Ionic liquid functionalized nanoporous silica for removal of anionic dye

Nanoporous silica (NPS), with an average pore diameter of 2.4nm and a surface area of 949m2g−1, was synthesized by using nonyl phenol ethoxylated decylether (NP-10) and ethyl silicate 40% (ETS-40) under acidic condition. Ionic liquid functionalized adsorbent was prepared by grafting of N-methyl-N′-p...

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Bibliographic Details
Published in:Journal of molecular liquids 2013-04, Vol.180, p.95-100
Main Authors: Zarezadeh-Mehrizi, Mansoureh, Badiei, Alireza, Mehrabadi, Abdollah Rashidi
Format: Article
Language:English
Subjects:
Anionic dye
Ethyl silicate
Methyl orange
Nanoporous silica
Nonyl phenol ethoxylated decylether
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Summary:Nanoporous silica (NPS), with an average pore diameter of 2.4nm and a surface area of 949m2g−1, was synthesized by using nonyl phenol ethoxylated decylether (NP-10) and ethyl silicate 40% (ETS-40) under acidic condition. Ionic liquid functionalized adsorbent was prepared by grafting of N-methyl-N′-propyltrimethoxysilylimidazolium chloride onto NPS for removal of methyl orange. The adsorbent was characterized by means of small-angle X-ray scattering, scanning electron microscopy, N2 adsorption–desorption isotherms, thermogravimetric analysis (TGA), Fourier transform infrared (FT-IR) and Raman spectroscopy. The kinetic data revealed that the adsorption process is consistent with the pseudo-second-order model. The Langmuir isotherm showed better correlation with the experimental data. The monolayer adsorption capacity of adsorbent was found to be 135mgg−1. Thermodynamic parameters such as enthalpy change (ΔH°=+61.72kJmol−1), free energy change (ΔG°
ISSN:0167-7322
1873-3166
DOI:10.1016/j.molliq.2013.01.007