摘要:
采用一锅水热法在180?C下制备三维Eu3+-石墨烯自组装复合材料.通过X射线衍射、扫描电子显微镜、透射电子显微镜表征了合成样品的物相及形貌特征.结果表明：合成的样品具有多孔性结构,层与层之间堆叠成三维结构,并且结果显示产物中没有Eu3+的团聚体.经过拉曼光谱,傅里叶红外光谱分析表明, Eu3+通过含氧官能团与石墨烯复合.通过振动样品磁强计测定样品的磁滞回线,对其磁学性能进行研究,剥离顺磁信号后,测得相应的矫顽力Hc≈39.61 Oe (1 Oe=79.5775 A/m),饱和磁化强度Ms≈0.08 emu/g,发现该产物具有弱的铁磁性,与石墨烯相比, Eu3+的加入使得产物的铁磁性有较大提高.
关键词:
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三维石墨烯
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Eu3+
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水热法
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磁性
Abstract:
The three-dimensional self-assembly Eu3+-graphene composite materials are synthesized through a one-pot hydrothermal reaction under 180 ?C. The obtained samples are analyzed through powder X-ray diffraction, scanning electron microscope, and transmission electron microscopy. The results show that each sample has porous structure and no independent Eu3+agglomerates. Raman spectrum and Fourier transform infrared spectrum analyses indicate Eu3+is well complexed with graphene through oxygen-containing groups. The magnetic properties are measured using vibrating sample magnetometer. The magnetic hysteresis loop shows the corresponding coercivity Hc≈39.61 Oe (1 Oe=79.5775 A/m) and the magnetization saturation Ms≈0.08 emu/g that indicates that the sample presents weak ferromagnetism and good soft magnetic properties compared with graphene.
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