期刊
APPLIED SURFACE SCIENCE
卷 360, 期 -, 页码 889-895出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.11.081
关键词
Magnesium silicate; Mesostructure; Hydrothermal method; Mesoporous template
类别
资金
- National Natural Science Foundation of China [51202103]
- Research Foundation for the Doctoral Program of Higher Education of China [20121501120005]
- Special Program of the Postdoctoral Science Foundation of China [2013T60271]
- Program for the Youth Science and Technology Talents of Inner Mongolia [NJYT-14-1302]
Mesoporous materials with unique structure as well as special morphology have potential applications in pollutant adsorption. In this work, using mesoporous silica SBA-15 filled with carbon (C@SBA-15) as both silicon source and assisted template, the ordered mesoporous magnesium silicate (Mg3Si4O9(OH)(4)) has been fabricated at 140 degrees C by a novel and facile hydrothermal method. During the hydrothermal process, the magnesium silicate grew along the silica walls at the expense of consuming silica and deposited on the carbon surface of the C@SBA-15. Meanwhile, the rigid carbon inside the pores of the SBA-15 supported the magnesium silicate as mesoporous walls under hydrothermal condition. The obtained magnesium silicate possessed ordered mesoporous structure, high specific surface area of 446 m(2)/g, large pore volume of 0.84 cm(3)/g, and hierarchical structure assembled with ultrathin nanosheets of 15 nm in thickness. These characteristics endow the ordered mesoporous magnesium silicate with the fast adsorption rate and high adsorption capacity of 382 mg/g for methylene blue. In addition, this synthesis method opens a new approach to fabricate other ordered mesoporous silicates. (C) 2015 Elsevier B.V. All rights reserved.
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