Preparation, characterization, and highly effective mercury adsorption of -cysteine-functionalized mesoporous silica

A novel l -cysteine-functionalized mesoporous SBA-15 (SH-SBA-15) material was synthesized by an easy two-step post-grafting method of l -cysteine using poly(ethylene glycol)- block -poly(propylene glycol)- block -poly(ethylene glycol) as a template under acidic conditions. The material maintained it...

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Bibliographic Details
Published in:New journal of chemistry 2013-12, Vol.38 (1), p.248-254
Main Authors: Li, Qing, Wang, Zheng, Fang, Dong-Mei, Qu, Hai-yun, Zhu, Yan, Zou, Hui-jun, Chen, Yi-rui, Du, Yi-Ping, Hu, Hui-lian
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Summary:A novel l -cysteine-functionalized mesoporous SBA-15 (SH-SBA-15) material was synthesized by an easy two-step post-grafting method of l -cysteine using poly(ethylene glycol)- block -poly(propylene glycol)- block -poly(ethylene glycol) as a template under acidic conditions. The material maintained its well-ordered mesostructure after two-step modification as confirmed by powder X-ray diffraction and transmission electron microscopy analyses. X-ray photoelectron spectroscopy and 13 C cross-polarization/magic angle spinning NMR revealed that l -cysteine was successfully introduced into SBA-15. The material showed excellent mercury adsorption capacity (429 mg g −1 ) at room temperature and mercury uptake time (
ISSN:1144-0546
1369-9261
DOI:10.1039/c3nj00799e