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Efficient removal of organic contaminants by a visible light driven photocatalyst Sr6Bi2O9
- Source :
-
Chemical Engineering Journal . Aug2010, Vol. 162 Issue 1, p171-177. 7p. - Publication Year :
- 2010
-
Abstract
- Abstract: Sr6Bi2O9 powders were synthesized by a sol–gel method using Bi(NO3)3·5H2O and Sr(NO3)2 as the starting materials and were characterized by X-ray diffraction (XRD), UV–vis diffuse reflectance spectrum (UV–vis DRS), Fourier transform infrared (FT-IR) spectrum and Raman spectrum. The as-prepared Sr6Bi2O9 powders showed an efficient photocatalytic activity in the decomposition of 4BS dye (a widely used azo dye) and 4-nitrophenol (4-NP, a priority pollutant) under visible light irradiation (λ >400nm). TA-PL analysis reveals that HOthe dominant photooxidant. The radical scavengers experiments indicated that the main active species was O2 − in the photocatalytic degradation of dye under visible irradiation. A possible photodegradation mechanism of organic pollutants by the visible light driven Sr6Bi2O9 was discussed. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 13858947
- Volume :
- 162
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Journal
- Publication Type :
- Academic Journal
- Accession number :
- 52210295
- Full Text :
- https://doi.org/10.1016/j.cej.2010.05.024