钴硫化物纳米颗粒的伽马射线辐照对光学性质的影响。
Gamma ray effects on optical properties of CoS nanoparticles.
机构信息
Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2012 Oct;96:796-800. doi: 10.1016/j.saa.2012.07.092. Epub 2012 Aug 3.
In this work, cobalt sulfide nanoparticles powder was synthesized in AlMCM-41 molecular sieve by using ion exchange method. The influence of gamma ray-radiation on the structural and optical properties of CoS/AlMCM-41 nanoparticles has been studied. Sample was irradiated by (60)Co and (137)Cs gamma ray source. The sample was characterized by X-ray diffraction (XRD), UV-Vis spectroscopy, scanning electron microscopy (SEM), FT-IR techniques and transmission electron microscopy (TEM). The XRD patterns show that nanoparticles size is increased after gamma radiation. The DRS results show that Co(2+) ions produced after gamma radiation, located in tetrahedral sites in AlMCM-41. The results indicate host materials have important role in decrease of radiation defects (RDs). The gamma ray creates free radicals and forms new bonds in CoSAlMCM-41 sample.
在这项工作中，通过离子交换法在 AlMCM-41 分子筛中合成了硫化钴纳米粒子粉末。研究了γ射线辐射对 CoS/AlMCM-41 纳米粒子结构和光学性质的影响。样品用（60）Co 和（137）Cs γ射线源辐照。样品的结构和形貌通过 X 射线衍射（XRD）、紫外-可见光谱（UV-Vis）、扫描电子显微镜（SEM）、傅里叶变换红外光谱（FT-IR）和透射电子显微镜（TEM）进行了表征。XRD 图谱表明，γ射线辐照后纳米粒子的尺寸增大。DRS 结果表明，γ射线辐照后产生的 Co(2+) 离子位于 AlMCM-41 的四面体位置。结果表明，宿主材料在减少辐射缺陷（RDs）方面起着重要作用。γ射线在 CoSAlMCM-41 样品中产生自由基并形成新键。
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