Synthesis and characterization of Sm^3＋-doped CeO2 powders

• Published in: Transactions of Nonferrous Metals Society of China Vol. 18; no. 4; pp. 897 - 903
• Main Author: 刘国聪 陈立妙 段学臣 梁达文
• Format: Journal Article
• Language: English
• Published: 2008
• Subjects: 二氧化铈; 晶体形态学; 荧光性; 钐掺杂
• ISSN: 1003-6326

Sm^3＋-doped Ce02 （denoted as Ce1-xSmxO2） powders with different morphologies were successfully synthesized via a precursor-growth-calcination approach, in which precursor was first synthesized by a hydrothermal method and Ce1-xSmxO2 powders were finally obtained through a calcination process. The products were characterized with X-ray diffractometry（XRD）, field emission scanning electron microscopy（FE-SEM） and fluorescence spectroscopy. The results reveal that the Ce1-xSmxO2 powders obtained by calcining the precursors prepared in the absence and presence of poly（vinyl pyrrolidone） （PVP） exhibit bundle-and sphere-like morphology, respectively. The possible growth process was proposed by preparing a series of intermediate morphologies during the shape evolution of CeO2 based on the SEM image observation. It is also found that the luminescence intensity of bundle-like Ce1-xSmxO2 is enhanced in comparison with that of sphere-like one due to its special morphology.