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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.