Low-cost preparation of mesoporous silica with high pore volume

Shuling Shen1), Wei Wu2), Kai Guo1), and Jianfeng Chen1, 2) 1) Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China 2) Key Laboratory of the Ministry of Education for Nanomaterials, Beijing University of Chemical Technology, Beijing 100029, China

摘 要：Mesoporous silica materials with high pore volume were successfully prepared by the chemical precipitation method, with water glass and a biodegradable nonionic surfactant polyethylene glycol （PEG）. The obtained materials were characterized by trans-mission electron microscopy （TEM）, scanning electron microscopy （SEM）, thermo gravimetric analyzer and differential scanning calorimetry （TG-DSC）, nitrogen adsorption-desorption measurements, and X-ray diffraction （XRD）. The results showed that the changes of the pore parameters depended on both the surfactant content and heat treatment temperature. When the content of PEG was 10wt/ and the obtained PEG/SiO2 composite was heated at 600°C, the mesoporous silica with a pore volume of 2.2 cm3/g, a BET specific surface area of 361.55 m2/g, and a diameter of 2-4 μm could be obtained. The obtained mesoporous silica materials have po-tential applications in the fields of paint and plastic, as thickening, reinforcing, and flatting agents.

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