Bi2WO6 nano- and microstructures: shape control and associated visible-light-driven photocatalytic activities.
The shape-controlled synthesis of nano- and microstructured materials has opened up new possibilities to improve their physical and chemical properties. In this work, new types of Bi(2)WO(6) with complex morphologies, namely, flowerlike, tyre- and helixlike, and platelike shapes, have been controllably synthesized by a facile hydrothermal process. The benefits of the present work also stem from the first report on the transformation of Bi(2)WO(6) from three-dimensional (3D) flowerlike superstructures to 2D platelike structures, and on the formation of tyre- and helixlike Bi(2)WO(6) superstructures. UV/Vis absorption spectra show that the optical properties of Bi(2)WO(6) samples are relevant to their size and shape. More importantly, the photocatalytic activities of Bi(2)WO(6) nano- and microstructures are strongly dependent on their shape, size, and structure for the degradation of Rhodamine B (RhB) under visible-light irradiation. The reasons for the differences in the photocatalytic activities of these Bi(2)WO(6) nano- and microstructures are further investigated.
Zhang
Lisha
L
State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, PR China.
Wang
Wenzhong
W
Zhou
Lin
L
Xu
Haolan
H
D001729:Bismuth / Q000737:chemistry* / Q000528:radiation effects; D002384:Catalysis; D003460:Crystallization / Q000379:methods*; D008027:Light; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010087:Oxides / Q000737:chemistry* / Q000528:radiation effects; D010316:Particle Size; D010777:Photochemistry / Q000379:methods*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014414:Tungsten / Q000737:chemistry* / Q000528:radiation effects
D046911:Macromolecular Substances; D010087:Oxides; C009495:titanium dioxide; C511604:tungsten oxide; D014025:Titanium; D001729:Bismuth; D014414:Tungsten