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Synthesis of Amino‐Functionalized Hexagonal Mesoporous Silica for Adsorption of Pb 2+
Author(s) -
Wei Kun,
Shu Lijun,
Guo Wusheng,
Wu Yuan,
Zeng Xiaofeng
Publication year - 2011
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201190042
Subject(s) - chemistry , adsorption , mesoporous material , sorption , desorption , mesoporous silica , hexagonal crystal system , aqueous solution , kinetic energy , nuclear chemistry , inorganic chemistry , chemical engineering , crystallography , organic chemistry , catalysis , physics , quantum mechanics , engineering
Highly ordered amino‐functionalized hexagonal mesoporous silica (HMS‐NH 2 ) had been synthesized successfully by co‐condensation. The resultant materials were characterized by means of XRD, TEM, FT‐IR, N 2 ad‐desorption and 29 Si NMR to confirm the ordered mesoporous structure and the functionalization of the amino groups. The sample was employed as a Pb 2+ adsorbent in aqueous solutions at room temperature. Both Lagergren's first order kinetic model and Lagergren's second order kinetic model were used to describe the adsorption data. It was found that the pseudo second order model fitted the sorption kinetic data better than the pseudo first order model. According to the information analyzed from AAS, HMS‐NH 2 had a Pb 2+ adsorption amount of over 90.7 mg·g −1 , showing a promising application for the treatment of wastewater containing Pb 2+ ions.