八面体
扫描电子显微镜
热液循环
锰
结晶学
水热合成
化学
衍射
形态学(生物学)
粉末衍射
材料科学
晶体结构
矿物学
化学工程
地质学
光学
物理
冶金
古生物学
工程类
复合材料
作者
Xiaodi Liu,Jianmin Ma,Peng Peng,Wenjun Zheng
标识
DOI:10.1016/j.jcrysgro.2008.12.054
摘要
Cubic MnSe2 and octahedral α-MnSe microcrystals were successfully synthesized through a convenient hydrothermal method with N2H4·H2O as a reductant and SeO2 and MnCl2 as precursors. The crystalline structure, morphology, and chemical composition of the resulting samples were investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive spectrometer (EDS), and the results indicated that the cubic MnSe2 has an edge size ranging from 5 to 10 μm and the surfaces of these cubes have layer desquamation phenomenon; the α-MnSe has an average size of about 10 μm and the most of these microcrystals are in octahedral shapes. It was also found that the phases and morphologies of the manganese selenides can be controlled by changing the content of N2H4·H2O, reaction temperature, and reaction time. The potential formation mechanism of MnSe2 and α-MnSe was discussed.
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