微晶
硫化锌
锰
光致发光
分析化学(期刊)
硫化物
高分辨率透射电子显微镜
材料科学
傅里叶变换红外光谱
光谱学
透射电子显微镜
硫化铅
热分解
锌
化学
结晶学
化学工程
纳米技术
冶金
有机化学
物理
光电子学
色谱法
量子力学
量子点
工程类
作者
Zein K. Heiba,Mohamed Bakr Mohamed,Noura M. Farag,Sameh I. Ahmed
标识
DOI:10.1002/crat.202000201
摘要
Abstract Nano MnS and ZnS samples are prepared through a simple thermolysis procedure. The effect of synthesis temperature on the different phases formed and their percentages, and on the lattice parameters and crystallite size of MnS and ZnS is examined using Rietveld analysis for X‐ray diffraction patterns. The minimum synthesis temperature at which MnS can be formed by the present simple procedure is 250 °C, while ZnS can be prepared at a lower temperature of 200 °C. For manganese sulfide, traces of Mn 3 O 4 phase appear at 300 °C and increase with temperature, while ZnS resists oxidation until 500 °C; pure ZnO forms at 700 °C. The MnS and ZnS samples, obtained at all temperatures, are found to be biphasic; cubic and hexagonal. The nano nature of the samples and the particle morphology are investigated by high‐resolution transmission electron microscopy. Fourier‐transform infrared spectroscopy is applied to follow the characteristic vibration bands in both systems. The values of the different energy gaps depend on the crystallite size, phases’ percentages, and the preparation temperature. The photoluminescence intensity and the emitted colors from MnS and ZnS depend on the synthesis temperature.
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