Journal
MATERIALS LETTERS
Volume 119, Issue -, Pages 150-153Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2014.01.005
Keywords
Amorphous materials; Porous materials; Diatomite; Synthesis; MCM-41; Ionic liquid
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Mesoporous silica materials were synthesized using diatomite as silica source and ionic liquid 1-hexadecyl-3-methylimidazolium bromide ([C(16)mim]Br) as the template. The effects of various experimental parameters, such as molar ratio of [C(16)mim]Br/SiO2, pH value, reaction temperature and time, were systematically investigated. The obtained samples were further characterized by X-ray powder diffraction, nitrogen absorption-desorption analyses and transmission electron microscopy. The results indicated that as-synthesized mesoporous materials possessed the ordered hexagonal mesostructure and high surface area, as well as demonstrated that ionic liquid [C(16)mim]Br was a suitable template. More favorably, as an alternative and inexpensive source of silica, diatomite could significantly reduce the cost of preparation. (C) 2014 Elsevier B.V. All rights reserved.
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