Synthesis and characterization of imidazole-functionalized SBA-15 as an adsorbent of hexavalent chromium

被引：104
作者：
Li, Junning
Qi, Tao
Wang, Lina
Liu, Changhou
Zhang, Yi
机构：
[1] Dalian Univ Technol, Sch Chem Engn, Dalian 116012, Peoples R China
[2] Chinese Acad Sci, Inst Proc Engn, Lab Green Proc Engn, Beijing 100080, Peoples R China
来源：
MATERIALS LETTERS | 2007年 / 61卷 / 14-15期
基金：
中国国家自然科学基金;
关键词：
mesoporous; functionalization; adsorption; imidazole; hexavalent chromium;
D O I：
10.1016/j.matlet.2006.11.079
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Mesoporous SBA-15 was functionalized with imidazole groups by a facile two-step post-grafting method. The resultant material has been characterized by powder X-ray diffraction, N-2 adsorption/desorption measurements, FT-IR, NMR and elemental analysis to confirm the ordered mesoporous structure and the functionalization of the imidazole groups and employed as an adsorbent of Cr(VI) from aqueous solutions at room temperature. It was showed that the imidazole group can be introduced into the mesoporous channel by the postsynthesis route with high content under controlled reaction conditions. The imidazole-functionalized material exhibits high adsorption capacity of 113 mg/g for Cr(VI) and fast adsorption rate of less than 1 h in aqueous solutions. Equilibrium data were well fitted to the Langmuir adsorption isotherms. (c) 2006 Elsevier B.V. All rights reserved.
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页码：3197 / 3200
页数：4
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