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Pore Controllable Regulation and Laccase Immobilization of Hollow Mesoporous SiO2/Fe3O4 Microspheres

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Abstract:

Hollow magnetic mesoporous SiO2/Fe3O4 microspheres with different mesopore sizes were synthesized by a simple multi-step solution growth process. In the experiment of coating mesoporous SiO2, cetyltrimethylammonium bromide (CTAB) was used as surfactant and two swelling agents, decane and 1, 3, 5-trimethylbenzene (TMB), were used as swelling agents alone or together with different sequence. The results showed that the magnetic mesoporous SiO2/Fe3O4 microspheres have a saturation magnetization of 13.6 emu·g-1 and a low coercivity (50 Oe). Different adding form of swelling agents had great effect on the microstructure of mesoporous SiO2/Fe3O4 microspheres. The mesoporous SiO2/Fe3O4 microspheres obtained by using two swelling agents together had better mesoporous properties. The mesoporous SiO2/Fe3O4 microspheres exhibited high surface area (850 m2·g-1), large peak pore (3.11 nm), high pore volume (1.23 cm3·g-1). Moreover, the composite microspheres had larger adsorption amount (276 mg/g) and quicker adsorption rate (0.178 g/ (mg·h)) of laccase.

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Dianchi Advanced Materials Forum 2013 View Preview

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Periodical:

Advanced Materials Research (Volume 833)

Pages:

93-98

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.833.93

Citation:

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Online since:

November 2013

Authors:

Qun Yan Li*, Qing Qiang Zhu, Qi Wei, Zuo Ren Nie

Keywords:

Decane, Laccase, Magnetic Mesoporous SiO2, TMB

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* - Corresponding Author

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