Synthesis and Characterization of Iron Oxyhydroxide Nanowires

Londoño-Calderón, C. L.; Bilovol, V.; Cosio‐Castaneda, Carlos; Pampillo, Laura Gabriela; S, Micheli; Pirota, K. R.; Socolovsky, L.M.; Martínez-Garcı́a, R.

doi:10.1109/tmag.2013.2255027

Cited by 4 publications

(4 citation statements)

References 30 publications

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“…Nanoporous anodic aluminum oxide (AAO) templates with an average pore diameter of 29 nm and 3.7 µm thick were prepared by two-step anodization technique [33] and subsequently used for the grow of CoFe 2,7 nanowires. The electrical contact at the pore bottom was achieved by the oxide barrier layer reduction procedure [34].…”

Section: Methodsmentioning

confidence: 99%

Synthesis and magnetic properties of cobalt-iron/cobalt-ferrite soft/hard magnetic core/shell nanowires

et al. 2017

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A straightforward method for the synthesis of CoFe/CoFeO core/shell nanowires is described. The proposed method starts with a conventional pulsed electrodeposition procedure on alumina nanoporous template. The obtained CoFe nanowires are released from the template and allowed to oxidize at room conditions over several weeks. The effects of partial oxidation on the structural and magnetic properties were studied by x-ray spectrometry, magnetometry, and scanning and transmission electron microscopy. The results indicate that the final nanowires are composed of 5 nm iron-cobalt alloy nanoparticles. Releasing the nanowires at room conditions promoted surface oxidation of the nanoparticles and created a CoFeO shell spinel-like structure. The shell avoids internal oxidation and promotes the formation of bi-magnetic soft/hard magnetic core/shell nanowires. The magnetic properties of both the initial single-phase CoFe nanowires and the final core/shell nanowires, reveal that the changes in the properties from the array are due to the oxidation more than effects associated with released processes (disorder and agglomeration).

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Section: Methodsmentioning

confidence: 99%

Synthesis and magnetic properties of cobalt-iron/cobalt-ferrite soft/hard magnetic core/shell nanowires

et al. 2017

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“…The water molecules are oxidized at the CNF surface and produce free radicals that contribute to the photooxidation of MB. These results emphasize that the natural nano-goethite-based CNF structure is efficient as the nanowires with synthetic goethite of Londoño-Calderon [41] and Amani-Ghadim et al [37], which photodegraded up to 90% of the dye in 2 h.…”

Section: Langmuir Model Mbmentioning

confidence: 59%

Nanocomposite Fiber Based on Natural Material for Water Disinfection under Visible Light Irradiation

et al. 2020

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In the last decade, pathogenic bacteria and organic micropollutants have become a major issue in the water purification process. Heterogeneous photocatalysis is a low-cost and an ecofriendly process, which provides a sustainable solution for water treatment and its utilization in rural areas. In this context, we studied the generation and the surface engineering of polyacrylonitrile (PAN)/goethite composite nanofibers for photocatalytic water remediation under visible-light illumination. The photocatalytic activity was evaluated for dye (methylene blue) degradation and bacteria inactivation, as contaminant models, of the composite nanofibers. The PAN/goethite nanofibers were elaborated by an electrospinning technique, and the morphology and the composition, before and after spin coating, were investigated by Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray (EDX). The results showed partially intercalated structures of the PAN/goethite Composite-nano-fiber (CNF) were identified by SEM and EDX analysis. The composite nanofibers exhibited high photoefficiency upon dye bleaching (only 10% left after 5 h of illumination) and bacterial deactivation Escherichia coli and Clostridium perfringens (4.4- and 3.5-fold, respectively, in less than 5 h). The steadiness and pliancy of the generated nanofibers provide a promising application in the continuous flow system.

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“…Estos aglomerados son un arreglo compacto de numerosas nanopartículas de CoFe 2 O 4 . Esta morfología es típica de NHs que se fabrican por el método de impregnación por vacío [9].…”

Section: Figuraunclassified

Fabricación de alúmina anódica porosa de bajo costo: Un estudio comparativo de la morfología producida por uno y dos pasos de anodizado

et al. 2016

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RESUMEN Se describe un método simple y barato para la fabricación de moldes de alúmina nanoporosa, con potenciales aplicaciones para la fabricación de nanohilos. Se utiliza como materia prima un aluminio de grado comercial. Los moldes nanoporosos fabricados tienen un diámetro promedio de poros de (20 ± 4) nm. El proceso de fabricación consta de dos etapas de anodizado. Se detallan ambas etapas de anodizado y se caracteriza el material que se obtiene como resultado de cada una de ellas. Los moldes nanoporosos obtenidos con dos pasos de anodizado tienen la distribución más estrecha de tamaño de poros, mejor circularidad y orden espacial. En dichos moldes se crecen nanohilos a base de ferrita de cobalto (CoFe2O4). Para hacerlo, se usa un método simple y un equipamiento sencillo. Mediante microscopía electrónica se hace una caracterización morfológica de las plantillas y de los nanohilos obtenidos.

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Synthesis and Characterization of Iron Oxyhydroxide Nanowires

Cited by 4 publications

References 30 publications

Synthesis and magnetic properties of cobalt-iron/cobalt-ferrite soft/hard magnetic core/shell nanowires

Synthesis and magnetic properties of cobalt-iron/cobalt-ferrite soft/hard magnetic core/shell nanowires

Nanocomposite Fiber Based on Natural Material for Water Disinfection under Visible Light Irradiation

Fabricación de alúmina anódica porosa de bajo costo: Un estudio comparativo de la morfología producida por uno y dos pasos de anodizado

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