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论文类型：期刊论文

发表时间：2014-03-15

发表刊物：MATERIALS LETTERS

收录刊物：SCIE、EI、Scopus

卷号：119

页面范围：150-153

ISSN号：0167-577X

关键字：Amorphous materials; Porous materials; Diatomite; Synthesis; MCM-41; Ionic liquid

摘要：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.