Magnetic molecularly imprinted polymers based on attapulgite / Fe3O4 particles for the selective recognition of 2,4 - dichlorophenol / Jianming Pan in Chemical engineering journal, Vol. 174 N° 1 (Octobre 2011)  

Public ISBD [article]  inChemical engineering journal > Vol. 174 N° 1 (Octobre 2011) . - pp.68-75 Titre : Magnetic molecularly imprinted polymers based on attapulgite / Fe3O4 particles for the selective recognition of 2,4 - dichlorophenol Type de document : texte imprimé Auteurs : Jianming Pan, Auteur ; Longcheng Xu, Auteur ; Jiangdong Dai, Auteur Année de publication : 2012 Article en page(s) : pp.68-75 Note générale : Génie chimique Langues : Anglais (eng) Mots-clés : Surface imprinted polymers Selective recognition 2,4-Dichlorophenol Attapulgite /Fe3O4 magnetic particles Magnetic susceptibility Résumé : Via encapsulation of attapulgite/Fe3O4magneticparticles (ATP/Fe3O4), the magneticmolecularlyimprintedpolymers (MMIPs) were synthesized for the selective recognition of 2,4-dichlorophenol (2,4-DCP). MMIPs were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) analysis, thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), transmission electron microscopy (TEM), nitrogen adsorption–desorption analysis and Raman spectroscopy. MMIPs were demonstrated claviform shape with an imprintedpolymer film (thickness of about 16 nm), and exhibited magnetic property (Ms = 5.67 emu g−1) and thermal stability. Batch mode adsorption studies were carried out to investigate the specific binding capacity, binding kinetics and recognition specificity. The Langmuir isotherm model was fitted to the equilibrium data better than the other models, and the monolayer adsorption capacity of MMIPs were 145.79 mg g−1 at 298 K. The kinetic properties of MMIPs were well described by the pseudo-second-order equation, initial adsorption rate and half-adsorption time. The selective recognition experiments demonstrated high affinity and selectivity towards 2,4-DCP over structurally related phenolic compounds. In addition, MMIPs could be regenerated, and their adsorption capacity in the fifth use was about 7.53% loss in 2,4-DCP solution. The MMIPs as-prepared were successfully applied to the separation of 2,4-DCP from environmental water samples. ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science/article/pii/S1385894711009922 [article] Magnetic molecularly imprinted polymers based on attapulgite / Fe3O4 particles for the selective recognition of 2,4 - dichlorophenol [texte imprimé] / Jianming Pan, Auteur ; Longcheng Xu, Auteur ; Jiangdong Dai, Auteur . - 2012 . - pp.68-75. Génie chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 174 N° 1 (Octobre 2011) . - pp.68-75 Mots-clés : Surface imprinted polymers Selective recognition 2,4-Dichlorophenol Attapulgite /Fe3O4 magnetic particles Magnetic susceptibility Résumé : Via encapsulation of attapulgite/Fe3O4magneticparticles (ATP/Fe3O4), the magneticmolecularlyimprintedpolymers (MMIPs) were synthesized for the selective recognition of 2,4-dichlorophenol (2,4-DCP). MMIPs were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) analysis, thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), transmission electron microscopy (TEM), nitrogen adsorption–desorption analysis and Raman spectroscopy. MMIPs were demonstrated claviform shape with an imprintedpolymer film (thickness of about 16 nm), and exhibited magnetic property (Ms = 5.67 emu g−1) and thermal stability. Batch mode adsorption studies were carried out to investigate the specific binding capacity, binding kinetics and recognition specificity. The Langmuir isotherm model was fitted to the equilibrium data better than the other models, and the monolayer adsorption capacity of MMIPs were 145.79 mg g−1 at 298 K. The kinetic properties of MMIPs were well described by the pseudo-second-order equation, initial adsorption rate and half-adsorption time. The selective recognition experiments demonstrated high affinity and selectivity towards 2,4-DCP over structurally related phenolic compounds. In addition, MMIPs could be regenerated, and their adsorption capacity in the fifth use was about 7.53% loss in 2,4-DCP solution. The MMIPs as-prepared were successfully applied to the separation of 2,4-DCP from environmental water samples. ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science/article/pii/S1385894711009922

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