物理化学学报 >> 2008, Vol. 24 >> Issue (04): 607-611.doi: 10.1016/S1872-1508(08)60027-3

研究论文 上一篇    下一篇

室温铁磁性Ni2+掺杂TiO2纳米带的制备与表征

张宏晔; 嵇天浩; 李玲龙; 齐兴义; 刘奕帆; 蔡建旺; 杜海燕; 孙家跃   

  1. 北京航空航天大学材料科学与工程学院, 北京 100083; 中国科学院物理研究所磁学国家重点实验室, 北京 100080; 北京工商大学化学与环境工程学院, 北京 100037
  • 收稿日期:2007-10-08 修回日期:2007-12-10 发布日期:2008-04-07
  • 通讯作者: 嵇天浩 E-mail:tianji@buaa.edu.cn

Preparation and Characterization of Room-temperature Ferromagnetic Ni-doped TiO2 Nanobelts

ZHANG Hong-Ye; JI Tian-Hao; LI Ling-Long; QI Xing-Yi; LIU Yi-Fan; CAI Jian-Wang; DU Hai-Yan; SUN Jia-Yue   

  1. School of Materials Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, P. R. China; State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P. R. China; College of Chemical and Environmental Engineering, Beijing Technology and Business University, Beijing 100037, P. R. China
  • Received:2007-10-08 Revised:2007-12-10 Published:2008-04-07
  • Contact: JI Tian-Hao E-mail:tianji@buaa.edu.cn

摘要: 通过水热离子交换方法, 制得不同含量的过渡金属离子Ni2+掺杂的、锐钛矿型的TiO2纳米带. 使用X射线衍射(XRD), 扫描电子显微镜(SEM), 透射电子显微镜(TEM), 高分辨透射电子显微镜(HRTEM), X射线光电子能谱(XPS), 傅立叶变换红外(FTIR)光谱和磁性测试等手段对样品进行了详尽的表征. 结果表明, 经过离子交换, Ni2+离子进入到了TiO2纳米带的晶格中, 其中并没有形成金属Ni团簇或纳米颗粒. 此外, 磁性测试的结果表明, 实验制备的Ni-TiO2样品具有室温铁磁性和磁滞回线特性, 并且, 由于TiO2纳米带中Ni2+离子有较好的分散性, 在相同的外磁场条件下, 样品的磁化强度随着掺杂Ni2+含量的增加而增大.

关键词: 稀磁半导体, 纳米带, Ni-掺杂氧化钛, 室温铁磁性

Abstract: Ni-doped anatase TiO2 nanobelts (NBs) with different Ni2+ contents were simply prepared by combining ion-exchange with hydrothermal treatment. They were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR), and magnetic measurement techniques. The results showed that Ni2+ cations doped into the TiO2 lattice and no metallic nickel clusters or nanoparticles could be found. The magnetic results demonstrated that the prepared Ni-doped TiO2 samples had complex magnetic mechanism including room-temperature ferromagnetic and paramagnetic behaviors, and with the increase of Ni2+ content, the magnetization also increased under the same applied field owing to uniform distribution of Ni2+ ions in TiO2 nanobelts.

Key words: Diluted magnetic semiconductor, Nanobelts, Ni-doped TiO2, Room-temperature ferromagnetic

MSC2000: 

  • O648