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首页> 外文期刊>International Journal of Electrochemical Science >Electrochemical and Photocatalytic Properties of Ru-doped TiO2?Nanostructures for Degradation of Methyl Orange Dye
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Electrochemical and Photocatalytic Properties of Ru-doped TiO2?Nanostructures for Degradation of Methyl Orange Dye

机译：Ru掺杂TiO2的电化学和光催化性能纳米结构下降甲基橙染料

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This study was focused on chemical synthesis of the pure TiO2 nanorods and Ru-doped TiO2 nanorods and their applications as photocatalyst for photodegradation of the methyl orange (MO) dye under UV and visible irradiations. The morphology, crystallinity, optical, electrochemical and photocatalyst properties of prepared films were characterized by FESEM, XRD, UV-visible absorption, electrochemical impedance spectroscopy (EIS) and photodegradation analyses. The FESEM and XRD studies showed both of films were synthesized in nanorod shape and anatase crystal phase. The optical studies indicate that the optical band gap values were obtained 3.37?eV and 3.22?eV for nanostructured pure TiO2 and Ru-doped TiO2 films, respectively. EIS analysis indicates that Ru-doped TiO2 film exhibited lower recombination rate of photo-excited carriers through effective separation of the photogenerated electron-hole pairs. Photodegradation studies of MO show that the degradation rate significantly was improved by Ru doping and the complete removal of MO were obtained after 55 and 45 minutes under UV and sunlight irradiation, respectively. While, degradation efficiency of MO on pure TiO2 photocatalyst were achieved 57.0 % and 4.8 % after 60 minutes UV and sunlight irradiations, respectively. Therefore, the photodegradation rate of doped film was remarkably enhanced under both UV and sunlight irradiations. Moreover, photocatalytic activity was remarkably promoted under sunlight on doped photocatalyst because of narrowing optical band gaps.
机译：该研究专注于纯TiO2纳米棒和Ru掺杂TiO2纳米棒的化学合成及其作为光催化剂，以光催化剂在紫外线和可见辐射下的甲基橙（Mo）染料的光降解。通过FESEM，XRD，UV可见吸收，电化学阻抗光谱（EIS）和光降解分析表征制备薄膜的形态，结晶度，光学，电化学和光催化剂性能。 FeSEM和XRD研究表明两种薄膜在纳米棒形状和锐钛矿晶相中合成。光学研究表明光学带隙值得到3.37〜EV和3.22αε，分别用于纳米结构纯TiO2和Ru掺杂的TiO 2膜。 EIS分析表明，Ru掺杂的TiO 2膜通过有效分离光发化的电子孔对，表现出光激发器的重组率较低。 Mo的光降解研究表明，通过Ru掺杂改善了降解速率，分别在UV和阳光照射下55％至45分钟后得到的全部除去。虽然在60分钟和阳光照射的60分钟和阳光照射后，在纯TiO 2光催化剂上的Mo对纯TiO 2光催化剂的降解效率分别达到57.0％和4.8％。因此，在UV和阳光照射下，掺杂膜的光降解速率显着增强。此外，由于光学带空隙缩小，在掺杂光催化剂上显着促进了光催化活性。

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