%0 Journal Article
%A Mahy, Julien G.
%A Tasseroul, Ludivine
%A Zubiaur, Anthony
%A Geens, Jérémy
%A Brisbois, Magali
%A Herlitschke, Marcus
%A Hermann, Raphaël
%A Heinrichs, Benoît
%A Lambert, Stéphanie D.
%T Highly dispersed iron xerogel catalysts for p-nitrophenol degradation by photo-Fenton effects
%J Microporous and mesoporous materials
%V 197
%@ 1387-1811
%C Amsterdam [u.a.]
%I Elsevier
%M FZJ-2014-04674
%P 164 - 173
%D 2014
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000340990200021
%R 10.1016/j.micromeso.2014.06.009
%U https://juser.fz-juelich.de/record/155606