Morphology-Controlled Synthesis of CeO_2 Microstructures and Their Room Temperature Ferromagnetism

查看全文 作　　者：Fanming [1,2]Meng;Zhenghua [1]Fan;Cheng [1]Zhang;Youdi [1]Hu;Tao [1]Guan;Aixia [1]Li

机构地区：[1]School of Physics and Materials Science, Anhui University;[2]Key laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education

出　　处：《Journal of Materials Science & Technology》索引2017年第33卷第5期,共8页

基　　金：financially supported by the Anhui Provincial Natural Science Foundation (No. 1508085SME219) 摘　　要：Gear-shape CeO_2 microstructures have been synthesized via a facile hydrothermal method with Ce(NO_3)_3·6H_2O as the cerium source, NH_4HCO_3 as both the precipitator and the carbon source, and cetyltrimethyl ammonium bromide(CTAB) as the surfactant. X-ray diffraction(XRD) inferred that the synthesized CeO_2 microstructures exhibited a fluorite structure. The band gap(Eg) of CeO_2 samples is larger than that of bulk. X-ray photoelectron spectroscopy(XPS) showed that there are plenty of Ce^(3+) ions and oxygen vacancies at the surface of CeO_2 samples. All the synthesized CeO_2 samples exhibited the room temperature ferromagnetism, and the saturation magnetization increases with the increases of lattice parameter and Eg. The room temperature ferromagnetism mechanism of gear-shape CeO_2 is mainly attributed to the influence Ce^(3+) ions. 关键词：CERIA Controlled synthesis FERROMAGNETISM Hydrothermal method NANOMATERIALS

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Morphology-Controlled Synthesis of CeO_2 Microstructures and Their Room Temperature Ferromagnetism

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