Title: Photocatalytic and photophysical properties of a novel series of solid photocatalysts, BiTa1−Nb O4 (0⩽x⩽1)
Abstract: BiTa1−xNbxO4(0⩽x⩽1) solid photocatalysts were prepared by solid-state reaction and characterized by powder X-ray diffraction and Rietveld structure refinement. The structure of BiTa1−xNbxO4 (x=0.0 and 0.5) is triclinic. However, the structures of x=0.2, 0.8 and 1.0 are orthorhombic. The H2 evolution was obtained from an aqueous CH3OH/H2O solution and from pure H2O with BiTa1−xNbxO4(0⩽x⩽1) under UV irradiation. The orthorhombic photocatalysts exhibit much higher activity than that of triclinic photocatalysts. The orthorhombic photocatalyst at x=0.2 showed the highest activity. An UV–vis diffuse reflectance spectroscopy measurement revealed that the band gap of orthorhombic photocatalysts is more narrow than that of triclinic photocatalysts.
Publication Year: 2001
Publication Date: 2001-08-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 81
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