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• W956811192 abstract "Surface NH2-functionalized SBA-15 mesoporous silica was synthesized using toluene diisocyanate (TDI) as a bridge molecule. First, the surface Si-OH groups of SBA-15 were reacted with the -NCO groups of TDI. Then, the remaining unreacted -NCO groups of TDI were reacted with the -NH2 groups of ethylenediamine (EDA). Finally, the NH2-groups were successfully grafted onto the mesoporous SBA-15 surface by the above two-step method. XRD, N2 adsorption-desorption analysis, FT-IR, and 29Si MAS NMR were used to identify the well-ordered structure and the successful incorporation of the -NH2 groups onto the surface of the synthesized materials. Characterizations revealed that such -NH2 grafting is an effective method to obtain a high loading of -NH2 groups onto the SBA-15. When subjected to toxic heavy metal ions in aqueous solution, the obtained NH2-functionalized SBA-15 showed very high adsorption rates 99.9%, 99.7%, 99.8%, 99.5% and 99.9% for Pb2+, Cr3+, Cd2+, Ag+ and the Cu2+, respectively, which is attributed to the strong complexation reactions between the metal ions and the grafted -NH2 groups." @default.
• W956811192 created "2016-06-24" @default.
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• W956811192 date "2012-12-01" @default.
• W956811192 modified "2023-10-14" @default.
• W956811192 title "Ordered SBA-15 mesoporous silica with high amino-functionalization for adsorption of heavy metal ions" @default.
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• W956811192 doi "https://doi.org/10.1007/s11434-012-5594-0" @default.
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