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Issue 10, 2007
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Synthesis of iron oxide nanoparticles using a freshly-made or recycled imidazolium-based ionic liquid

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Abstract

This paper reports the synthesis of iron oxide nanoparticles using a freshly-made or recycled 1-butyl-3-methylimidazolium bis(triflylmethylsulfonyl)imide ([BMIM][Tf2N]) ionic liquid (IL). Iron pentacarbonyl (Fe(CO)5), which dissolves in [BMIM][Tf2N], thermally decomposed and subsequently oxidized to form iron oxide nanoparticles. These nanoparticles separated out automatically from the imidazolium-based ionic liquid mixtures. Multiple additional runs were tested in making iron oxide nanoparticles using recycled ionic liquid. The iron oxide nanoparticles made were characterized with transmission electron microscopy (TEM), high resolution TEM (HR-TEM) and powder X-ray diffraction (PXRD). The structure and thermal stability of the IL was examined using Fourier transform infrared (FT-IR) spectroscopy and thermal gravimetric analysis (TGA). We found that iron oxide nanoparticles with a narrow size distribution could be obtained. The [BMIM][Tf2N] ionic liquid showed no degradation based on the TGA and FT-IR study. The solvent-recyclable process of making size-controlled nanoparticles should have a broad impact on the application of imidazolium-based ionic liquids in the synthesis of nanomaterials.

Graphical abstract: Synthesis of iron oxide nanoparticles using a freshly-made or recycled imidazolium-based ionic liquid

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Publication details

The article was received on 02 Jan 2007, accepted on 21 May 2007 and first published on 08 Jun 2007


Article type: Paper
DOI: 10.1039/B618933D
Citation: Green Chem., 2007,9, 1051-1056
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    Synthesis of iron oxide nanoparticles using a freshly-made or recycled imidazolium-based ionic liquid

    Y. Wang, S. Maksimuk, R. Shen and H. Yang, Green Chem., 2007, 9, 1051
    DOI: 10.1039/B618933D

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