Grape-Like Bi 2 WO 6 /CeO 2 Hierarchical Microspheres: A Superior Visible-Light-Driven Photoelectric Efficiency with Magnetic Recycled Characteristic

Abstract Novel magnetic Bi 2 WO 6 /CeO 2 hierarchical micro-spheres with grape-appearance morphology are effectively fabricated using a dependable and efficient method. The multi-functional compound microspheres are comprised of a magnetized core Fe 3 O 4 @SiO 2 , with an external shall layer of Bi 2 WO 6 /CeO 2 heterostructure. The photoelectric performances of the samples are analyzed using photo-degradation of rhodamine B (RhB), surface photocurrent, and electrochemical impedance spectroscopy in visible light radioactivity. It is revealed that the Fe 3 O 4 @SiO 2 @Bi 2 WO 6 /CeO 2 (FSBC) compound microsphere display greater performance of photocatalysis with the rate of reaction of 0.0721 min −1 , which is 1.44-fold and 38.3-fold stronger than that of the Fe 3 O 4 @SiO 2 @Bi 2 WO 6 (FSB) composite and the CeO 2 nanoparticle, correspondingly. Moreover, the FSBC composite microspheres also display outstanding magnetic recoverability.