New Polysiloxane Surfaces Modified with <i>ortho-, meta-</i>or <i>para</i>-Nitrophenyl Receptors for Copper Adsorption  

作　　者：Smaail Radi Nouraddine Basbas Said Tighadouini Maryse Bacquet 

机构地区：[1]LCAE Faculté des Sciences Université Med I, Oujda, Morocco [2]LCAE Faculté des Sciences Université Med I, Oujda, Morocco Centre de l’Oriental des Sciences et Technologies de l’Eau (COSTE), Université Mohamed I, Oujda, Morocco [3]Université des Sciences et Technologies de Lille, UMET: Unité Matériaux et Transformations UMR8207, Equipe Ingénierie des Systèmes Polymères, Villeneuve d’Ascq, France

出　　处：《Journal of Surface Engineered Materials and Advanced Technology》2014年第1期21-28,共8页表面工程材料与先进技术期刊（英文）

摘　　要：Porous SiO2 has been chemically modified with functional ortho-, meta- or para-nitrophenyl moieties using the heterogeneous route. This synthetic route involved the reaction of carbaldehyde derivatives with 3-aminopropyl trimethoxysilane prior to immobilization on the support. The new modified surfaces have been characterized by elemental analysis, FT-IR, 13C NMR of the solid state, nitrogen adsorption-desorption isotherm, BET surface area, B.J.H. Pore sizes, thermogravimetry curves (TGA) and scanning electron microscope (SEM). The new materials exhibit good chemical and thermal stability. These products were employed as a Cu(II) adsorbent from aqueous solutions at room temperature using the batch technique. Flame atomic absorption spectrometry was used to determine the Cu(II) concentration in the filtrate after the adsorption process. The results indicate that under the optimum conditions, the maximum adsorption value for Cu(II) was 20.0 mg Cu(II) g-1 modified silica, whereas the adsorption capacity of the unmodified silica was only 1.0 mg Cu(II) g-1 silica. On the basis of these results, it can be concluded that it is possible to modify chemically SiO2 with functional groups and use it as adsorbents for metals in aqueous media.Porous SiO2 has been chemically modified with functional ortho-, meta- or para-nitrophenyl moieties using the heterogeneous route. This synthetic route involved the reaction of carbaldehyde derivatives with 3-aminopropyl trimethoxysilane prior to immobilization on the support. The new modified surfaces have been characterized by elemental analysis, FT-IR, 13C NMR of the solid state, nitrogen adsorption-desorption isotherm, BET surface area, B.J.H. Pore sizes, thermogravimetry curves (TGA) and scanning electron microscope (SEM). The new materials exhibit good chemical and thermal stability. These products were employed as a Cu(II) adsorbent from aqueous solutions at room temperature using the batch technique. Flame atomic absorption spectrometry was used to determine the Cu(II) concentration in the filtrate after the adsorption process. The results indicate that under the optimum conditions, the maximum adsorption value for Cu(II) was 20.0 mg Cu(II) g-1 modified silica, whereas the adsorption capacity of the unmodified silica was only 1.0 mg Cu(II) g-1 silica. On the basis of these results, it can be concluded that it is possible to modify chemically SiO2 with functional groups and use it as adsorbents for metals in aqueous media.

关 键 词：MODIFIED SURFACES Chemical Synthesis Characterization ADSORPTION Cu(II) 

分 类 号：O6[理学—化学]