期刊
APPLIED CATALYSIS A-GENERAL
卷 350, 期 1, 页码 111-117出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2008.08.003
关键词
BiVO4; Photocatalytic O-2 evolution; Sacrificial reagent; Photocatalyst
资金
- National 863 Foundation [2006AA03Z344]
- Natural Science Foundation of China [20573078]
- Program for New Century Excellent Talents in University, China [NCET-07-0637]
Monoclinic BiVO4 nanoparticles were prepared through a homogeneous co-precipitation process. The products calcined at different temperatures were characterized by X-ray diffraction, transmission electron microscopy and UV-vis diffused reflectance spectroscopy. The photocatalytic O-2 evolution efficiencies over the BiVO4 nanoparticles under visible-light (lambda > 420 nm) irradiation were also investigated comparatively by using AgNO3 and Fe(NO3)(3) as sacrificial reagents. Experimental results indicate that AgNO3 is a more effective sacrificial reagent for the photocatalytic O-2 evolution over BiVO4 than Fe(NO3)(3) due to the efficient separation of the photogenerated electron-hole pairs at the Ag/BiVO4 interfaces, but the BiVO4/Fe(NO3)(3) system is more promising in the aspect of practical applications due to its more steady photoactivity and more convenient reactivation of the photocatalyst. (C) 2008 Elsevier B.V. All rights reserved.
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