Abstract

This article deals with the structural and optical properties of zinc oxide and zinc sulfide nanoparticles synthesized by chemical precipitation method. X-ray diffraction study confirmed the wurtzite structure of zinc oxide and the cubic structure of zinc sulfide. The average crystallite size, the lattice constant, and unit cell volume were calculated from the x-ray diffraction study. The ultraviolet-visible absorption spectra and the Tauc’s plot were confirmed the energy gap of zinc sulfide and zinc oxide samples to be 5.1 eV and 3.73 eV, respectively. Fourier Transformation Infrared spectra confirmed the formation of zinc oxide and zinc sulfide through the appearance of peaks between 618 cm⁻¹- 439 cm⁻¹. The photoluminescence spectra confirmed the violet emission from ZnO and UV from ZnS. The transmission electron microscope study also confirmed the existence of particles in nanometer size. Composition analysis confirmed the existence of zinc, sulfur, and oxygen. The vibrating sample magnetometer results depict that the zinc sulfide and zinc oxides are ferromagnetic at room temperature. Electron paramagnetic resonance spectra also confirmed the ferromagnetic nature of zinc sulfide and zinc oxide samples.

抽象的

本文探讨了化学沉淀法合成的氧化锌和硫化锌纳米粒子的结构和光学性质。X射线衍射研究证实了氧化锌的纤锌矿结构和硫化锌的立方结构。从X射线衍射研究中计算出平均微晶尺寸，晶格常数和晶胞体积。紫外可见吸收光谱和Tauc曲线证实了硫化锌和氧化锌样品的能隙分别为5.1 eV和3.73 eV。傅立叶变换红外光谱证实通过峰618厘米之间的外观的氧化锌和硫化锌的形成^-1 - 439厘米^-1。光致发光光谱证实了来自ZnO的紫光发射和来自ZnS的UV发射。透射电子显微镜研究还证实存在纳米尺寸的颗粒。成分分析证实了锌，硫和氧的存在。振动样品磁力计的结果表明，硫化锌和氧化锌在室温下是铁磁性的。电子顺磁共振波谱也证实了硫化锌和氧化锌样品的铁磁性质。