Pore geometry effect on the synthesis of silica supported perovskite oxides

[Display omitted] The formation of perovskite oxide nanoparticles supported on ordered mesoporous silica with different pore geometry is here presented. Systematic study was performed varying both pore shape (gyroidal, cylindrical, spherical) and size (7.5, 12, 17nm) of the hosts. LaFeO3, PrFeO3 and...

Full description

Saved in:
Bibliographic Details
Published in:Journal of colloid and interface science 2017-10, Vol.504, p.346-355
Main Authors: Scholz, Jonas, Etter, Martin, Haas, Diana, Meyer, Andreas, Kornowski, Andreas, Sazama, Uta, Mascotto, Simone
Format: Article
Language:English
Subjects:
Confinement
Heterogeneous catalysis
Ink-bottle pores
Nanocasting
Perovskite
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] The formation of perovskite oxide nanoparticles supported on ordered mesoporous silica with different pore geometry is here presented. Systematic study was performed varying both pore shape (gyroidal, cylindrical, spherical) and size (7.5, 12, 17nm) of the hosts. LaFeO3, PrFeO3 and LaCoO3 were chosen as target guest structures. The distribution of the oxide nanoparticles on silica was comprehensively assessed using a multi-technique approach. It could be shown that the pore geometry plays a determining role in the conversion of the infiltrated metal nitrates to metal oxide. In particular, slow degradation kinetic was observed in highly curved pores, which fostered nucleation and crystallization of the guest species. In spherical pore systems the enhancement of pore size caused a remarkable delay of the decomposition of the metal salts, but at the same time improved the homogeneous distribution of the oxide particles in the matrix.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2017.05.107