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首页> 外文期刊>Environmental Science & Technology >A New Route for Degradation of Volatile Organic Compounds under Visible Light: Using the Bifunctional Photocatalyst Pt/TiO_(2-x)N_x in H_2-O_2 Atmosphere
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A New Route for Degradation of Volatile Organic Compounds under Visible Light: Using the Bifunctional Photocatalyst Pt/TiO_(2-x)N_x in H_2-O_2 Atmosphere

机译：在可见光下降解挥发性有机化合物的新途径：在H_2-O_2气氛中使用双功能光催化剂Pt / TiO_（2-x）N_x

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The bifunctional photocatalyst Pt/TiO_(2-x)N_xhas been successfully prepared by wet impregnation. The properties of Ft/ TiO_(2-x)M_x have been investigated by diffuse reflectance spectra, X-ray diffraction, transmission electron microscopy. X-ray photoelectron spectroscopy, a photoluminescence technique with terephthalic acid, and electric field induced surface photovoltage spectra. The photocatalytic activity of the sample was evaluated by the decomposition of volatile organic pollutants (VOCs) in a H_2-O_2 atmosphere under visible light irradiation. The results demonstrated that nitrogen-doped and platinum-modified TiO_2 in a H2-O_2 atmosphere could enormously increase the quantum efficiency of the photocatalytic system with excellent photocatalytic activity and high catalytic stability. The increased quantum efficiency can be explained by enhanced separation efficiency of photogenerated electron-hole pairs, higher interface electron transfer rate, and an increased number of surface hydroxyl radicals in the photocatalytic process. A mechanism was proposed to elucidate the degradation of VOCs over ft/TiO_(2-x)N_x in a H_2-O_2 atmosphere under visible light irradiation.
机译：通过湿法浸渍成功地制备了双功能光催化剂Pt / TiO_（2-x）N_x。通过漫反射光谱，X射线衍射，透射电子显微镜研究了Ft / TiO_（2-x）M_x的性质。 X射线光电子能谱，对苯二甲酸的光致发光技术以及电场感应的表面光电压谱。通过在可见光照射下，在H_2-O_2气氛中分解挥发性有机污染物（VOC），评估了样品的光催化活性。结果表明，在H2-O_2气氛中掺氮和铂改性的TiO_2可以显着提高光催化体系的量子效率，具有优异的光催化活性和较高的催化稳定性。量子效率的提高可以通过光生电子-空穴对的分离效率提高，界面电子转移速率更高以及光催化过程中表面羟基自由基数量增加来解释。提出了一种机制，以阐明在可见光照射下，H_2-O_2气氛中ft / TiO_（2-x）N_x上VOCs的降解。

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