Preparation, characterization, and enhanced visible-light photocatalytic activity of AgI/Bi_2WO_6 composite

摘要

In this study, a series of AgI/Bi_2WO_6 heterojunction photocatalysts were synthesized with deposition-precipitation method. The photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS), UV-vis diffuse reflectance spectroscopy (DRS). The photocatalysts exhibited enhanced photocatalytic activity on the RhB dye degradation under visible-light irradiation. The 58.5% AgI/Bi_2WO_6 sample was observed to have the highest photocatalytic degradation efficiency. Based on the calculated energy band positions, the mechanism of enhanced photocatalytic activity was discussed.