Preparation and Characterization of Room-temperature Ferromagnetic Ni-doped TiO2 Nanobelts |
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| Authors: | Hongye Zhang Tianhao Ji Linglong Li Xingyi Qi Yifan Liu Jianwang Cai Haiyan Du Jiayue Sun |
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| Institution: | aSchool of Materials Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, P. R. China;bState Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P. R. China;cCollege of Chemical and Environmental Engineering, Beijing Technology and Business University, Beijing 100037, P. R. China |
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| 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. |
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| Keywords: | Diluted magnetic semiconductor Nanobelts Ni-doped TiO2 Room-temperature ferromagnetic |
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