溶剂热法制备室温铁磁性Cr掺杂CdS纳米棒

Preparation of Cr-doped CdS nanorods with room temperature ferromagnetism via a solvothermal route

以硫粉(S)、氧化镉(CdO)和六水氯化铬(CrCl3.6H2O)为原料,用溶剂热法成功地合成了增强铁磁性能铬掺杂CdS纳米棒.X-射线衍射(XRD)测试表明Cr掺杂CdS纳米棒为纤锌矿结构.透射电镜(TEM)表征不同Cr掺杂CdS的形貌为纳米棒,纳米棒长为200～300nm,直径为50～70nm.电子能量散射谱(EDS)表明产物由Cr、Cd、S三种元素组成.振动样品磁强计(VSM)测试表明未掺杂的CdS为弱铁磁性,然而Cr掺杂CdS为强铁磁性,Cr掺杂量在x=0.0000到x=0.072 7范围内,饱和磁化强度随掺杂量的增加而增加,Cd1-xCrxS(x=0.072 7)纳米棒的饱和磁化强度为8.884(10-3 emu/g).

Cr-doped CdS nanorods with enhanced room temperature ferromagnetism have been successfully synthesized via solvothermal reaction. X-ray diffraction （XRD） measurements demonstrated that the Cr-doped CdS nanocrystals had a wurtzite structure hexagonal phase. Transmission electron microscopy （TEM） images revealed that the morphologies of CdS doped with different amounts of chromium consisted of nanorods. Cr-doped CdS nanorods produced a regular morphology with diameters of 50-70 nm and lengths of 200-300 nm. This product, composed of Cr, Zn,and S,was observed by an energy dispersive spectrometer （EDS）. A vibrating sample magnetometer （VSM） showed that the Cr-doped CdS nanorods exhibited strong ferromagnetism at room temperature,while the pure CdS nanorods exhibi- ted weak ferromagnetism. The saturation magnetization of the Cr-doped CdS nanorods in- creased with increasing Cr concentration over the range of x=0. 000 0 to x= 0. 072 7. The saturation magnetization of the Cdl xCrxS （x=0. 072 7） nanorods was 8. 884 （10-3emu/g）.