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TiO 2 ‐Modified Flower‐Like Bi 2 WO 6 Nanostructures with Enhanced UV‐Vis Photocatalytic Activity
Author(s) -
Zheng Y.,
Lv K. L.,
Li X. F.,
Deng K. J.,
Sun J.,
Chen L. Q.,
Cui L. Z.,
Du D. Y.
Publication year - 2011
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201100228
Subject(s) - photocatalysis , calcination , anatase , materials science , nanostructure , hydrothermal circulation , chemical engineering , adsorption , visible spectrum , nanotechnology , layer (electronics) , nuclear chemistry , catalysis , chemistry , organic chemistry , optoelectronics , engineering
Anatase TiO 2 ‐modified flower‐like Bi 2 WO 6 nanostructures were prepared by a simple hydrothermal reaction followed by layer‐by‐layer deposition and calcination. The photocatalytic activity was evaluated using Brilliant Red X3B, an anionic azo dye, as the target organic pollutant under UV‐Vis light irradiation. The experiment results showed that the photocatalytic activity of the hybrid increases first and then decreases with increasing loading amount of TiO 2 . The hybrid coated with four layers of TiO 2 (containing 20 wt‐% TiO 2 ) showed the highest photocatalytic activity, which is 10.45 and 3.20 times higher than that of pure Bi 2 WO 6 and TiO 2 , respectively. The improved photocatalytic performance of TiO 2 ‐modified Bi 2 WO 6 nanostructures could be ascribed to the improved light‐harvesting ability, efficient photo‐generated electron‐hole separation, and enhanced adsorption of the dye. This work may shed light on the design of complex architectures and the exploitation of their potential applications.