Authors: Jiang Yin Zhigang Zou Jinhua Ye
Publish Date: 2006/02/01
Volume: 41, Issue: 4, Pages: 1131-1135
Abstract
The photocatalyst BaCo1/3Nb2/3O3 has been synthesized at 750°C by using a solgel process and the surface area is 1970 m2/g While the surface area of the powder synthesized by using a solid state reaction process is 22 m2/g It was characterized by Xray diffraction scanning electron microscopySEM UVvis diffuse reflectance spectroscopy Raman scattering spectroscopy and the measurement of the photocatalytic activity in evolving H2 from CH3OH/H2O solution with the Pt cocatalyst under visible light irradiation From the SEM image BaCo1/3Nb2/3O3 powder calcined at 750°C is dispersive and the average particle size is about 30 nm Raman scattering spectrum at room temperature shows that due to the different ionic radius of the Co2+ and Nb5+ ions BaCo1/3Nb2/3O3 may has a distorted perovskite structure Under visible light irradiation λ 420 nm the formation rate of H2 evolution from CH3OH/H2O solution with the 05 wt Pt cocatalyst is about 181 μmol/h·gcat for the photocatalyst BaCo1/3Nb2/3O3 much higher than that of BaCo1/3Nb2/3O3 powder synthesized by the solid state reaction process
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