中文摘要：

采用溶胶–凝胶法制备了Co/Cr双掺的ZnxMg1–xGa2O4（x=0～0.9）纳米粉材料,应用X射线光电子能谱研究了材料微观结构中阳离子分布及其随材料组成和热处理温度的变化,并研究了材料的光学吸收和发光性能随材料组成的变化关系。结果表明：该纳米材料中阳离子分布呈无序状态,Zn^2＋,Mg^2＋和Ga^3＋离子分别占据尖晶石结构的四面体和八面体2种晶格位置。随着热处理温度的升高和材料中Zn含量的增加,材料的反转度降低。随材料中Zn含量的减少,发光峰位置发生红移。当x值从0增加到0.3时,Co/Cr：ZnxMg1–xGa2O4纳米粉在370 nm处吸收强度相对减弱,表明四配位的Cr^3＋所占比例减少。

英文摘要：

Co/Cr co-doping ZnxMg1–xGa2O4（x =0–0.9） nano-particles were prepared by a sol-gel method. The cation distribution in the material as a function of composition and annealing temperature was investigated by X-ray photoelectron spectroscopy. The optical absorption and emission properties of the materials with different compositions were also investigated. The results show that the distribution of cations in the nano-material is disordered, and Zn^2＋, Mg^2＋ and Ga^3＋ ions occupy both the tetrahedral and octahedral sites of spinel structure. The inversion degree of the material decreases with increasing temperature and Zn content. The emission spectra have a red shift when Zn content decreases. The intensity of the absorption peak at 370 nm of Co/Cr：ZnxMg1–xGa2O4 nano-material decreases when x value increases from 0 to 0.3, indicating that the fraction of tetrahedral Cr^3＋ decreases.