RT Journal Article
T1 One-step Sustainable Preparation of Superparamagnetic Iron Oxide Nanoparticles Supported on Mesoporous SiO2
A1 Chamorro, Elena
A1 Granados García Tenorio, María José
A1 Calvo Garrido, María Lourdes
A1 Torralvo Fernández, María José
A1 Sáez Puche, Regino
A1 Cabañas Poveda, Albertina
AB Superparamagnetic iron oxide nanoparticles (SPIONs) supported on high surface area mesoporous SiO2 are advanced materials of great interest in catalysis, adsorption and biomedicine. Here we present a new process to prepare SPION/SiO2 materials by the impregnation and insitu decomposition of Fe(NO3)3.9H2O on mesoporous SiO2 supports in a 25-50% mol ethanol + CO2 mixture at 523 K and 25.0 MPa. -Fe2O3 nanoparticles (NPs) of average size between 6-9 nm were distributed homogeneously on the supports. NPs deposited into the SBA-15 mesopores but mostly on the external surface of MCM-41. Materials prepared with the highest ethanol content were very homogeneous. Magnetic measurements confirmed the superparamagnetic nature of the materials at room temperature. The process proposed is sustainable and scalable, avoids tedious preparations and the additional high temperature treatment under a controlled atmosphere, as the metal decomposition is performed insitu in the CO2-expanded liquid mixture.
PB Elsevier
SN 0896-8446
YR 2020
FD 2020-05
LK https://hdl.handle.net/20.500.14352/6402
UL https://hdl.handle.net/20.500.14352/6402
LA eng
NO Ministerio de Ciencia, Innovación y Universidades (España)
NO Universidad Complutense de Madrid /Banco de Santander
DS Docta Complutense
RD 30 ago 2024