Citation: 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. doi: 10.11944/j.issn.1000-0518.2017.01.160385 shu

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

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

Corresponding author: DONG Chuan, dc@sxu.edu.cn
Received Date: 23 September 2016
Revised Date: 27 October 2016
Accepted Date: 27 October 2016

Fund Project: Higher School and Technology Innovation Project in Shanxi Province 2016105the National Natural Science Foundation of China No. 21575084, No.21475080

Figures(12)

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.
- pyridoxal hydrazide,
- magnetic nanocomposite,
- copper ion (Ⅱ),
- UV-Vis spectroscopy
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