
通过在 200 °C 下分解甲酸锰，开发了一种自上而下的合成方法来制备由 MnO 纳米晶体组成的海绵状 MnO。通过 X 射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和 Brunauer-Emmett-Teller（BET）研究对样品的结构和形态特性进行了表征。TEM 和 SEM 图像表明，海绵状 MnO 结构的形态大多保留了甲酸锰前驱体的形态，该形态由溶剂热过程控制。在长时间的溶剂热处理下制备出了具有晶体对称性的大型海绵状 MnO 结构。XRD 图谱表明 MnO 呈现四方铁锰矿结构。N 吸附分析结果表明，海绵状 MnO 纳米结构具有高比表面积。还讨论了 MnO 纳米结构可能的形成机制。
