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Reference type: Journal
Authors: Zhang ZH, Zhang HB, Hu YF, Yang X, Yao SZ
Article Title: Novel surface molecularly imprinted material modified multi-walled carbon nanotubes as solid-phase extraction sorbent for selective extraction gallium ion from fly ash.
Publication date: 2010
Journal: Talanta
Volume: 82
Issue: (1)
Page numbers: 304-311.
DOI: 10.1016/j.talanta.2010.04.038
Alternative URL: http://www.sciencedirect.com/science/article/B6THP-4YX7K7X-F/2/35aeb23721b12a7d1eb3b87400ca39f0

Abstract: A new gallium (Ga(III)) ion-imprinted multi-walled carbon nanotubes (CNTs) composite sorbent was synthesized by a surface imprinting technique. The Ga(III) ion-imprinted/multi-walled carbon nanotubes (Ga(III)-imprinted/CNTs) sorbent was characterized by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), nitrogen adsorption experiment, static adsorption experiment, and solid-phase extraction (SPE) experiment. The effects of sample volume, sample pH, washing and elution conditions on the extraction of Ga(III) ion from real sample were studied in detail. The imprinted sorbent offered a fast kinetics for the adsorption of Ga(III). The maximum static adsorption capacity of the imprinted sorbent towards was 58.8 μmol g-1. The largest selectivity coefficient for Ga(III) in the presence of Al(III) was over 57.3. Compared with non-imprinted sorbent, the imprinted sorbent showed good imprinting effect for Ga(III) ion, the imprinting factor (α) was 2.6, the selectivity factor (β) was 2.4 and 2.9 for Al(III) and Zn(II), respectively. The developed imprinted SPE method was applied successfully to the detection of trace Ga(III) ion in fly ash samples with satisfactory results
Template and target information: gallium ion, Ga(III)
Author keywords: molecular imprinting, Multi-walled carbon nanotubes, Gallium ion, Solid-phase extraction


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