铁磁性Cr^(3+)掺杂纤蛇纹石纳米管的制备与表征  

Preparation and characterization of ferromagnetic Cr-doped chrysotile nanotubes

作　　者：马国华[1] 彭同江[1] 李明[1] 刘海峰[1] 

机构地区：[1]西南科技大学分析测试中心,四川绵阳621010

出　　处：《功能材料》2009年第9期1471-1472,1476,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(40372030)

摘　　要：研究了在水热条件下,通过离子替代的方法制备Cr3+掺杂纤蛇纹石纳米管。采用X射线衍射、扫描电子显微镜、高分辨透射电子显微镜、红外光谱和磁性测试等手段对样品进行了表征。结果表明,掺杂Cr3+后的纤蛇纹石样品其晶胞参数b值增大,内外径分别为6～8nm和30～40nm,长度为50～300nm;掺杂样品中,Cr3+部分替代了Mg2+进入纤蛇纹石的八面体结构单元层中,使得其具有室温铁磁性和磁滞回线特性。Cr-doped Chrysotile nanotubes have been synthesized by ion-exchange with hydrothermal treatment and characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, transmission electron microscopy（TEM）,infrared spectroscopy（IR） and magnetic measurement techniques. The XRD analysis indicates that the cell-parameter （b0） of chrysotile nanotubes minish along with higher Cr^3＋ content in the synthesized samples. A partial Cr^3＋ cations replacement for Mg^2＋ has been revealed by IR studies. The TEM analysis indicates that the inner and outer diameters for the doped samples are 6-8nm and 30-40nm. The magnetic results demonstrate that the Cr-doped chrysotile nanotubes have room-temperature ferromagnetic behaviors.

关 键 词：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]