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Reference type: Journal
Authors: Pérez-Quintanilla D, Sánchez A, Sierra I
Article Title: Preparation of hybrid organic-inorganic mesoporous silicas applied to mercury removal from aqueous media: Influence of the synthesis route on adsorption capacity and efficiency.
Publication date: 2016
Journal: Journal of Colloid and Interface Science
Volume: 472
Page numbers: 126-134.
DOI: 10.1016/j.jcis.2016.03.048
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0021979716301904

Abstract: New hybrid organic-inorganic mesoporous silicas were prepared by employing three different synthesis routes and mercury adsorption studies were done in aqueous media using the batch technique. The organic ligands employed for the functionalization were derivatives of 2-mercaptopyrimidine or 2-mercaptothiazoline, and the synthesis pathways used were post-synthesis, post-synthesis with surface ion-imprinting and co-condensation with ion-imprinting. The incorporation of functional groups and the presence of ordered mesopores in the organosilicas was confirmed by XRD, TEM and SEM, nitrogen adsorption-desorption isotherms, 13C MAS-NMR, 29Si MAS-NMR, elemental and thermogravimetric analysis. The highest adsorption capacity and selectivity observed was for the material functionalized with 2-mercaptothiazoline ligand by means the co-condensation with ion-imprinting route (1.03 mmol g-1 at pH 6). The prepared material could be potential sorbent for the extraction of this heavy metal from environmental and drinking waters
Template and target information: mercury ion, Hg(II)
Author keywords: Hybrid mesoporous silicas, Post-synthesis, Co-condensation, ion imprinting, 2-Mercaptopyrimidine, 2-Mercaptothiazoline, mercury, cadmium

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