Abstract
In this contribution, BiOI/BiOBr heterojunctions were prepared by a one-pot solvothermal method with the assistance of ionic liquids. The BiOI/BiOBr heterojunctions were characterized by Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD) and scanning electron microscope (SEM), high resolution transmission electron microscopy (HRTEM). The specific surface area of BiOI/BiOBr heterojunctions is higher than that of the bare BiOBr. The photocatalytic ability of the BiOI/BiOBr heterojunctions towards decontamination of rhodamine B (RhB) under simulated sunlight irradiation was assessed; the evaluation results reveal that BiOI/BiOBr heterojunctions display higher photocatalytic degradation ability toward abatement of RhB than the bare BiOBr. Due to the heterostructure effect between BiOI and BiOBr, the separation and transfer of photogenerated electrons and holes have been significantly accelerated, which remarkably improves the photocatalytic activity.
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