Bi-based semiconductors composites of BiVO4 quantum dots decorated Bi12TiO20 via in-suit growth with ultrasound for enhancing photocatalytic performance

摘要

In this work, two Bi-based semiconductors composites was synthesized through the BiVO4 quantum dots (BVO QDs) was grown on the Bi12TiO20 (BTO) via an in-suit growth with the ultrasonic method, which was more stability and evenly dispersed. As expected, the BVO-BTO composites exhibited increased visible-light-driven photocatalytic performance for photo-degradation due to the advantages of BVO QDs. Moreover, the possible mechanism of BVO-BTO composites was studied by trapping experiment, photocurrent, UV-vis and so on. The results demonstrated that the BVO QDs can widen the light response range to visible region and hasten the charge transfer and separation. Thus, the photocatalytic activity was enhanced through the BVO QDs decorated on BTO, which provided a new idea for designing Bi-based materials. (C) 2019 Elsevier B.V. All rights reserved.