Highly dispersed iron xerogel catalysts for p-nitrophenol degradation by photo-Fenton effects

Julien G. Mahy; Ludivine Tasseroul; Anthony Zubiaur; Jérémy Geens; Magali Brisbois; Marcus Herlitschke; Raphaël Hermann; Benoît Heinrichs; Stéphanie D. Lambert

doi:10.1016/j.micromeso.2014.06.009

Highly dispersed iron xerogel catalysts for p-nitrophenol degradation by photo-Fenton effects

Julien G. Mahy, Ludivine Tasseroul, Anthony Zubiaur, Jérémy Geens, Magali Brisbois, Marcus Herlitschke, Raphaël Hermann, Benoît Heinrichs, Stéphanie D. Lambert

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	164-173
Number of pages	10
Journal	Microporous and Mesoporous Materials
Volume	197
DOIs	https://doi.org/10.1016/j.micromeso.2014.06.009
State	Published - Oct 2014
Externally published	Yes

Funding

S.D.L. thanks to the Belgian National Funds for Scientific Research (F.R.S.-FNRS) for her Associate Researcher position. M.B. thanks to the Belgian Fonds pour la formation à la Recherche dans l’Industrie et dans l’Agriculture (FRIA) for a PhD Grant. R.H. thanks support of the Helmholtz Association of German Research Centres for Grants NG-407. The authors are grateful to the Ministère de la Région Wallonne Direction Générale des Technologies, de la Recherche et de l’Energie, the Fonds de Recherche Fondamentale Collective and the Belgian National Funds for Scientific Research (F.R.S.-FNRS).

Funders	Funder number
Fonds De La Recherche Scientifique - FNRS
Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture
Direction Générale de la Compétitivité, de l’Industrie et des Services
Helmholtz Association	NG-407

Keywords

Cogelled xerogels
Iron oxide nanoparticles
Photo-Fenton effect
Sol-gel process
p-Nitrophenol degradation

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10.1016/j.micromeso.2014.06.009

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title = "Highly dispersed iron xerogel catalysts for p-nitrophenol degradation by photo-Fenton effects",

abstract = "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 M{\"o}ssbauer 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.",

keywords = "Cogelled xerogels, Iron oxide nanoparticles, Photo-Fenton effect, Sol-gel process, p-Nitrophenol degradation",

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language = "English",

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AU - Mahy, Julien G.

AU - Tasseroul, Ludivine

AU - Zubiaur, Anthony

AU - Geens, Jérémy

AU - Brisbois, Magali

AU - Herlitschke, Marcus

AU - Hermann, Raphaël

AU - Heinrichs, Benoît

AU - Lambert, Stéphanie D.

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N2 - 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.

AB - 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.

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KW - Iron oxide nanoparticles

KW - Photo-Fenton effect

KW - Sol-gel process

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Highly dispersed iron xerogel catalysts for p-nitrophenol degradation by photo-Fenton effects

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Keywords

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