• glycine-assisted hydrothermal synthesis and adsorption properties of crosslinked porous α-fe2o3 nanomaterials for p-nitrophenol

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 747
    • تعداد پرسش و پاسخ ها: 0
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     the porous α-fe2o3 nanomaterials were prepared using glycine as structure-directing agent via a simple hydrothermal synthesis followed by calcination. the as-prepared samples were characterized by x-ray diffraction (xrd), field-emission scanning electron microscopy (fe-sem), nitrogen adsorption–desorption isotherms measurement. the as-obtainted α-fe2o3 presents crosslinked hierarchical pore structure on small meso (ca. 15 nm), large meso (ca. 40 nm) and macro (ca. 100–200 nm) length scales. the equilibrium adsorption data of p-nitrophenol on the as-prepared samples were well fitted by the langmuir isothermal model. the adsorption kinetics was found to follow the pseudo-second-order equation. the fe2o3 samples are found to be effective adsorbent for the removal of p-nitrophenol from wastewater as a result of their high surface area and accessible diffusion pathways of porous network.

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