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Phytochemical Mediated Sol–Gel Synthesis, Crystallographic Structure, Morphology and Optical Investigations on ZnO Nanoparticles
Journal of Cluster Science ( IF 2.8 ) Pub Date : 2020-09-23 , DOI: 10.1007/s10876-020-01891-8
Prathibha Vasudevan , Arun S. Prasad

Zinc oxide nanoparticles were synthesized through sol–gel technique using Azadirachta indica leaves extract. The formation of structure, crystallite parameters, size and morphology were studied through Fourier Transform Infrared spectroscopy, X-ray diffraction, Raman spectroscopy, Transmission Electron Microscopy (TEM) and Selected Area Electron Diffraction data records. X-ray diffraction peaks revealed the presence of hexagonal wurtzite structure for ZnO nanoparticles. The crystallite size and lattice strain of the prepared sample were respectively obtained through measuring the X-ray diffraction peaks broadening and Hall Williamson analysis using anisotropic and isotropic models. The estimated crystallite size using TEM, Scherrer formula and Hall Williamson models were found in well agreement with each other. The optical properties were investigated from the UV–Vis reflectance data and the photoluminescence spectrum recorded at room temperature. The chromaticity color coordinates obtained from the photoluminescence spectrum shows that the biosynthesized ZnO nanoparticles can be useful for white luminescence applications.



中文翻译:

ZnO纳米颗粒的植物化学介导的溶胶-凝胶合成,晶体结构,形态和光学研究

氧化锌纳米粒子通过溶胶-凝胶技术使用印度印za(Azadirachta indica)合成叶提取物。通过傅立叶变换红外光谱,X射线衍射,拉曼光谱,透射电子显微镜(TEM)和选定区域电子衍射数据记录,研究了结构,微晶参数,尺寸和形态的形成。X射线衍射峰揭示了ZnO纳米颗粒的六方纤锌矿结构的存在。通过使用各向异性和各向同性模型测量X射线衍射峰加宽和Hall Williamson分析,分别获得了所制备样品的微晶尺寸和晶格应变。发现使用TEM,Scherrer公式和Hall Williamson模型估算的微晶尺寸彼此非常吻合。从紫外可见反射数据和室温下记录的光致发光光谱研究了光学性质。从光致发光光谱获得的色度色坐标表明,生物合成的ZnO纳米粒子可用于白色发光应用。

更新日期:2020-09-23
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