The present study focused on the structural, morphological, optical and fluorescence properties of Ni_0.5−xMg_0.5Cu_xFe₂O₄ (x = 0.0, 0.1, 0.3 and 0.5) nanoparticles synthesized by using auto combustion technique. The structural formation of the ferrite nanoparticles were confirmed by FTIR spectroscopic study. From FTIR spectra of the synthesized ferrite nanoparticles, metal ions are situated in two different sub lattices i.e. tetrahedral (A-site) and octahedral (B-site) in ferrites. The surface morphology and grain size of Cu substituted Ni-Mg ferrite nanoparticles were estimated from the micrographs of atomic force microscopy (AFM); the maximum grain size 54.69 nm was obtained. Spectra of UV-Visible absorption of the synthesized ferrite nanoparticles were carried-out by using UV-Vis spectrophotometry; the maximum absorption was observed at 418 nm. The energy band gap of ferrite nanoparticles has been estimated using UV-Vis absorption spectra; the energy band gap 3.50 eV was obtained. From the fluorescence emission spectra of the synthesized ferrite nanoparticles, ferrite samples emit red colour in the region of 680 nm.

本研究的重点是 Ni _0.5-x Mg _0.5 Cu _x Fe ₂ O ₄的结构、形态、光学和荧光特性(x = 0.0, 0.1, 0.3 和 0.5) 纳米粒子通过使用自动燃烧技术合成。通过FTIR光谱研究证实了铁氧体纳米颗粒的结构形成。从合成的铁氧体纳米粒子的 FTIR 光谱来看，金属离子位于两种不同的亚晶格中，即铁氧体中的四面体（A 位）和八面体（B 位）。Cu取代的Ni-Mg铁氧体纳米颗粒的表面形貌和晶粒尺寸由原子力显微镜（AFM）的显微照片估计；获得的最大晶粒尺寸为 54.69 nm。采用紫外-可见分光光度法对合成的铁氧体纳米颗粒进行紫外-可见吸收光谱；在 418 nm 处观察到最大吸收。铁氧体纳米粒子的能带隙已使用紫外-可见吸收光谱进行估计；3. 能带隙 获得了 50 eV。从合成的铁氧体纳米粒子的荧光发射光谱来看，铁氧体样品在 680 nm 区域发出红色。