Synthesis of Ag/SiO2/Chitosan Nanocomposites and Its Analytical Application for Adsorbing Chromium(Ⅵ)

doi:10.3969/j.issn.0251-0790.2012.03.009

Abstract

Abstract:

The Ag/SiO₂/Chitosan nanocomposites were synthesized by the reverse microemulsion method and characterized by TEM, CV(cyclic voltammetry) and UV-Vis spectroscopy. The results show that the nanocomposites present better electrical conductivity, anion channel effect and adsorption effect for chromium(Ⅵ). Based on these findings as well as the use of chemically modified electrode technique, a sensitive and selective electrochemiluminescence method for chromium(Ⅵ) was developed. Under the optimal experimental conditions, the enhancing ECL(electrochemiluminescence) intensity was linear with the concentration of chromium(Ⅵ) in the range of 2.0×10^-12-1.0×10^-10 g/mL. The detection limit for chromium(Ⅵ) was 2×10^-13 g/mL.

Key words: Nanocomposite, Detection of chromium(Ⅵ), Electrochemiluminescence, Luminol

CLC Number:

O657.1

TrendMD:

ZHANG Yan, ZHENG Xing-Wang. Synthesis of Ag/SiO₂/Chitosan Nanocomposites and Its Analytical Application for Adsorbing Chromium(Ⅵ)[J]. Chem. J. Chinese Universities, 2012, 33(03): 481.

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Synthesis of Ag/SiO₂/Chitosan Nanocomposites and Its Analytical Application for Adsorbing Chromium(Ⅵ)

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