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The generation of hydroxyl radicals by hydrogen peroxide decomposition on F eOCl/SBA‐15 catalysts for phenol degradation
Author(s) -
Yang Xuejing,
Tian Pengfei,
Zhang Xiaoman,
Yu Xin,
Wu Ting,
Xu Jing,
Han Yifan
Publication year - 2015
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.14625
Subject(s) - chemistry , catalysis , decomposition , phenol , hydrogen peroxide , radical , mesoporous material , chemical decomposition , hydroxyl radical , degradation (telecommunications) , electron paramagnetic resonance , kinetics , inorganic chemistry , nuclear chemistry , organic chemistry , telecommunications , computer science , physics , nuclear magnetic resonance , quantum mechanics
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 2 O 2 decomposition, and the generation capacity was comparable to the conventional Fenton reagent (Fe 2+ +H 2 O 2 ). 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 2 O 2 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 2 O 2 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