Flowerlike Bi2O2(OH)NO3/BiOCl nanocomposite with enhance photodegradation activity under simulated sunlight irradiation

A unique flowerlike Bi2O2(OH)NO3/BiOCl nanocomposite was successfully synthesized and characterized by XRD, SEM, TEM, N2 adsorption–desorption and XPS. The Bi2O2(OH)NO3/BiOCl nanocomposites display improved photocatalytic activity than pure Bi2O2(OH)NO3 and BiOCl. Spectroscopic results and photoelectrochemical analysis revealed that the improved photocatalytic activity is mainly attributed to the enhanced photogenerated electron–hole separation in Bi2O2(OH)NO3/BiOCl heterostructure and synergistic effect between two component. Among them, 9% BON-BOC exhibits the best photodegradation activity of dye solution with 92% of degradation in 100 min. In addition, the photocatalytic mechanism were also investigated in detail.