Preparation of three-dimensionally ordered macroporous perovskite-type lanthanum-iron-oxide LaFeO{sub 3} with tunable pore diameters: High porosity and photonic property

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.04.012· OSTI ID:21421524

Sadakane, Masahiro ^[1]; Horiuchi, Toshitaka; Kato, Nobuyasu; Sasaki, Keisuke ^[1]; Ueda, Wataru ^[1]

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1. Catalysis Research Center, Hokkaido University, N-21, W-10, Sapporo 001-0021 (Japan)

Three-dimensionally ordered macroporous (3DOM) lanthanum-iron-oxide (LaFeO{sub 3}) with different pore diameters was prepared using a colloidal crystal of polymer spheres with different diameters as templates. Ethylene glycol-methanol mixed solution of metal nitrates was infiltrated into the void of the colloidal crystal template of a monodispersed poly(methyl methacrylate) (PMMA) sphere. Heating of this PMMA-metal salt-ethylene glycol composite produced the desired well-ordered 3DOM LaFeO{sub 3} with a high pore fraction, which was confirmed by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), mercury (Hg) porosimetry, and ultraviolet-visible (UV-vis) diffuse reflectance spectra. 3DOM LaFeO{sub 3} with pore diameters of 281 and 321 nm shows opalescent colors because of photonic stop band properties. Catalytic activity of the 3DOM LaFeO{sub 3} for combustion of carbon particles was enhanced by a potassium cation, which was involved from K{sub 2}S{sub 2}O{sub 8} used as a polymerization initiator. - Graphical abstract: Well-ordered three-dimensionally ordered macroporous LaFeO{sub 3} materials with pore sizes ranging from 127 to 321 nm were obtained in a high pore fraction.

• OSTI ID: 21421524
• Journal Information: Journal of Solid State Chemistry, Vol. 183, Issue 6; Other Information: DOI: 10.1016/j.jssc.2010.04.012; PII: S0022-4596(10)00145-3; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMBUSTION
CRYSTALS
GLYCOLS
IRON OXIDES
LANTHANUM COMPOUNDS
MERCURY
METHANOL
NITRATES
PEROVSKITE
PERSULFATES
PMMA
POROSITY
POTASSIUM COMPOUNDS
SCANNING ELECTRON MICROSCOPY
TRANSMISSION ELECTRON MICROSCOPY
VOIDS
X-RAY DIFFRACTION
ALCOHOLS
ALKALI METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
DIFFRACTION
ELECTRON MICROSCOPY
ELEMENTS
ESTERS
HYDROXY COMPOUNDS
IRON COMPOUNDS
METALS
MICROSCOPY
MINERALS
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDATION
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
POLYACRYLATES
POLYMERS
POLYVINYLS
RARE EARTH COMPOUNDS
SCATTERING
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS