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Synthesis of mesoporous silica KIT-6 microspheres with single-crystalline mesostructure
Received date: 2022-01-19
Online published: 2022-07-14
Single-crystalline mesoporous silica KIT-6 microspheres were synthesized using complex micelles formed by nonionic surfactant（polyethylene oxide（PEO）-polypropylene oxide （PPO）-polyethylene oxide，P123） and cationic polyelectrolyte（poly dimethyldiallyl ammonium chloride，PAC） as templates.The morphology and pore structure of the synthesized materials were characterized by scanning electron microscope（SEM），transmission electron microscope（TEM），X-ray diffraction（XRD），nitrogen physical adsorption and thermogravimetric analysis（TGA）.The results showed that the mesoporous KIT-6 silica material synthesized with the organic complex micelles as templates had regular spherical morphology and particle diameter of 2~3 μm.It had a large specific surface area and pore volume（747 m2/g and 1.3 cm3/g） and the mesoporous pore size was 8.5 nm.Within the whole KIT-6 particle，the alignment of mesopores exhibited long-range order.Due to the strong interaction between long-chain polyelectrolyte PAC and the silicon source，the samples were synthesized at a relatively high hydrothermal temperature（160 ℃），which was helpful to improve the stability of the mesoscopic structure.This synthesis method had some enlightening significance for the synthesis of mesoporous silica KIT-6 single crystal microspheres and their applications in the fields of catalysis，adsorption and separation.
Meihua HONG , Guanfeng LIU , Yupeng GONG , Liqing LI , Tiehong CHEN . Synthesis of mesoporous silica KIT-6 microspheres with single-crystalline mesostructure[J]. Inorganic Chemicals Industry, 2022 , 54(7) : 149 -156 . DOI: 10.19964/j.issn.1006-4990.2022-0035
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