Rapid synthesis of tunable-structured short-pore SBA-15 and its application on CO2 capture
The well-ordered hexagonal short-pore SBA-15 (SSBA-15) has been successfully synthesized via an energy-efficient process under the microwave-hydrothermal condition, in which the formation duration [stirring duration (ripening step) and microwave-hydrothermal treatment duration (aging step)] has been greatly decreased from 48 h for conventional hydrothermal treatment to <2 h. The extension of the ripening duration led to the evidently improved uniformity and regularity of particles while the increase of aging duration resulted in less intrawall pores and more structural mesopores. The optimal condition to get highly ordered SSBA-15 in this work was the duration of 2 h for both steps, and the SSBA-15 obtained was composed of cuboid-like particles, whose pore length was ca. 450 ± 50 nm and pore size was around 10 nm. The SSBA-15 was modified with different amine agents to prepare solid amine adsorbent, the obtained adsorbents showed considerable CO 2 adsorption ability, indicating that this fast-prepared SSBA-15 can be a promising support of CO 2 adsorbents.
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