Facile Synthesis of Fe-Loaded Mesoporous Silica by a Combined Detemplation−Incorporation Process through Fenton’s Chemistry
Yong-Mei Liu
Jie Xu
Lin He
Yong Cao
He-Yong He
Dong-Yuan Zhao
Ji-Hua Zhuang
Kang-Nian Fan
10.1021/jp802202v.s001
https://acs.figshare.com/articles/journal_contribution/Facile_Synthesis_of_Fe_Loaded_Mesoporous_Silica_by_a_Combined_Detemplation_Incorporation_Process_through_Fenton_s_Chemistry/2905612
The present work describes a new approach to synthesize Fe species within the channels of mesoporous SBA-15 silica using Fenton’s reagent (Fe<sup>2+</sup>-H<sub>2</sub>O<sub>2</sub>) as an iron precursor. For the first time Fe ions were incorporated within as-synthesized surfactant-containing mesoporous host by a simultaneous detemplation and Fe-incorporation process at low temperature. The resulting materials were characterized by X-ray diffraction (XRD), thermogravimetric differential thermal analysis, N<sub>2</sub> sorption, DRIFTS, transmission electron microscopy (TEM), UV−vis diffuse reflectance spectroscopy, UV Raman, X-ray photoelectron spectroscopy, and Friedel−Crafts alkylation catalysis. The ordered mesostructure of the SBA-15 host is retained as indicated by XRD and HRTEM, and the surface areas of the Fe-SBA-15 materials are in the range of 640−853 m<sup>2</sup> g<sup>−1</sup> comparable to 784 m<sup>2</sup> g<sup>−1</sup> for the calcined host. The characterization results also indicate the presence of iron species inside the silica pores, as well as a good dispersion of the iron oxide nanoclusters within the pores of the host material. Controlled iron loading was possible to a maximum of 9 wt %. The catalyst shows significantly enhanced performance on benzylation of benzene using benzyl chloride as the alkylating agent compared to conventionally prepared Fe/SBA-15.
2008-10-23 00:00:00
mesoporou
characterization results
HRTEM
time Fe ions
surface areas
iron precursor
N 2 sorption
alkylating agent
Fe species
Facile Synthesis
XRD
Fenton
TEM
benzyl chloride
iron species
UV Raman
transmission electron microscopy
reflectance spectroscopy
DRIFTS
SBA
host material
calcined host
iron oxide nanoclusters
silica pores
Controlled iron loading