Synthesis of TiO_(2-x)N_y/Ag-PbMoO_4 nanocomposites: An effective approach for photoinactivation of green tide under simulated solar light

摘要

The TiO_(2-x)N_y/Ag-PbMoO_4 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-x)N_y/Ag-PbMoO_4 nanocomposites red shifted as compared to TiO_(2-x)N_y and Ag-PbMoO_4. According to FE-SEM studies, Ag-PbMoO_4 gets to be decorated with evenly distributed TiO_(2-x)N_y nanoparticles. The photocatalytic activity of TiO_(2-x)N_y/Ag-PbMoO_4 nanocomposites for photoinactivation of green tide (Tetraselmis suecica) under simulated solar light was enhanced as compared with TiO_(2-x)N_y and Ag-PbMoO_4. The TiO_(2-x)N_y/Ag-PbMoO_4 nanocomposites showed the highest percentage (100%) of removing of Tetraselmis suecica after 25 min. The TiO_(2-x)N_y/Ag-PbMoO_4 nanocomposite may facilitate the charge transfer process more efficiently by inhibiting electron-hole recombination, which enhanced the photocatalytic activity.