Kristl Matjaž, Gyergyek Sašo, Škapin Srečo D, Kristl Janja
Faculty of Chemistry and Chemical Engineering, University of Maribor, 2000 Maribor, Slovenia.
Synthesis of Materials Department K8, Jožef Stefan Institute, 1000 Ljubljana, Slovenia.
Nanomaterials (Basel). 2021 Jul 29;11(8):1959. doi: 10.3390/nano11081959.
The paper reports the synthesis of nickel tellurides via a mechanochemical method from elemental precursors. NiTe, NiTe, and NiTe were prepared by milling in stainless steel vials under nitrogen, using milling times from 1 h to 12 h. The products were characterized by powder X-ray diffraction (pXRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), dynamic light scattering (DLS), vibrating sample magnetometer (VSM), UV-VIS spectrometry, and thermal analysis (TGA and DSC). The products were obtained in the form of aggregates, several hundreds of nanometers in size, consisting of smaller nanosized crystallites. The magnetic measurements revealed a ferromagnetic behavior at room temperature. The band gap energies calculated using Tauc plots for NiTe, NiTe, and NiTe were 3.59, 3.94, and 3.70 eV, respectively. The mechanochemical process has proved to be a simple and successful method for the preparation of binary nickel tellurides, avoiding the use of solvents, toxic precursors, and energy-consuming reaction conditions.
该论文报道了通过机械化学方法由元素前驱体制备碲化镍的过程。通过在氮气气氛下于不锈钢小瓶中研磨1小时至12小时，制备了NiTe、NiTe₂和Ni₃Te₂。通过粉末X射线衍射（pXRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、能量色散X射线光谱（EDX）、动态光散射（DLS）、振动样品磁强计（VSM）、紫外可见光谱以及热分析（TGA和DSC）对产物进行了表征。产物以聚集体的形式获得，尺寸为几百纳米，由较小的纳米微晶组成。磁性测量表明在室温下具有铁磁行为。使用Tauc图计算得出的NiTe、NiTe₂和Ni₃Te₂的带隙能量分别为3.59、3.94和3.70电子伏特。机械化学过程已被证明是一种制备二元碲化镍的简单且成功的方法，避免了使用溶剂、有毒前驱体以及耗能的反应条件。
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