尖晶石结构ZnAl_(2-x)Fe_(x)O_(4)纳米颗粒微观结构与光学性能  

Microstructure and optical properties of spinel ZnAl_(2-x)Fe_(x)O_(4) nanoparticles

作　　者：汪金满 张克诚 马强 王健 卢强 魏智强[2] WANG Jinman;ZHANG Kecheng;MAQiang;WANG Jian;LU Qiang;WEI Zhiqiang(Gansu fifth construction group company,Tianshui 741000,China;School of Science,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]甘肃省第五建设集团有限责任公司,甘肃天水741000 [2]兰州理工大学理学院,甘肃兰州730050

出　　处：《粉末冶金工业》2022年第2期40-46,共7页Powder Metallurgy Industry

基　　金：国家自然科学基金资助项目(51261015);甘肃省自然科学基金资助项目(1308RJZA238)。

摘　　要：采用水热法和热处理工艺成功制备了不同Fe含量的掺杂尖晶石结构ZnAl_(2-x)Fe_(x)O_(4)纳米颗粒(x=0、0.025、0.05和0.10),研究了Fe掺杂比例对样品微观结构和光学性能的影响。X射线衍射(XRD)表明ZnAl_(2-x)Fe_(x)O_(4)纳米颗粒具有立方尖晶石结构,随着掺杂浓度的增加,平均晶粒尺寸减小,晶格参数增大。场发射透射电子显微镜(FE-TEM)表明样品形貌呈规则球形颗粒,颗粒大小均匀。X射线光电子能谱(XPS)表明掺杂的Fe离子替代Al^(3+)进入ZnAl_(2)O_(4)晶格,主要占据ZnAl_(2-x)Fe_(x)O_(4)样品的八面体位置。紫外可见光谱(UV-vis)表明样品的带隙随着Fe离子浓度的增加而减小,并发生红移。光致发光光谱(PL)发现样品表现出猝灭现象。傅里叶红外光谱(FT-IR)表明Fe^(3+)取代Al^(3+)没有改变ZnAl_(2)O_(4)尖晶石的结构。CIE色度图显示所有样品均呈黄绿色区域发射。Because of its unique crystal structure and excellent physical and chemical properties,ZnAl_(2)O_(4) has a broad application prospect in magnetic storage devices,catalysts,high temperature ceramics,laser and fluorescent substrate materials,sensors and optoelectronic devices.The microstructure and optical properties of ZnAl_(2)O_(4) binary metal oxide were investigated by doping the transition metal Fe ions into the octahedral position.Fe-doped ZnAl_(2-x)Fe_(x)O_(4) nanoparticles(x=0,0.025,0.05 and 0.10)were synthesized by hydrothermal method and heat treatment.X-ray diffraction(XRD),field emission scanning electron microscopy(FE-SEM),energy dispersive X-ray spectroscopy(EDX),X-ray photoemission spectroscopy(XPS),UV-Visible spectrum(UV-Vis),photoluminescence(PL)and Fourier transform infrared spectroscopy(FT-IR)were used to study the microstructure of Fe doped samples and optical properties.XRD patterns show that the structures of all ZnAl_(2-x)Fe_(x)O_(4) samples are similar,and Fe doping into ZnAl_(2)O_(4) lattice does not change the structure of ZnAl_(2)O_(4) nanoparticles.The crystal plane of the sample is obtained by using the jade software parameters,spacing and grain size,with the increase of Fe doping concentration,crystal grain size decreases,Fe doping has a regulating effect on grain size.In order to prove that Fe^(3+) successfully replaced Al^(3+) as dopant into ZnAl_(2)O_(4) matrix without forming impurity enrichment phase,FE-SEM was used to scan the distribution of elements in ZnAl1.90Fe0.10O_(4) samples.The samples are mainly regular spherical,rela tively uniform particle size,with an average particle size of less than 50 nm.The chemical composition and elemental chemical states of ZnAl_(2-x)Fe_(x)O_(4) were studied by X-ray photoelectron spectroscopy.Ultraviolet-visible absorption spectra shows that doping samples have absorption in the visible area,moreover with the increase of doped with iron content in sample,the absorption peak intensity in the ultraviolet and visible light wavelength region incr

关 键 词：ZnAl_(2)O_(4) FE掺杂 微观结构 光学性能 

分 类 号：TB383.1[一般工业技术—材料科学与工程]