Abstract
This paper reports the synthesis, characterization and mercury adsorption behaviour of new organic–inorganic hybrid nanostructured silicas obtained by co-condensation, molecular imprinting and post-synthesis routes. N2 adsorption–desorption measurements, XRD, FT-IR, MAS NMR, SEM, TEM and elemental analysis were used to characterize the physico-chemical properties of the hybrid nanostructured materials. The materials were studied for Hg(II) adsorption in aqueous medium at pH 3 and compared with unmodified nanostructured silica. Mercury adsorption was higher in the hybrid material prepared by the co-condensation method that reached a mercury uptake of 134 mg Hg/g. The best mercury adsorption efficiency was observed for the hybrid material prepared by molecular imprinting route. The synthetic route employed clearly affects the textural properties of the silica, the amount of organic ligand attached onto the support and mercury adsorption behaviour.
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Authors thanks financial support from the Comunidad Autónoma de Madrid and European funding from the FEDER Programme (Project S2009/AGR-1,464, ANALISYC-II) and Ministerio de Ciencia e Innovación (Project CTQ2008-05821/PPQ).
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Appendix A includes SEM, TEM images and FT-IR spectra of S1, Co-S2, MI-S3 and PS-S4 materials, and elemental analysis results. (DOC 5353 kb)
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Pérez-Quintanilla, D., Sierra, I. Factors affecting Hg(II) adsorption on hybrid nanostructured silicas: influence of the synthesis conditions. J Porous Mater 21, 71–80 (2014). https://doi.org/10.1007/s10934-013-9749-4
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DOI: https://doi.org/10.1007/s10934-013-9749-4