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Reference type: Journal
Authors: Cui HZ, Li YL, Liu S, Zhang JF, Zhou Q, Zhong R, Yang ML, Hou XF
Article Title: Novel Pb(II) ion-imprinted materials based on bis-pyrazolyl functionalized mesoporous silica for the selective removal of Pb(II) in water samples.
Publication date: 2017
Journal: Microporous And Mesoporous Materials
Volume: 241
Page numbers: 165-177.
DOI: 10.1016/j.micromeso.2016.12.036
Alternative URL: http://www.sciencedirect.com/science/article/pii/S1387181116305959

Abstract: Three highly efficient adsorbents Pb-IIMS-SBA-15, Pb-IIMS-MCM-41 and Pb-IIMS-FDU-12 for Pb(II) were prepared by grafting the functional monomer 4-(di (1H-pyrazol-1-yl) methyl) phenol (DPP) on corresponding mesoporous silicas with Pb(II) as temple. All these three Pb(II) ion-imprinted mesoporous silica (Pb-IIMS) were characterized by Fourier transform-infrared spectroscopy (FT-IR), solid-state 29Si and 13C NMR spectra, scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), N2 adsorptionGă˘desorption analysis and small angel X-ray diffraction (XRD). The adsorption experiments revealed three Pb-IIMS all possessed considerable adsorption performance for Pb(II), their adsorption profiles obeyed pseudo-second-order kinetics and Langmuir isotherm model. Compared with their corresponding non-imprinted materials, three Pb-IIMS displayed satisfactory selectivity to Pb(II) over seven competing metal ions. Among them, Pb-IIMS-MCM-41 particularly owned outstanding adsorption performance and selectivity, the maximum adsorption capacity as high as 344.8 mg g-1, as well as excellent reusability through twelve adsorption-desorption cycles. Additionally, Pb-IIMS-MCM-41 was employed as packing material to construct a solid-phase extraction column for detection of Pb(II), which exhibited detection limit of 0.015 μg L-1, then method was successfully applied to the removal and determination of trace Pb(II) in practical water samples
Template and target information: lead ion, Pb(II)
Author keywords: Pb(II), Ion-imprinted mesoporous silica, Bis-pyrazolyl functional monomer, selective adsorption, Solid-phase extraction column

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