Synthesis and Broadband Spectra Photocatalytic Properties of Bi2O2(CO3)1−xSx

High efficiency photocatalyst Bi2O2(CO3)1−xSxwas synthesized conveniently with chemical bath precipitation using Bi2O2CO3as the precursor. The microstructures of the samples are systematically characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS) and UV-Vis spectroscopy; the optical and photocatalytic properties are carefully tested as well. The content ofS, which was tuned through the controlling of the precipitation process, was verified to have an intense effect over the photocatalytic properties. A nearly saturatedSratio and the best photocatalytic performance were observed in specimens with the mostScontent. Our study reveals that, with negligible influence of the morphology and crystal structure, Bi2O2(CO3)1−xSxpossessed a broadened optical absorption regionfromultraviolet to visible light, and enhanced photocatalytic activity in comparison to precursor Bi2O2CO3in photocatalytic degradation of Congo Red aqueous solution.Keywords:Bi2O2CO3;Bi2O2(CO3)1−xSx;broadband spectra;photocatalysis