Ni^(2+)掺杂纤蛇纹石纳米管的制备与磁性研究  

Preparation and Magnetic Property of Ni-doped Chrysotile Nanotubes

作　　者：马国华[1,2] 彭同江[2] 吴卫东[1] 刘海峰[2] 李明[2] 

机构地区：[1]中国工程物理研究院激光聚变中心,四川绵阳621002 [2]西南科技大学,四川绵阳621010

出　　处：《材料工程》2011年第9期77-81,共5页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目(51002126)

摘　　要：通过水热法制备了Ni2+掺杂纤蛇纹石纳米管。采用X射线衍射(XRD)、扫描电子显微镜(SEM)、高分辨透射电子显微镜(HRTEM)、傅里叶变换红外光谱(FTIR)和磁性测试等手段研究了合成样品的形貌、结构以及磁性与掺杂量的关系。结果表明:合成纳米管样品的内、外径分别为6~7nm和30~40nm;随Ni2+掺杂量的增加,合成样品的晶胞参数b0值从0.9190nm增加到0.9261nm;掺杂后的样品具有室温铁磁性,在相同外磁场下,饱和磁化强度随着Ni2+掺杂量的增加从2.2×10-4A.m2.kg-1增加到4.7×10-4A.m2.kg-1,部分Ni以氧化镍的形式存在于纳米管样品的管内,并表现出顺磁性特征。Ni-doped chrysotile nanotubes were synthesized by hydrothermal method.The relations among morphology,structure,magnetic and Ni2＋ content were characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,high-resolution transmission electron microscopy（HRTEM）,Fourier transform infrared spectroscopy（FTIR） and magnetic measurement techniques.The results show that the outer and inner diameter of synthesized nanotubes are 30-40nm and 6-7nm.With an increase of Ni2＋ content,the cell-parameter（b0） of synthesized samples can be varied from 0.9190nm to 0.9261nm.The prepared Ni-doped samples have room-temperature ferromagnetic behaviors.With an increase of Ni2＋ content,the saturated magnetization of samples varies from 2.2×10-4 A·m2·kg-1 to 4.7×10-4A·m2·kg-1 under the same applied field.Partial Ni2＋ ions form noncrystalline nickel oxide in the synthesized nanotubes and the nickel oxide has paramagnetic behavior.

关 键 词：水热反应 纤蛇纹石纳米管 掺杂 铁磁性 

分 类 号：O611.4[理学—无机化学] TB321[理学—化学]