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Nickel–iron layered double hydroxide (LDH): Textural properties upon hydrothermal treatments and application on dye sorption

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Abstract.
NiFeCO3 hydrotalcites with Ni/Fe molar ratio of 3were synthesized by co-precipitationmethod at constant
pH, followed by hydrothermal treatment at various temperatures 85–180 ◦C for 3–360 h. The obtained
materials were characterized by XRD analysis, FT-IR spectroscopy, SEM and TEM microscopy, TGA and
BET techniques. The resulting materials were found to be similar to the hydrotalcite with a well-defined
hexagonal morphology of crystallites. The hydrothermal treatment and aging time increases the platelet
sizes and decreases the surface area. XRD analysis showed the formation of sharper and intense peaks,
which might indicate the larger crystallites size ofLDHaswell as higher crystallinity. Furthermore, textural
studies revealed influence of aging time and temperature on the properties of the crystalline phase. The
prolonged time tends to form additional products, identified as NiFe2O4 spinel and NiO nickel oxide.
The effect of hydrothermal treatment temperature on the kinetics of dye removal has been explored. It
was found that the percentage color removal increases with increasing hydrothermal treatment temperature
up to 140 ◦C and aging time up to 4 days. Furthermore, the color removal decreases with increasing
hydrothermal treatment temperature up to 140–180 ◦C and prolonged aging time.

Keywords:
Anionic clays
Hydrothermal treatment
Crystallinity
Textile dye
Adsorption

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Informasi Detail

Judul Seri

Journal of Hazardous Materials

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Journal of Hazardous Materials 165 (2009) 206–217

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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