Magnetically recoverable FexOy-MWNT Fenton's catalysts that show enhanced activity at neutral pH

被引：33

作者：

Variava, Meherzad F. ^{[1
]}

Church, Tamara L. ^{[1
]}

Harris, Andrew T. ^{[1
]}

机构：

[1] Univ Sydney, Lab Sustainable Technol, Sch Chem & Biomol Engn, Sydney, NSW 2006, Australia

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2012年 / 123卷

基金：

澳大利亚研究理事会;

关键词：

MWNT; Fenton; Heterogeneous catalyst; FexOy; Polyol functionalization; Advanced Oxidation Processes; MULTIWALLED CARBON NANOTUBES; TEXTILE WASTE-WATER; DYE ORANGE-II; HYDROGEN-PEROXIDE; IRON-OXIDE; PHOTOELECTRON-SPECTROSCOPY; WET OXIDATION; DEGRADATION; NANOPARTICLES; ADSORPTION;

D O I：

10.1016/j.apcatb.2012.04.034

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Known supported catalysts for the Fenton degradation of organic contaminants must be used in acidified solutions, where they leach Fe and consequently lose activity. In this study. FexOy nanoparticles (average diameter = 3 nm) were immobilized onto multiwalled carbon nanotubes using a facile microwave-assisted polyol method to produce a Fenton catalyst that was active at neutral pH. Despite an Fe content of only 1.5 wt%, FexOy-MWNTs catalyzed the near-complete degradation of 50 mg L-1 of an organic dye contaminant in water at pH(0) = 7 in 30 min. At neutral pH, Fe leaching from the catalyst was minimal. Factors affecting the activity and stability of the catalyst were studied and a method was developed to regenerate the catalyst, which could be separated and reused with a small loss in activity. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.

引用

页码：200 / 207

页数：8

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