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Bi 2 WO 6 Nano‐ and Microstructures: Shape Control and Associated Visible‐Light‐Driven Photocatalytic Activities
Author(s) -
Zhang Lisha,
Wang Wenzhong,
Zhou Lin,
Xu Haolan
Publication year - 2007
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200700043
Subject(s) - photocatalysis , microstructure , materials science , rhodamine b , nano , hydrothermal circulation , nanotechnology , chemical engineering , visible spectrum , absorption (acoustics) , hydrothermal synthesis , optoelectronics , composite material , catalysis , chemistry , organic chemistry , engineering
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.