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Hierarchical WO 3 Hollow Shells: Dendrite, Sphere, Dumbbell, and Their Photocatalytic Properties
Author(s) -
Chen Di,
Ye Jinhua
Publication year - 2008
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200701468
Subject(s) - materials science , photocatalysis , calcination , dumbbell , diffuse reflectance infrared fourier transform , scanning electron microscope , chemical engineering , specific surface area , spheres , diffuse reflection , transmission electron microscopy , visible spectrum , irradiation , bet theory , diffraction , nanotechnology , optics , composite material , adsorption , optoelectronics , catalysis , organic chemistry , medicine , chemistry , nuclear physics , physics , astronomy , engineering , physical therapy
In this work, hierarchical WO 3 hollow shells: dendrites, spheres and dumbbells have been successfully synthesized by simply calcining the acid‐treated PbWO 4 and SrWO 4 as precursors at 500 °C for 2 h. These hollow structures were characterized using X‐ray diffraction, scanning and transmission electron microscopies, Brunauer–Emmet–Teller surface area and diffuse reflectance spectroscopy, respectively. Possible formation mechanisms for hollow WO 3 shells consisted of tiny nanoplatelets were investigated in detail. Comparing with commercial WO 3 particles, all the obtained hollow shells with larger BET surface areas showed enhanced photocatalytic activities for the degradation of organic contaminants under visible light irradiation.