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A metal-organic framework nanocomposite made from functionalized magnetite nanoparticles and HKUST-1 (MOF-199) for preconcentration of Cd(II), Pb(II), and Ni(II)

Research paper by Ebrahim Ghorbani-;Kalhor

Indexed on: 20 Aug '16Published on: 01 Sep '16Published in: Microchimica Acta



Abstract

The author describes the preparation of a magnetic metal organic framework of type MOF-199 containing magnetite (Fe3O4) nanoparticles carrying covalently immobilized 4-(thiazolylazo) resorcinol (Fe3O4@TAR). This material is shown to represent a viable sorbent for separation and preconcentration of Cd(II), Pb(II), and Ni(II) ions. Box-Behnken design was applied to optimize the parameters affecting preconcentration. Following elution with 0.6 mol L−1 EDTA, the ions were quantified by FAAS. The capacity of the sorbent ranged between 185 and 210 mg g−1. The limits of detection are 0.15, 0.40, and 0.8 ng mL−1 for Cd(II), Ni(II), and Pb(II) ions, respectively. The relative standard deviations are <8.5 %. The method was successfully applied to the rapid extraction of trace amounts of these ions from sea food and agri food. Graphical abstract (a) A schematic diagram of Fe3O4 functionalization by TAR (4-(thiazolylazo) resorcinol). (b) The schematic illustration of the magnetic metal organic framework-TAR nanocomposite. H3BTC: benzene-1,3,5-tricarboxylic acid; TEA: triethylamine; 3-CPS: 3-chloropropyl triethoxysilane. The author describes the preparation of a magnetic metal organic framework of type MOF-199 containing magnetite (Fe3O4) nanoparticles carrying covalently immobilized 4-(thiazolylazo) resorcinol (Fe3O4@TAR). This material is shown to represent a viable sorbent for separation and preconcentration of Cd(II), Pb(II), and Ni(II) ions. Box-Behnken design was applied to optimize the parameters affecting preconcentration. Following elution with 0.6 mol L−1 EDTA, the ions were quantified by FAAS. The capacity of the sorbent ranged between 185 and 210 mg g−1. The limits of detection are 0.15, 0.40, and 0.8 ng mL−1 for Cd(II), Ni(II), and Pb(II) ions, respectively. The relative standard deviations are <8.5 %. The method was successfully applied to the rapid extraction of trace amounts of these ions from sea food and agri food.3434−1−1−1 Graphical abstract (a) A schematic diagram of Fe3O4 functionalization by TAR (4-(thiazolylazo) resorcinol). (b) The schematic illustration of the magnetic metal organic framework-TAR nanocomposite. H3BTC: benzene-1,3,5-tricarboxylic acid; TEA: triethylamine; 3-CPS: 3-chloropropyl triethoxysilane. Graphical abstract (a) A schematic diagram of Fe3O4 functionalization by TAR (4-(thiazolylazo) resorcinol). (b) The schematic illustration of the magnetic metal organic framework-TAR nanocomposite. Graphical abstract (a) A schematic diagram of Fe3O4 functionalization by TAR (4-(thiazolylazo) resorcinol). (b) The schematic illustration of the magnetic metal organic framework-TAR nanocomposite.Graphical abstract (a) A schematic diagram of Fe3O4 functionalization by TAR (4-(thiazolylazo) resorcinol). (b) The schematic illustration of the magnetic metal organic framework-TAR nanocomposite.(a) A schematic diagram of Fe3O4 functionalization by TAR (4-(thiazolylazo) resorcinol). (b) The schematic illustration of the magnetic metal organic framework-TAR nanocomposite.34H3BTC: benzene-1,3,5-tricarboxylic acid; TEA: triethylamine; 3-CPS: 3-chloropropyl triethoxysilane. 3