Visible-light photocatalytic activity of graphene oxide-wrapped Bi2WO6 hierarchical microspheres

摘要

A facile approach of fabricating homogeneous graphene oxide (GO)-wrapped Bi2WO6 microspheres (GO/Bi2WO6 ) is developed. The transmission electron microscopy (TEM) results show that a heterojunction interface between GO and Bi2WO6 The UV-vis diffuse reflection spectra (DRS) reveal that the as-prepared GO/Bi2WO6 composites own more intensive absorption in the visible light range compared with pure Bi2WO6 . These characteristic structural and optical properties endow GO/Bi2WO6 composites with enhanced photocatalytic activity. The enhanced photocatalytic activity of the GO/Bi2WO6 is attributed predominantly to the synergetic effect between GO and Bi2WO6 , causing rapid generation and separation of photo-generated charge carriers. (C) 2015 Elsevier B.V. All rights reserved.