Acta Metallurgica Sinica (English Letters) >
Preparation of N-Doped Bi2WO6 Microspheres for Efficient Visible Light-Induced Photocatalysis
Received date: 2013-06-04
Revised date: 2013-09-07
Online published: 2014-03-11
The N-doped bismuth tungstate (Bi2WO6) photocatalysts with high visible light activity were prepared by the hydrothermal method using urea as a nitrogen source. The as-prepared N-doped Bi2WO6 samples were characterized by X-ray diffraction, scanning electron microscopy, specific surface area, photocurrent analysis, and UV–Vis diffuse reflectrance spectroscopy. The photocatalytic activity was evaluated by photocatalytic degradation of rhodamine B (RhB) solution under visible light irradiation. The photocatalytic mechanisms were analyzed by active species trapping experiments which revealed that the holes were the main active species of N-doped Bi2WO6 products in aqueous solution under visible light irradiation, rather than ·OH and O2?-. With the assistance of H2O2, the photocatalytic activity for degradation of RhB could be further improved because H2O2 reacted with conduction band electrons to generate more hydroxyl radicals.
Key words： Hydrothermal method; Photocatalysis; Microstructure and property
Bolin Tang , Guohua Jiang , Zhen Wei , Xia Li , Xiaohong Wang , Tengteng Jiang , Wenxing Chen , Junmin Wan . Preparation of N-Doped Bi2WO6 Microspheres for Efficient Visible Light-Induced Photocatalysis[J]. Acta Metallurgica Sinica (English Letters), 2014 , 27(1) : 124 -130 . DOI: 10.1007/s40195-013-0009-z
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