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논문 기본 정보

자료유형
학술저널
저자정보
Jinfeng Gong (Anhui University) Fanming Meng (Anhui University) Zhenghua Fan (Anhui University) Huijie Li (Anhui University)
저널정보
대한금속·재료학회 Electronic Materials Letters Electronic Materials Letters Vol.12 No.6
발행연도
2016.1
수록면
846 - 855 (10page)

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Monodisperse 3D lotus-like CeO2 microstructures have beensuccessfully synthesized via controlling the morphology ofCeCO3OH precursors under hydrothermal condition as wellas subsequent calcination. The reaction time wassystematically investigated. XRD, FT-IR, SEM, TEM, XPS,Raman scattering and Photoluminescence (PL) spectra wereemployed to characterize the samples. The lotus-like CeO2hierarchical structures with an average of 4-6 μm arecomposed of many nanoplates of 100-200 nm in thickness asthe petals stacking together to form open flowers and have a fluorite cubic structure. Based on the time-dependent morphologyevolution evidences, a nucleation-dissolution-recrystallization mechanism has been proposed to explain the transformation fromrod-like structures to lotus-like CeO2 hierarchical structures with the increase of reaction time. It is found that there are Ce3+ ionsand oxygen vacancies in surface of samples. The magnetic and photoluminescence measurements indicated that all CeO2samples exhibit excellent ferromagnetism and optical properties at room temperature, and while increasing the reaction time, theferromagnetism and optical properties increase more, which can be reasonably explained for the influences of the differentmorphology of the particles and the concentration of oxygen vacancies and Ce3+ ions.

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