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海之帆金蟲(chóng) (著名寫手)
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[求助]
求助翻譯一段話 光催化 多謝多謝
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| 鐠摻雜TiO2光催化劑具有良好穩(wěn)定性,晶型以銳鈦礦為主,且晶粒粒徑比未摻雜的粒徑小,說(shuō)明Pr摻雜有效抑制了納米晶體的生長(zhǎng)。光催化降解表明,當(dāng)摻雜量為2.0%(mol%)時(shí),樣品的光催化活性最佳。Pr摻雜后的TiO2表面的H2O和羥基的數(shù)量有所增加,有益于TiO2光催化劑活性的提高。熒光光譜表明,2.0%Pr-TiO2的表面捕獲態(tài)比純TiO2低,并能夠抑制光生載流子的復(fù)合,從而提高TiO2的光催化活性。在光催化降解過(guò)程中,催化劑表面吸附的•OH對(duì)羅丹明B的降解起著最重要的作用。 |
捐助貴賓 (著名寫手)
| Pr doped TiO2 photocatalyst possesses high stability with anatase as the main crystal phase, and the particle size is smaller than the undoped one, indicating that the Pr doping effectively inhibits the nanocrystal growth. Performance of photocatalytic degradation shows that the highest photoactivity is achieved when the Pr content is 2.0%(mol%. Increased numbers of H2O and hydroxyls on TiO2 surface resulting from the Pr doping facilitates the improvement of the photoactivity. As is shown in the photoluminescence spectra, the surface capture state is lower than that of the unmodified TiO2 which can inhibit the recombination of the photogenerated carriers and result in a higher photocatalytic activity. In photocatalytic degradation of Rhodamine B, hydroxyl adsorbed on TiO2 surface plays an important role. |
捐助貴賓 (著名寫手)
金蟲(chóng) (著名寫手)
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