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Removing lignin model pollutants with BiFeO 3 -g-C 3 N 4 compound as an efficient visible-light-heterogeneous Fenton-like catalyst.
- Source :
-
Journal of environmental sciences (China) [J Environ Sci (China)] 2016 Oct; Vol. 48, pp. 218-229. Date of Electronic Publication: 2016 Apr 18. - Publication Year :
- 2016
-
Abstract
- BiFeO <subscript>3</subscript> -g-C <subscript>3</subscript> N <subscript>4</subscript> nanoscaled composite was prepared with a hydrothermal method and evaluated as a highly efficient photo-Fenton like catalyst under visible light irradiation. The BiFeO <subscript>3</subscript> -g-C <subscript>3</subscript> N <subscript>4</subscript> composite exhibited much stronger adsorption ability to lignin model pollutant (guaiacol) than that of BiFeO <subscript>3</subscript> , which may be due to the higher specific surface area (BiFeO <subscript>3</subscript> -g-C <subscript>3</subscript> N <subscript>4</subscript> : 35.59m <superscript>2</superscript> /g>BiFeO <subscript>3</subscript> : 7.42m <superscript>2</superscript> /g) and the adsorption form of π-π stack between g-C <subscript>3</subscript> N <subscript>4</subscript> and guaiacol. The composite exhibited excellent visible light-Fenton like catalysis activity, being influenced by the solution pH value and the proportions of BiFeO <subscript>3</subscript> and g-C <subscript>3</subscript> N <subscript>4</subscript> nanosheets. Under optimal conditions with visible light irradiation, the BiFeO <subscript>3</subscript> -g-C <subscript>3</subscript> N <subscript>4</subscript> composite yielded fast degradation of guaiacol with an apparent rate constant of 0.0452min <superscript>-1</superscript> , which were 5.21 and 6.80 folds of that achieved by using BiFeO <subscript>3</subscript> and the mixture of BiFeO <subscript>3</subscript> and g-C <subscript>3</subscript> N <subscript>4</subscript> nanosheets, respectively. The significantly enhanced visible light-Fenton like catalytic properties of the BiFeO <subscript>3</subscript> -g-C <subscript>3</subscript> N <subscript>4</subscript> composite in comparison with that of BiFeO <subscript>3</subscript> was attributed to a large surface area, much increased adsorption capacity and the semiconductor coupling effect between BiFeO <subscript>3</subscript> and g-C <subscript>3</subscript> N <subscript>4</subscript> in the composite.<br /> (Copyright © 2016. Published by Elsevier B.V.)
Details
- Language :
- English
- ISSN :
- 1001-0742
- Volume :
- 48
- Database :
- MEDLINE
- Journal :
- Journal of environmental sciences (China)
- Publication Type :
- Academic Journal
- Accession number :
- 27745667
- Full Text :
- https://doi.org/10.1016/j.jes.2016.01.024