Article (Scientific journals)
Highly dispersed iron xerogel catalysts for p-nitrophenol degradation by photo-Fenton effects
Mahy, Julien; Tasseroul, Ludivine; Zubiaur, Anthony et al.
2014In Microporous and Mesoporous Materials, 197, p. 164-173
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Keywords :
Sol-gel process; Cogelled xerogels; Iron oxide nanoparticles; Photo-Fenton effect; p-nitrophenol degradation
Abstract :
[en] Several iron xerogel catalysts were synthesized by hydrolysis and condensation of tetraethoxysilane (TEOS) and 3-(2-aminoethylamino)propyltrimethoxysilane (EDAS) which is able to form a chelate with iron ions. The EDAS/TEOS ratio strongly influences the texture of xerogel catalysts. The specific surface area and the micro- and mesoporous volume increase with this ratio. It seems that EDAS plays a nucleating agent role for silica particles and allows to anchor Fe-based moieties inside the silica network. Iron oxide nanoparticles of diameter 1-1.5 nm and Fe3+ ions result, encapsulated in silica particles with sizes of about 10-30 nm in diameter. The iron species was determined by Mössbauer spectroscopy and magnetometry measurements and only Fe3+ species were observed in xerogel catalysts. The Fenton and photo-Fenton effect of these catalysts were evaluated on the degradation of p-nitrophenol in aqueous media under different conditions. Results show that in the presence of H2O2, iron xerogel catalysts present a photo-Fenton effect, reaching 99 % of degradation after 24 h.
Disciplines :
Materials science & engineering
Chemical engineering
Author, co-author :
Mahy, Julien  ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Nanomatériaux et interfaces
Tasseroul, Ludivine ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Nanomatériaux et interfaces
Zubiaur, Anthony ;  Université de Liège - ULiège > Département de chimie appliquée > Département de chimie appliquée
Geens, Jérémy ;  Université de Liège - ULiège > Département de chimie appliquée > Département de chimie appliquée
Brisbois, Magali ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Herlitschke, Marcus;  Jülich Center for Neutron Science JCNS and Peter Grünberg Institut PGI, JARA-FIT, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
Hermann, Raphaël ;  Université de Liège - ULiège > Département de chimie (sciences) > Département de chimie (sciences)
Heinrichs, Benoît ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Nanomatériaux et interfaces
Lambert, Stéphanie  ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Nanomatériaux et interfaces
Language :
English
Title :
Highly dispersed iron xerogel catalysts for p-nitrophenol degradation by photo-Fenton effects
Publication date :
October 2014
Journal title :
Microporous and Mesoporous Materials
ISSN :
1387-1811
eISSN :
1873-3093
Publisher :
Elsevier Science
Volume :
197
Pages :
164-173
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 04 July 2014

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