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The generation of hydroxyl radicals by hydrogen peroxide decomposition on FeOCl/SBA-15 catalysts for phenol degradation.
- Source :
- AIChE Journal; Jan2015, Vol. 61 Issue 1, p166-176, 11p
- Publication Year :
- 2015
-
Abstract
- Iron oxychloride (FeOCl) supported on mesoporous silica (SBA-15), as a Fenton-like solid catalyst for phenol degradation, showed supreme activity for production of hydroxyl radical (HO·) by H<subscript>2</subscript>O<subscript>2</subscript> decomposition, and the generation capacity was comparable to the conventional Fenton reagent (Fe<superscript>2+</superscript>+H<subscript>2</subscript>O<subscript>2</subscript>). The structure of FeOCl was characterized with spectroscopies. The generation of HO· species during the reaction was detected using 5,5-dimethyl-1-pyrroline N-oxide trapped electron paramagnetic resonance. Furthermore, the kinetics in detail was driven for the creation and diffusion of HO· by H<subscript>2</subscript>O<subscript>2</subscript> decomposition over FeOCl, which follows a first-order rate through a two-step reaction. With the combination of the catalyst structure and kinetic parameters, the plausible mechanism for H<subscript>2</subscript>O<subscript>2</subscript> decomposition during the oxidative degradation of phenol was rationalized. As a Fenton-like solid catalyst, FeOCl/SBA-15 is a promising alternative for the removal of low-level organic contaminates from water. © 2014 American Institute of Chemical Engineers AIChE J, 61: 166-176, 2015 [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00011541
- Volume :
- 61
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- AIChE Journal
- Publication Type :
- Academic Journal
- Accession number :
- 100031707
- Full Text :
- https://doi.org/10.1002/aic.14625