正八面体二硒化镍尺寸控制合成与表征

Shape-Controlled Synthesis and Characterization of Nickel Selenides Octahydra

摘要

本研究运用了混合溶剂热合成方法，选用氯化镍与硒粉作为主要反应物，同时在水合肼、乙二胺以及水这三种溶剂中进行反应，成功制备出了尺寸各异的NiSe₂正八面体微纳米粉体材料。为了对所制备的产物进行深入的了解和分析，我们采用了X射线粉末衍射（XRD）、扫描电镜（SEM）、透射电镜（TEM）、高分辨透射电镜（HRTEM）以及选区电子衍射（SAED）等多种表征技术。研究结果显示，NiSe₂正八面体的尺寸变化受到水合肼与乙二胺的体积比以及水合肼与水的体积比的调控。这一发现为我们进一步调控NiSe₂正八面体的尺寸提供了重要的理论依据。

Abstract

In this study, we used the thermal synthesis method of mixed solvent, selected nickel chloride and selenium powder as the main reactants, and reacted in hydrazine hydrate, ethylenediamine and water, and successfully prepared NiSe₂ regular octahedral micro and nano powder materials with different sizes. In order to understand and analyze the prepared products, X-ray powder diffraction (XRD), SEM (SEM), TEM (TEM), high resolution transmission electron microscope (HRTEM) and selective electron diffraction (SAED) were used. The results show that the size changes of NiSe₂ octaheon are regulated by the volume ratio of hydrazine to ethylenediamine and of hydrazine to water. This finding provides an important rationale for further regulating the size of NiSe₂ regular octahedra.

关键词

硒化镍 / 溶剂热法 / 形貌控制

Key words

nickel selenide / solvent thermal method / morphology control

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