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A magnetic mesoporous SiO2/Fe3O4 hollow microsphere with a novel network-like composite shell: synthesis and application on laccase immobilization

  • Original Paper: Nano-structured materials (particles, fibers, colloids, composites, etc.)
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Abstract

The magnetic mesoporous SiO2/Fe3O4 hollow microspheres, which have a unique network-like shell constructed with magnetic Fe3O4 nanorods and mesoporous SiO2, were successfully prepared by the co-condensation of tetraethoxysilane in the presence of cetyltrimethylammonium bromide and 1,3,5-triisopropylbenzene. The composite microspheres were utilized as supports for laccase immobilization. The composite microsphere has high surface area (772 m2 g−1) and large pore volume (0.83 cm3 g−1). The obtained microspheres exhibit relatively high saturated magnetization (13.6 emu g−1). The composite mesoporous microspheres used to immobilize laccase as support have a notable laccase immobilization (689 mg g−1) for per gram pure mesoporous SiO2 in the composite microspheres, which is much larger than those reported in the literature. The activity of immobilized laccase has good pH stability and thermal stability. It is further demonstrated that the immobilized laccase exhibited a good catalytic performance when they were used to react with the 2,4-dichlorophenol solution. The degradation rate and removal rate of the 2,4-dichlorophenol is 52.31 and 81.64 %, respectively.

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Acknowledgments

We are grateful for the support of National Science Foundation of China (Grant No. 51402007), and the Scientific Plan Program of Beijing Municipal Education Commission (KM201210005012).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing, 100124, People’s Republic of China

    Qun-Yan Li, Peng-Yan Wang, Yun-Lu Zhou, Zuo-Ren Nie & Qi Wei

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  1. Qun-Yan Li
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  2. Peng-Yan Wang
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Correspondence to Qun-Yan Li.

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Li, QY., Wang, PY., Zhou, YL. et al. A magnetic mesoporous SiO2/Fe3O4 hollow microsphere with a novel network-like composite shell: synthesis and application on laccase immobilization. J Sol-Gel Sci Technol 78, 523–530 (2016). https://doi.org/10.1007/s10971-016-3967-6

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  • DOI: https://doi.org/10.1007/s10971-016-3967-6

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