A novel cyano functionalized silica-titania oxide sol-gel based ionic liquid for the extraction of hazardous chlorophenols from aqueous environments

Bakhshaei, S. and Kamboh, M.A. and Mohamad, S. and Zain, S.M. and Ma'amor, A. (2016) A novel cyano functionalized silica-titania oxide sol-gel based ionic liquid for the extraction of hazardous chlorophenols from aqueous environments. RSC Advances, 6 (55). pp. 49358-49369. ISSN 2046-2069

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Official URL: https://doi.org/10.1039/c6ra08337d

Abstract

In the present investigation a cyano functionalized silica-titania oxide sol-gel based ionic liquid (Si-Ti@CN/IL) has been successfully synthesised via sol-gel immobilization of cyanopropyltriethoxysilane and 1-benzyl-3-(trimethoxysilylpropyl)imidazolium chloride ionic liquid (BTMP-IM) on the silica-titania mixed oxide surface. The newly prepared Si-Ti@CN/IL was used as an adsorbent for the separation/preconcentration of chlorophenols from water samples prior to their HPLC-UV determination. Synthesis of Si-Ti@CN/IL was confirmed by Fourier transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FESEM), Brunauer-Emmett-Teller (BET), thermo gravimetric analysis (TGA), X-ray diffraction (XRD) and elemental (CHNS) analysis. During the extraction process, various kinds of interactions such as π-π interactions and hydrogen bonding between the anionic/cationic sites were monitored. The extraction of chlorophenols on Si-Ti@CN/IL is highly pH dependent and a significant percent extraction was achieved at pH = 2. The Si-Ti@CN/IL provided low limit of detection (LOD = 0.83-0.95 μg L-1) with a linearity range from 10-1000 μg L-1 (LOQ = 2.77-3.17 μg L-1). The field studies with high recovery (73.39-105.54%) as well as acceptable precision (%RSD 0.82-4.19) also supported the effectiveness of Si-Ti@CN/IL, which could be useful for the extraction of selected chlorophenols from tap water, lake water and leachate from landfill sites. The comparative data support Si-Ti@CN/IL as an effective extractant for selected chlorophenols.

Item Type: Article
Uncontrolled Keywords: Field emission microscopes; Fourier transform infrared spectroscopy; Gravimetric analysis; Hydrogen bonds
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Divisions: Faculty of Science > Dept of Chemistry
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 05 Dec 2017 03:41
Last Modified: 05 Dec 2017 03:41
URI: http://eprints.um.edu.my/id/eprint/18447

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