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首页> 外文期刊>Journal of nano research >Structural, Optical and Magnetic Properties of Nanocrystalline Cobalt Doped TiO_2 Prepared by Sol-Gel Route
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Structural, Optical and Magnetic Properties of Nanocrystalline Cobalt Doped TiO_2 Prepared by Sol-Gel Route

机译：溶胶凝胶法制备纳米钴掺杂TiO_2的结构，光学和磁性

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摘要

Nanocrystalline Cobalt-doped TiO_2 was prepared by Sol-Gel technique, followed by freeze-drying treatment at -30℃ temperature for 12hrs. The obtained Gel was thermally treated at 200,400,600, 800℃. 1%, 2% and 4% Cobalt doped TiO_2 nano powder has been prepared X-ray Powder Diffraction (XRD), Scanning Electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX), was used to study its structural properties. The XRD pattern shows the coexistence of anatase phase and rutile phase. Thermal gravimetric analysis shows Cobalt concentration affects thermal decomposition. UV-Vis Spectroscopy, Photo luminescence (PL), was used to study its Optical properties. Optical Bandgap were calculated with the incorporation of different concentration of cobalt. UV-Visible spectroscopy show variation in band gap for the sample treated at different temperature for same concentration. All Cobalt doped TiO_2 nanostructures shows an appearance of Red shift relative to the bulk TiO_2. The determination of magnetic properties was also carried out by Vibrating Sample Magnetometer.
机译：采用Sol-Gel法制备了纳米钴掺杂TiO_2，然后在-30℃冷冻干燥12小时。将得到的凝胶在200,400,600，800℃下进行热处理。采用X射线粉末衍射（XRD），扫描电子显微镜（SEM），能量色散X射线能谱（EDX）的方法制备了1％，2％和4％钴掺杂的TiO_2纳米粉。 。 XRD图谱表明锐钛矿相和金红石相并存。热重分析表明钴浓度会影响热分解。紫外可见光谱，光致发光（PL），用于研究其光学性质。通过结合不同浓度的钴来计算光学带隙。紫外可见光谱显示在相同温度下以不同温度处理的样品的带隙变化。相对于整体TiO_2，所有钴掺杂的TiO_2纳米结构均表现出红移现象。磁性能的测定也通过振动样品磁强计进行。

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