Synthesis of Magnetic Nanocomposites and Sensitive Detection for Copper(Ⅱ)

doi:10.11944/j.issn.1000-0518.2017.01.160385

Chinese Journal of Applied Chemistry ›› 2017, Vol. 34 ›› Issue (1): 111-117.DOI: 10.11944/j.issn.1000-0518.2017.01.160385

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Synthesis of Magnetic Nanocomposites and Sensitive Detection for Copper(Ⅱ)

JIAO Yuan,LIU Fuyong,WANG Songbai,SHUANG Shaomin,DONG Chuan()

Institute of Environmental Science,School of Chemistry and Chemical Engineering,Shanxi University,Taiyuan 030006,China

Received:2016-09-23 Accepted:2016-11-15 Published:2017-01-03 Online:2017-01-03
Contact: DONG Chuan
Supported by:
Supported by the National Natural Science Foundation of China(No. 21575084, No.21475080), Higher School and Technology Innovation Project in Shanxi Province(No.2016105)

Abstract

Abstract:

The magnetic nanoparticles(NPs) coated with silica NPs(Fe₃O₄@SiO₂) were prepared by chemical co-precipation method. A multifunctional magnetic nanocomposite(Fe₃O₄@SiO₂-Pyh) was fabricated by grafting pyridoxal hydrazide(Pyh) to the surface of Fe₃O₄@SiO₂ NPs via hexamethylene diisocyanate. The structure, morphology, and magnetic property of Fe₃O₄@SiO₂-Pyh were characterized by Fourier transform infrared spectroscopy, transmission electron microscopy, and X-ray powder diffraction. The Fe₃O₄@SiO₂-Pyh has a clear core shell architecture, in which an average particle diameter is 50~55 nm with about 15 nm SiO₂ shell. Fe₃O₄@SiO₂-Pyh contains —CO—NH—N=CH— active groups, which can coordinate with Cu²⁺ to form stable complex. Based on this principle we established an analytical method for the determination of Cu²⁺, which was characterized by UV-Vis spectroscopy. The linear range of detecting Cu²⁺ concentration is 3.4×10^-7~4.5×10^-6 mol/L with detection limit 1.03×10^-7 mol/L. Moreover, the nanocomposites display superparamagnetic properties, which can be used for effective separation of excess Cu²⁺ from the liquid phase by applying an external magnetic field. As-synthesized Fe₃O₄@SiO₂-Pyh can be a good candidate for selective detection and simple removal of Cu²⁺ in environmental fields.

Key words: pyridoxal hydrazide, magnetic nanocomposite, copper ion(Ⅱ), UV-Vis spectroscopy

JIAO Yuan, LIU Fuyong, WANG Songbai, SHUANG Shaomin, DONG Chuan. Synthesis of Magnetic Nanocomposites and Sensitive Detection for Copper(Ⅱ)[J]. Chinese Journal of Applied Chemistry, 2017, 34(1): 111-117.

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Synthesis of Magnetic Nanocomposites and Sensitive Detection for Copper(Ⅱ)

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