Kalaiezhily R K, Asvini V, Saravanan G, Ravichandran K
Department of Nuclear Physics, University of Madras, Chennai 600 025, India.
Dalton Trans. 2019 Aug 28;48(32):12228-12238. doi: 10.1039/c9dt01595g. Epub 2019 Jul 23.
Here, 1 mol% Dy,Ce co-doped ZnO nanoparticles were synthesized via a simple, cost-effective combustion method which could produce large-scale products. The structure and phase purity of synthesized nanoparticles were shown by X-ray diffraction, selected-area-electron-diffraction patterns and Raman spectroscopy to be a hexagonal wurtzite structure with no secondary peaks. Spherical morphology was shown by field emission scanning electron microscopy and high-resolution transmission electron microscopy. The presence of dopants with elemental composition was authenticated by energy dispersive spectroscopy and elemental mapping. Enhanced reflectance in the visible region for Ce-doped ZnO samples was noted by diffuse reflectance spectroscopy. An increase in the bandgap for doped samples was indicated by the Kubelka-Munk function. Significant visible luminescence was observed, which varied with different excitations. The room-temperature weak ferromagnetic behaviour of 2 mol% Ce-doped ZnO and distinct paramagnetic behaviour of 1 mol% Dy,Ce co-doped ZnO was detected using vibrating sample magnetometry.
在此，通过一种简单且经济高效的燃烧法合成了1摩尔%镝、铈共掺杂的氧化锌纳米颗粒，该方法能够大规模生产产品。通过X射线衍射、选区电子衍射图谱和拉曼光谱表明，合成的纳米颗粒的结构和相纯度为六方纤锌矿结构，无二次峰。场发射扫描电子显微镜和高分辨率透射电子显微镜显示出球形形态。通过能量色散光谱和元素映射验证了掺杂剂及其元素组成的存在。通过漫反射光谱法注意到铈掺杂的氧化锌样品在可见光区域的反射率增强。Kubelka-Munk函数表明掺杂样品的带隙增加。观察到显著的可见光发光，其随不同激发而变化。使用振动样品磁强计检测到2摩尔%铈掺杂的氧化锌的室温弱铁磁行为以及1摩尔%镝、铈共掺杂的氧化锌的明显顺磁行为。
