The particle size-dependent optical band gap and magnetic properties of Fe-doped CeO2 nanoparticles

被引：83

作者：

El-Hagary, M. ^{[1
]}

Shaaban, E. R. ^{[2
]}

Moustafa, S. H. ^{[1
]}

Gad, G. M. A. ^{[1
]}

机构：

[1] Helwan Univ, Phys Dept, Fac Sci, Cairo 11792, Egypt

[2] Al Azhar Univ, Phys Dept, Fac Sci, Assiut 71452, Egypt

来源：

SOLID STATE SCIENCES | 2019年 / 91卷

关键词：

Nanoparticles; Diluted magnetic semiconductors; Microstructure properties; Energy gap; Quantum confinement; THIN-FILMS; CERIA NANOPARTICLES; FERROMAGNETISM; SI(111);

D O I：

10.1016/j.solidstatesciences.2019.03.005

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Fe-doped CeO2 (0%-0.08%) nanoparticles have been synthesized by chemical precipitation method. The nanoparticles have been investigated using thermogravimetric analysis (TGA), X-ray diffraction (XRD), transmission electron microscope (TEM), UV-Vis spectrometer and Vibrating sample magnetometer (VSM) techniques. XRD data exhibited the cubic zincblende type structure for Fe-doped CeO2 nanoparticles. The size of nanoparticles was found to decrease from 20 nm (0%) to 14 nm (8%) with increasing Fe concentration which is confirmed by TEM micrographs. The optical absorption spectra of the nanoparticles show the blue-shift of the wavelength of absorption maximum from 550.2 nm to 336.4 nm with increasing Fe concentration owing to decreasing in particle size. The energy band gap was found to increase slightly with increasing the Fe doping level which was attributed to the decrease in the particle size with Fe content originated from quantum confinement effect. The doped Fe-doped CeO2 nanoparticles revealed room temperature ferromagnetism.

引用

页码：15 / 22

页数：8

共 58 条

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