کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1527708 | 995393 | 2007 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Selective synthesis and visible-light photocatalytic activities of BiVO4 with different crystalline phases Selective synthesis and visible-light photocatalytic activities of BiVO4 with different crystalline phases](/preview/png/1527708.png)
Tetragonal and monoclinic bismuth vanadate (BiVO4) powders were selectively synthesized by aqueous processes. The characterizations of the as-prepared BiVO4 powders were carried out by X-ray diffraction, nitrogen adsorption, scanning electron microscopy and UV–vis diffuse reflectance spectroscopy. The photocatalytic activities of different BiVO4 samples were determined by degradation of methylene blue solution under visible-light irradiation (λ > 420 nm) and compared with that of TiO2 (Degussa P25). The band gaps of the as-prepared BiVO4 were determined from UV–vis diffuse reflectance spectra. It was found that monoclinic BiVO4 with a band gap of 2.34 eV showed higher photocatalytic activity than that of tetragonal BiVO4 with a band gap of 3.11 eV.
Journal: Materials Chemistry and Physics - Volume 103, Issue 1, 15 May 2007, Pages 162–167