A novel pathway for the synthesis of ordered mesoporous silica from diatomite

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• 作者：Zhihui Yu ; Yu Wang ; Xiaoyu Liu ; Jiangbo Sun ; Guangyan Sha ; Jinhui Yang ; Changgong Meng
• 关键词：Amorphous materials ; Porous materials ; Diatomite ; Synthesis ; MCM-41 ; Ionic liquid
• 刊名：Materials Letters
• 出版年：15 March, 2014
• 年：2014
• 卷：119
• 期：Complete
• 页码：150-153
• 全文大小：1082 K

文摘

Mesoporous silica materials were synthesized using diatomite as silica source and ionic liquid 1-hexadecyl-3-methylimidazolium bromide ([C₁₆mim]Br) as the template. The effects of various experimental parameters, such as molar ratio of [C₁₆mim]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 [C₁₆mim]Br was a suitable template. More favorably, as an alternative and inexpensive source of silica, diatomite could significantly reduce the cost of preparation.