Synthesis of TiO_2?xN_y/Ag-PbMoO₄ nanocomposites: An effective approach for photoinactivation of green tide under simulated solar light

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• 作者：Tae-Ho Kim^a ; Yong-Hyun Jo^a ; Gobinda Gyawali^a ; Rajesh Adhikari^a ; Tohru Sekino^b ; Soo-Wohn Lee^a ; ^{swlee@sunmoon.ac.kr}
• 关键词：TiO2&minus ; xNy ; Ag&ndash ; PbMoO4 ; Green tide ; Simulated solar light ; Photocatalyst
• 刊名：Materials Letters
• 出版年：2013
• 出版时间：15 June, 2013
• 年：2013
• 卷：101
• 期：Complete
• 页码：99-102
• 全文大小：680 K

文摘

The TiO_2?xN_y/Ag-PbMoO₄ nanocomposites were prepared by sonochemical method. The as-prepared powders were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and diffuse reflectance UV-vis spectroscopy (UV-vis-DRS). The results revealed that the band gap energy absorption edge of TiO_2?xN_y/Ag-PbMoO₄ nanocomposites red shifted as compared to TiO_2?xN_y and Ag-PbMoO₄. According to FE-SEM studies, Ag-PbMoO₄ gets to be decorated with evenly distributed TiO_2?xN_y nanoparticles. The photocatalytic activity of TiO_2?xN_y/Ag-PbMoO₄ nanocomposites for photoinactivation of green tide (Tetraselmis suecica) under simulated solar light was enhanced as compared with TiO_2?xN_y and Ag-PbMoO₄. The TiO_2?xN_y/Ag-PbMoO₄ nanocomposites showed the highest percentage (100 % ) of removing of Tetraselmis suecica after 25 min. The TiO_2?xN_y/Ag-PbMoO₄ nanocomposite may facilitate the charge transfer process more efficiently by inhibiting electron-hole recombination, which enhanced the photocatalytic activity.