Fabrication and characterization of nano TiO2 thin films at low temperature
Fabrication and characterization of nano TiO2 thin films at low temperature
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DOI：
10.1016/j.materresbull.2006.02.033
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发表时间：
2006-09
影响因子：
5.4
通讯作者：
L. Ge;Ming-xia Xu;Mingdi Sun;Haibo Fang
中科院分区：
文献类型：
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作者：
L. Ge;Ming-xia Xu;Mingdi Sun;Haibo Fang
以含有锐钛矿型二氧化钛晶体的回流溶胶为原料，采用溶胶-凝胶法在100℃低温下在玻片上成功制备了锐钛矿型二氧化钛薄膜，讨论了回流时间对溶胶结晶度、形貌和尺寸以及干燥后的二氧化钛薄膜颗粒的影响。用红外光谱(FT-IR)、X射线衍射仪(X射线衍射仪)、透射电子显微镜(TEM)、场发射扫描电子显微镜(FE-SEM)和紫外-可见吸收光谱(UV-Vis)对样品进行了表征。通过对水溶液中甲基橙的降解实验，考察了薄膜的光催化活性。结果表明，所制得的二氧化钛薄膜是透明的，在可见光区域的最大透光率超过80%。当焙烧温度高于300℃时，RS-6溶胶制备的二氧化钛薄膜的光催化活性最高，光照120min后对甲基橙的降解率可达99%，说明RS-6溶胶制备的二氧化钛薄膜具有较高的光催化活性。
Anatase TiO2thin films were successfully prepared on glass slide substrates via a sol–gel method from refluxed sol (RS) containing anatase TiO2crystals at low temperature of 100°C. The influences of various refluxing time on crystallinity, morphology and size of the RS sol and dried TiO2films particles were discussed. These samples were characterized by infrared absorption spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission-scanning electron microscopy (FE-SEM) and UV–vis absorption spectroscopy (UV–vis). The photocatalytic activities of the TiO2thin films were assessed by the degradation of methyl orange in aqueous solution. The results indicated that titania films thus obtained were transparent and their maximal light transmittance exceeded 80% under visible light region. The TiO2thin films prepared from RS-6 sol showed the highest photocatalytic activity, when the calcination temperature is higher than 300°C. The degradation of methyl orange of RS-6 thin films reached 99% after irradiated for 120min, the results suggested that the TiO2thin films prepared from RS sol exhibited high photoactivities.