个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:中科院金属所
学位:博士
所在单位:化工学院
学科:无机化学
办公地点:大连理工大学化学楼401
联系方式:13940825088
电子邮箱:cgmeng@dlut.edu.cn
Preparation and morphology control of magnetic mesoporous silica via metalorganic amphiphiles self-assembly
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论文类型:期刊论文
发表时间:2013-05-01
发表刊物:MICROPOROUS AND MESOPOROUS MATERIALS
收录刊物:SCIE、EI
卷号:171
页面范围:94-102
ISSN号:1387-1811
关键字:Magnetic; Mesoporous silica; Metalorganic amphiphiles; Self-assembly; Adsorption
摘要:A facile method, which was based on the cationic surfactant self-assembly and oxidation, was designed to fabricate magnetic mesoporous silica (MMS). Three types of metalorganic amphiphiles with a terminal ferrocene moiety were synthesized and used as structure-directing agents and iron source to prepare magnetic mesoporous silica. Among all the surfactants, FcC(11)PyBr (11-[(ferrocenyl carbonyl)oxy]-undecyl pyridinium bromide) exhibited the best ability to produce mesopores with tetraethoxysilane at a suitable molar ratio. Using FcC(11)PyBr as the structure-directing agent, it was also easy to control the morphology of MMS, which was turned from irregular powder to smooth sphere. After the oxidation reaction at 573 K, the MMS material showed an obvious magnetic property, with a large surface area and pore volume. The MMS was characterized by X-ray diffraction, N-2 adsorption-desorption isotherms, SEM, TEM, SQUID magnetometry and X-ray photoelectron spectrometry. The MMS was found to have a good absorptivity and used as magnetic adsorbent to remove some dye pollutants in water. (C) 2012 Elsevier Inc. All rights reserved.