Facile synthesis of silica-manganese oxide nanocomposites with core-shell structure using surfactant and cosurfactant

Jun Hwan Park, Seong-Geun Oh

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

In this study, silica-manganese oxide (Mn3O4) nanocomposites with core-shell structure were synthesized using surfactant and cosurfactant in the sol-gel reaction medium for the formation of spherical silica nanoparticles at basic condition using NH4OH as a catalyst. In order to prepare the composites of silica and Mn3O4, the aqueous solution of manganese nitrate, cetyltrimethylammonium bromide (CTAB) and tert-butanol (t-butanol) was added into the sol-gel reaction solution after the formation of silica particles which would be negative-charged at basic condition. CTAB and t-butanol as binders induced the attractive interaction between silica and Mn(OH)2 by their adsorption onto the surface of Mn(OH)2 formed by the reaction between Mn nitrate and NH4OH. After the Mn(OH)2 particles were prepared, they were transformed into Mn3O4 through the oxidation in air due to its very high reactivity. Through this process, the silica-Mn3O4 nanocomposites with controllable core-shell structure were synthesized with the variations of volume of Mn solution and concentrations of Mn nitrate, CTAB, and t-butanol. The characterizations of the silica-Mn3O4 nanocomposites were performed using FE-SEM, TEM, EDS, XRD, and TGA. The magnetization of composites was studied using a vibrating sample magnetometer (VSM) at room temperature in the range of -5000 to 5000Oe.

Original languageEnglish
Pages (from-to)199-206
Number of pages8
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume390
Issue number1-3
DOIs
StatePublished - 2011 Oct 20

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Manganese oxide
Surface-Active Agents
Silicon Dioxide
tert-Butyl Alcohol
Nanocomposites
Surface active agents
Silica
Butenes
Nitrates
Sol-gels
Composite materials
Magnetometers
Manganese
manganese oxide
Binders
Energy dispersive spectroscopy
Magnetization
Nanoparticles
Transmission electron microscopy
Adsorption

Keywords

  • Cosurfactant
  • Nanocomposites
  • Silica
  • Surfactant

Cite this

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title = "Facile synthesis of silica-manganese oxide nanocomposites with core-shell structure using surfactant and cosurfactant",
abstract = "In this study, silica-manganese oxide (Mn3O4) nanocomposites with core-shell structure were synthesized using surfactant and cosurfactant in the sol-gel reaction medium for the formation of spherical silica nanoparticles at basic condition using NH4OH as a catalyst. In order to prepare the composites of silica and Mn3O4, the aqueous solution of manganese nitrate, cetyltrimethylammonium bromide (CTAB) and tert-butanol (t-butanol) was added into the sol-gel reaction solution after the formation of silica particles which would be negative-charged at basic condition. CTAB and t-butanol as binders induced the attractive interaction between silica and Mn(OH)2 by their adsorption onto the surface of Mn(OH)2 formed by the reaction between Mn nitrate and NH4OH. After the Mn(OH)2 particles were prepared, they were transformed into Mn3O4 through the oxidation in air due to its very high reactivity. Through this process, the silica-Mn3O4 nanocomposites with controllable core-shell structure were synthesized with the variations of volume of Mn solution and concentrations of Mn nitrate, CTAB, and t-butanol. The characterizations of the silica-Mn3O4 nanocomposites were performed using FE-SEM, TEM, EDS, XRD, and TGA. The magnetization of composites was studied using a vibrating sample magnetometer (VSM) at room temperature in the range of -5000 to 5000Oe.",
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N2 - In this study, silica-manganese oxide (Mn3O4) nanocomposites with core-shell structure were synthesized using surfactant and cosurfactant in the sol-gel reaction medium for the formation of spherical silica nanoparticles at basic condition using NH4OH as a catalyst. In order to prepare the composites of silica and Mn3O4, the aqueous solution of manganese nitrate, cetyltrimethylammonium bromide (CTAB) and tert-butanol (t-butanol) was added into the sol-gel reaction solution after the formation of silica particles which would be negative-charged at basic condition. CTAB and t-butanol as binders induced the attractive interaction between silica and Mn(OH)2 by their adsorption onto the surface of Mn(OH)2 formed by the reaction between Mn nitrate and NH4OH. After the Mn(OH)2 particles were prepared, they were transformed into Mn3O4 through the oxidation in air due to its very high reactivity. Through this process, the silica-Mn3O4 nanocomposites with controllable core-shell structure were synthesized with the variations of volume of Mn solution and concentrations of Mn nitrate, CTAB, and t-butanol. The characterizations of the silica-Mn3O4 nanocomposites were performed using FE-SEM, TEM, EDS, XRD, and TGA. The magnetization of composites was studied using a vibrating sample magnetometer (VSM) at room temperature in the range of -5000 to 5000Oe.

AB - In this study, silica-manganese oxide (Mn3O4) nanocomposites with core-shell structure were synthesized using surfactant and cosurfactant in the sol-gel reaction medium for the formation of spherical silica nanoparticles at basic condition using NH4OH as a catalyst. In order to prepare the composites of silica and Mn3O4, the aqueous solution of manganese nitrate, cetyltrimethylammonium bromide (CTAB) and tert-butanol (t-butanol) was added into the sol-gel reaction solution after the formation of silica particles which would be negative-charged at basic condition. CTAB and t-butanol as binders induced the attractive interaction between silica and Mn(OH)2 by their adsorption onto the surface of Mn(OH)2 formed by the reaction between Mn nitrate and NH4OH. After the Mn(OH)2 particles were prepared, they were transformed into Mn3O4 through the oxidation in air due to its very high reactivity. Through this process, the silica-Mn3O4 nanocomposites with controllable core-shell structure were synthesized with the variations of volume of Mn solution and concentrations of Mn nitrate, CTAB, and t-butanol. The characterizations of the silica-Mn3O4 nanocomposites were performed using FE-SEM, TEM, EDS, XRD, and TGA. The magnetization of composites was studied using a vibrating sample magnetometer (VSM) at room temperature in the range of -5000 to 5000Oe.

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