Ferromagnetism of Co-Doped Titanate and Anatase Nanorods Before and After Lithium Intercalation
Ferromagnetism of Co-Doped Titanate and Anatase Nanorods Before and After Lithium Intercalation
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DOI：
10.1021/jp077461s
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发表时间：
2008-03
影响因子：
3.7
通讯作者：
Xingzhu Wang;Xueping Gao;Gaoran Li;T. Yan;Huaiyong Zhu
中科院分区：
文献类型：
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作者：
Xingzhu Wang;Xueping Gao;Gaoran Li;T. Yan;Huaiyong Zhu
采用一步水热法合成了共掺杂钛酸盐纳米棒。在氩气气氛中在700 °C下煅烧钛酸盐纳米棒2小时，得到Co掺杂的TiO 2（TiO 2）纳米棒。通过透射电子显微镜（TEM）测量，煅烧后的纳米棒是直的，长度超过2 μm，直径在80 ~ 120 nm之间。通过能量色散X射线谱（EDS）和电感耦合等离子体（ICP）证实了钴元素在钛酸盐纳米棒束中的存在。所制备的Co掺杂钛酸盐和二氧化钛纳米棒在300 K下具有铁磁性。结构和磁性分析表明，Co离子嵌入纳米棒层中，铁磁响应可归因于纳米棒的固有性质。采用恒电流法对制备的钛酸盐纳米棒和煅烧后的钛酸盐纳米棒进行了电化学嵌锂。结果表明，嵌锂对材料的力学性能有不同程度的影响。
Co-doped titanate nanorods are synthesized via a one-step hydrothermal reaction. Calcining the titanate nanorods at 700 °C for 2 h in an argon atmosphere yields Co-doped anatase (TiO2) nanorods. The calcined nanorods are straight, with lengths over 2 μm and diameters between 80 and 120 nm as measured by transmission electron microscopy (TEM). The presence of the cobalt element in a bundle of titanate nanorods is confirmed by energy dispersive X-ray spectrum (EDS) and inductively coupled plasma (ICP). The obtained Co-doped titanate and titania nanorods exhibit ferromagnetism at 300 K. Structural and magnetic analyses reveal that the Co ions intercalated into the layers of nanorods and the ferromagnetic response could be attributed to the intrinsic properties of the nanorods. The electrochemical lithium intercalation of the as-prepared titanate nanorods and calcined anatase nanorods was conducted by a galvanostatic method. The results suggest that the lithium intercalation has a different influence on the m...