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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.
The Ni2 + -doped, anatase TiO2 nanobelts with different content of transition metal ions were prepared by hydrothermal ion exchange method. X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) , High resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) spectroscopy and magnetic testing were used to characterize the samples.The results showed that after ion exchange, Ni2 + In addition, the results of magnetic test show that Ni-TiO2 samples prepared at room temperature have room-temperature ferromagnetism and hysteresis loop characteristics, and because TiO2 Ni2 + ions in nanoribbons have good dispersibility. Under the same external magnetic field, the magnetization of samples increases with the increase of Ni2 + content.