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首页> 外文期刊>Results in Physics >Photocatalytic oxidation of ethanol using ultrasonic modified TiO 2; an in-situ diffuse reflectance infrared spectroscopy study
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Photocatalytic oxidation of ethanol using ultrasonic modified TiO 2; an in-situ diffuse reflectance infrared spectroscopy study

机译:超声改性TiO 2光催化氧化乙醇原位漫反射红外光谱研究

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Sonochemical synthesis was employed to make the intrinsic defects in TiO2(P25) which facilitates good photocatalytic properties. Thereby, the P25 samples are sonicated for various sonication time intervals with the constant pH and temperature. The ultrasonically modified TiO2nanoparticles were analyzed by various characterization techniques to obtain the information on the crystallinity, band gap, surface morphology, and electron-hole recombination phenomena. These modified TiO2samples were applied to the photocatalytic oxidation of ethanol and studied their oxidation mechanism by using in-situ FTIR (DRIFT) technique under UV–visible light irradiation. The DRIFT results revealed that the extension of the ultrasonication time yields good photocatalytic performance due to the oxygen deficiencies. Comparatively, the ultrasonically modified TiO2exhibited the high conversion rate for the ethanol oxidation than the pristine.
机译:声化学合成被用来制造TiO2(P25)的固有缺陷,从而促进良好的光催化性能。因此,在恒定的pH和温度下,在各种超声处理时间间隔内对P25样品进行超声处理。通过各种表征技术对超声改性的TiO2纳米颗粒进行了分析,以获得有关结晶度,带隙,表面形态和电子-空穴复合现象的信息。这些改性的TiO2样品被用于乙醇的光催化氧化,并使用原位FTIR(DRIFT)技术在紫外-可见光辐射下研究了它们的氧化机理。 DRIFT结果表明,由于氧缺乏,超声时间的延长产生了良好的光催化性能。相比之下,超声改性的TiO2的乙醇氧化转化率比原始的高。

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