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Effect of concentration of aminopropyl groups on the surface of MCM - 41 on adsorption of Cu2+ / Manu Vasudevan in Industrial & engineering chemistry research, Vol. 50 N° 19 (Octobre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp. 11432-11439 Titre : Effect of concentration of aminopropyl groups on the surface of MCM - 41 on adsorption of Cu2+ Type de document : texte imprimé Auteurs : Manu Vasudevan, Auteur ; Praful L. Sakaria, Auteur ; Adarsh S. Bhatt, Auteur Année de publication : 2011 Article en page(s) : pp. 11432-11439 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Adsorption Résumé : MCM-41 synthesized at room temperature was functionalized with aminopropyltrimethoxysilane (APTMS). The functionalized MCM-41 were characterized by powder X-ray diffraction, scanning electron micrography (SEM), transmission electron-microscopy (TEM), nitrogen adsorption―desorption, and carbon, nitrogen, and hydrogen (CHN) analysis. X-ray diffraction patterns indicate that the modified materials retain the structure of MCM-41. An increase in surface concentration of aminopropyl groups (0.7 to 1.9 mmol/g) resulted in a decrease in the surface area, BJH pore size, and total pore volume. Studies on the adsorption of Cu2+ on these samples showed the Langmuir type adsorption isotherms. The value of the Langmuir monolayer capacity of Cu2+ adsorption increased linearly with an increase in the surface concentration of the amino group. The NH2/Cu2+ mole ratio increased from ∼1.5 to ∼2 when the concentration of the amino group increased from 0.71 to 1.42 mmol/g and remained almost the same for higher concentrations. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24573339 [article] Effect of concentration of aminopropyl groups on the surface of MCM - 41 on adsorption of Cu2+ [texte imprimé] / Manu Vasudevan, Auteur ; Praful L. Sakaria, Auteur ; Adarsh S. Bhatt, Auteur . - 2011 . - pp. 11432-11439. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp. 11432-11439 Mots-clés : Adsorption Résumé : MCM-41 synthesized at room temperature was functionalized with aminopropyltrimethoxysilane (APTMS). The functionalized MCM-41 were characterized by powder X-ray diffraction, scanning electron micrography (SEM), transmission electron-microscopy (TEM), nitrogen adsorption―desorption, and carbon, nitrogen, and hydrogen (CHN) analysis. X-ray diffraction patterns indicate that the modified materials retain the structure of MCM-41. An increase in surface concentration of aminopropyl groups (0.7 to 1.9 mmol/g) resulted in a decrease in the surface area, BJH pore size, and total pore volume. Studies on the adsorption of Cu2+ on these samples showed the Langmuir type adsorption isotherms. The value of the Langmuir monolayer capacity of Cu2+ adsorption increased linearly with an increase in the surface concentration of the amino group. The NH2/Cu2+ mole ratio increased from ∼1.5 to ∼2 when the concentration of the amino group increased from 0.71 to 1.42 mmol/g and remained almost the same for higher concentrations. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24573339