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首页> 外文期刊>Journal of spectroscopy >Fabrication of Ag:TiO2Nanocomposite Thin Films by Sol-Gel Followed by Electron Beam Physical Vapour Deposition Technique
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Fabrication of Ag:TiO2Nanocomposite Thin Films by Sol-Gel Followed by Electron Beam Physical Vapour Deposition Technique

机译：溶胶-凝胶-电子束物理气相沉积技术制备Ag：TiO2纳米复合薄膜

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Ag:TiO2nanocomposite films have been synthesized by sol-gel method followed by electron beam physical vapour deposition. Targets for this deposition were prepared by a hydraulic press using a powder containing Ag and TiO2prepared by sol-gel technique. Microstructure, surface, and plasmonic properties of nanocomposite films were studied using glancing angle X-ray diffractometer, atomic force microscopy, field emission secondary electron microscopy, and UV-Vis spectroscopy. Microstructural study reveals that Ag nanoparticles are embedded in TiO2matrix consisting of mixed phases of anatase and rutile. Size estimation using Scherrer formula reveals that average crystallite size of Ag nanoparticles is 23 nm. Surface morphological studies indicate that deposited films are uniform and intact to the substrate and have very low value of root mean square roughness. Optical studies exhibit a surface plasmon resonance induced absorption band in visible region, which is the characteristic feature of Ag nanoparticles. The intensity of this absorption band is found to increase with the increase in deposition time. Multiple peaks observed in absorption band were explained using the concepts of extended Mie scattering. Preliminary experiments also suggested that these nanocomposite films exhibit promising photocatalytic properties, which can be used for water treatment.
机译：Ag：TiO2纳米复合薄膜是通过溶胶-凝胶法合成电子束进行物理气相沉积而成。通过水压机使用通过溶胶-凝胶技术制备的包含Ag和TiO 2的粉末通过水压机制备用于该沉积的靶。使用掠角X射线衍射仪，原子力显微镜，场发射二次电子显微镜和UV-Vis光谱研究了纳米复合膜的微观结构，表面和等离激元性质。微观结构研究表明，Ag纳米颗粒嵌入由锐钛矿和金红石混合相组成的TiO2基质中。使用Scherrer公式进行的尺寸估算表明，Ag纳米颗粒的平均微晶尺寸为23 nm。表面形态学研究表明，沉积的膜对基底均匀且完整，并且具有极低的均方根粗糙度值。光学研究在可见光区域显示出表面等离子体共振诱发的吸收带，这是Ag纳米颗粒的特征。发现该吸收带的强度随着沉积时间的增加而增加。使用扩展的米氏散射的概念解释了在吸收带中观察到的多个峰。初步实验还表明，这些纳米复合材料薄膜具有良好的光催化性能，可用于水处理。

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