Abstract
Bowknot-like CeO2 microstructures have been successfully synthesized by a CTAB (cetyltrimethyl ammonium bromide)-assisted hydrothermal method using Ce(NO3)3·6H2O as cerium source and urea as mineralizer. X-ray diffraction (XRD) inferred that the synthesized CeO2 microstructures exhibited a fluorite cubic structure. A scanning electron microscope (SEM) revealed that the CeO2 microstructures have a bowknot-like microstructure. X-ray photoelectron spectroscopy (XPS) and the Raman spectroscopy reflected the existence of the oxygen vacancies and Ce3+ ions in the bowknot-like CeO2 microstructures. Magnetization measurements exhibited room temperature ferromagnetism (RTFM) with a saturation magnetization (Ms) of 3.97×10−3emu/g and coercivity (Hc) of 200Oe, which is likely associated with Ce3+ ions and oxygen vacancies in the bowknot-like CeO2 samples.
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