科研之友
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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.
