A multifunctional nanospinel: structural, optical and magnetic evolution of Zn1-xNixAl2O4 system

IF 4.2 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of Sol-Gel Science and Technology Pub Date : 2026-05-26 DOI:10.1007/s10971-026-07182-4

Zein K. Heiba, Noura M. Farag, Asmaa M. Abozied, Hassan Elshimy, Mohamed Bakr Mohamed, Essam E. Ali, Ali Badawi

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Abstract

Zn_1−xNi_xAl₂O₄ (x = 0.0, 0.25, and 0.5) was synthesized via a solid-state reaction method. Structural parameters were refined using the Rietveld method, and the obtained cation distributions were confirmed by FTIR and Raman spectroscopy. Transmission electron microscopy (TEM) revealed homogeneous particle morphology consisting mainly of spheroidal shapes with occasional rectangular formations. Field emission scanning electron microscopy (FESEM) with energy-dispersive X-ray spectroscopy (EDS) showed that the elemental compositions deviated only slightly from the nominal values. The optical band gap of pristine ZnAl₂O₄ was determined to be 3.24 eV, which decreased to 1.37 eV and 1.34 eV upon Ni doping at x = 0.25 and x = 0.50, respectively. The refractive index (n) of ZnAl₂O₄ increased with Ni incorporation, showing a marginal rise with higher Ni content. The dielectric constant, optical conductivity, and nonlinear optical parameters were enhanced with increasing Ni doping. The effect of Ni doping on the photoluminescence properties of ZnAl₂O₄ was also investigated. The pristine ZnAl₂O₄ exhibited diamagnetic behavior, whereas the Ni-doped samples showed paramagnetic characteristics.

Graphical Abstract

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一种多功能纳米尖晶石：Zn1-xNixAl2O4体系的结构、光学和磁性演化

采用固相反应法制备了Zn1−xNixAl2O4 （x = 0.0, 0.25, 0.5）。采用Rietveld法对结构参数进行了细化，并用FTIR和拉曼光谱对阳离子分布进行了验证。透射电子显微镜（TEM）显示均匀的颗粒形态，主要由球体形状组成，偶尔有矩形形状。场发射扫描电子显微镜（FESEM）和能量色散x射线能谱（EDS）显示，元素组成与标称值只有轻微的偏差。原始ZnAl2O4的光学带隙为3.24 eV，在x = 0.25和x = 0.50掺杂Ni后分别降至1.37 eV和1.34 eV。ZnAl2O4的折射率(n)随Ni的掺入而增加，随Ni含量的增加而略有上升。随着Ni掺杂量的增加，介质常数、光学电导率和非线性光学参数均有所提高。研究了Ni掺杂对ZnAl2O4光致发光性能的影响。原始ZnAl2O4表现出抗磁性，而ni掺杂样品表现出顺磁性。此图像的替代文本可能是使用AI生成的。

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来源期刊

Journal of Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.