Shim Jaesool, Venkata Reddy Ch, Sarma G V S S, Narayana Murthy P, Ravikumar R V S S N
Department of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, Republic of Korea.
Department of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, Republic of Korea.
Spectrochim Acta A Mol Biomol Spectrosc. 2015 May 5;142:279-85. doi: 10.1016/j.saa.2015.02.008. Epub 2015 Feb 12.
A simple co-precipitation method has been used for the synthesis of Co(2+) and Ni(2+)-doped zinc borate nanopowders. X-ray diffraction (XRD), Fourier transform infrared (FT-IR), UV/Vis absorption, Scanning electron microscope (SEM) with EDS and photoluminescence (PL) spectroscopies techniques has been employed for their characterization. Powder X-ray diffraction data reveals that the crystal structure belongs to monoclinic for both as-prepared samples. SEM images showed surface morphology of the prepared samples. Optical absorption spectra showed the characteristic bands of doped ions in octahedral site symmetry. From the optical absorption data crystal field and inter-electronic repulsion parameters are evaluated. The FT-IR spectra showed the characteristic vibrational bands related to ZnO, BO3 and BO4 molecules. Photoluminescence spectra exhibited the emission bands in ultraviolet and blue regions.
一种简单的共沉淀法已被用于合成钴（Ⅱ）和镍（Ⅱ）掺杂的硼酸锌纳米粉末。采用X射线衍射（XRD）、傅里叶变换红外（FT-IR）、紫外/可见吸收、带能谱仪的扫描电子显微镜（SEM）和光致发光（PL）光谱技术对其进行表征。粉末X射线衍射数据表明，所制备的两个样品的晶体结构均属于单斜晶系。SEM图像显示了所制备样品的表面形貌。光吸收光谱显示了八面体位置对称的掺杂离子的特征谱带。根据光吸收数据评估了晶体场和电子间排斥参数。FT-IR光谱显示了与ZnO、BO3和BO4分子相关的特征振动谱带。光致发光光谱在紫外和蓝色区域呈现出发射谱带。
