69. Preparation of N-doped Bi2WO4 microspheres for Efficient Visible-Light Induced Photocatalysis
writer：Bolin Tang, Guohua Jiang*?, Xia Li, Zhen Wei, Xiaohong Wang, Tengteng Jiang, Wenxing Chen, Junmin Wan
keywords：Hydrothermal method, Photocatalysis, Microstructures and properties
source：期刊
specific source：Acta Metallurgica Sinica (English Letters), 2014, 27(1), 124-130.
Issue time：2014年
The N-doped 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 (XRD), scanning electron microscopy (SEM), specific surface area, photocurrent analysis and UV-vis diffuse reflectrance spectroscopy (DRS). 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 the holes are the main active species of N-doped Bi2WO6 products in aqueous solution under visible light irradiation, rather than 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.