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首页> 外文期刊>Chemistry: A European journal >Controlled hydrothermal synthesis and structural characterization of a nickel selenide series
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Controlled hydrothermal synthesis and structural characterization of a nickel selenide series

机译：硒化镍系列的受控水热合成和结构表征

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摘要

A series of nickel selenides (NiSe2 microcrystals, Ni1-xSe and Ni3Se2 microspheres) has been successfully synthesized through a convenient, low-temperature hydrothermal method. A good nucleation and growth environment has been created by forming a uniform and transparent solution reaction system. The compositions (including the x value of Ni1-xSe), phase structures, as well as the morphologies of nickel selenides, can be controlled by adjusting the Ni/Se ratio of the raw materials, the pH, the reaction temperatures and times, and so forth. The newly produced Se microspheres in the system have been used as both reactant and in situ template to the Ni1-xSe microspheres. It is found that Ni1-xSe microspheres act as the intermediate precursor during the formation of Ni3Se2 microspheres. Under certain conditions, hexagonal NiSe microspheres can be converted into rhombohedral NiSe nanowires in solution. The formation mechanisms of a series of nickel selenides has been investigated in detail by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses. This work has provided a general, simple, and effective method to control the composition, phase structure, and morphology of metal selenides in aqueous solution, which will be important for inorganic synthesis methodology and further applications of selenides.
机译：通过便捷的低温水热法成功地合成了一系列硒化镍（NiSe2微晶，Ni1-xSe和Ni3Se2微球）。通过形成均匀且透明的溶液反应体系，已经创造了良好的成核和生长环境。组成（包括Ni1-xSe的x值），相结构以及硒化镍的形态可以通过调节原料的Ni / Se比，pH，反应温度和时间以及等等。系统中新产生的硒微球已用作Ni1-xSe微球的反应物和原位模板。发现Ni1-xSe微球在Ni3Se2微球形成期间充当中间前体。在某些条件下，六方NiSe微球可以在溶液中转化为菱形NiSe纳米线。通过X射线衍射（XRD）和扫描电子显微镜（SEM）分析，详细研究了一系列硒化镍的形成机理。这项工作为控制水溶液中金属硒化物的组成，相结构和形态提供了一种通用，简单而有效的方法，这对于无机合成方法和硒化物的进一步应用将是重要的。

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