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Structural Insight into Stabilization of Pickering Emulsions with Fe3O4@SiO2 Nanoparticles for Enzyme Catalysis in Organic Media
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Yanning Qu Renliang Huang Wei Qi Qi Qu Rongxin Su Zhimin He 《Particle & Particle Systems Characterization》2017,34(7)
Encapsulation of enzymes with enhanced activity and recyclability in water‐in‐oil Pickering emulsions is a simple and efficient method for their immobilization; however, the effect produced by the structure of colloidal particles on the stabilization of the Pickering emulsion for enzyme catalysis has not been investigated in detail. In this study, four types of hydrophobic Fe3O4@SiO2 nanoparticles (NPs) with similar chemical compositions, particle diameters, but different surface characteristics have been prepared and utilized for enzyme encapsulation in various water‐in‐oil magnetic Pickering emulsions, after which the relationship between NPs structure, size of emulsions droplets, and enzyme activity is examined. The obtained results indicate that (i) the more hydrophobic Fe3O4@SiO2 NPs cause the higher enzyme activity; (ii) the higher hydrophobicity of oil phase also increases the enzyme activity, especially for Fe3O4@w‐SiO2 NPs which form in the solvent of water. The results are mainly attributed to the higher specific surface area of emulsion droplets and interfacial mass transfer of substrates through the interfaces of droplets. The reported data provide new insights into the mechanism of stabilization of Pickering emulsions for enhancing enzyme activity and demonstrate efficient theoretical references for enzyme immobilization and synthesis of stable and active biocatalysts with high recyclability. 相似文献
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Magnetic Nanoparticles: Uptake and Intracellular Fate of Peptide Surface‐Functionalized Silica Hybrid Magnetic Nanoparticles In Vitro (Part. Part. Syst. Charact. 2/2015)
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Reinaldo G. Digigow Dimitri Vanhecke Barbara Rothen‐Rutishauser Martin J.D. Clift Alke Petri‐Fink 《Particle & Particle Systems Characterization》2015,32(2):135-135
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Iron Oxide Nanoparticles: Facile Synthesis of Gd(OH)3‐Doped Fe3O4 Nanoparticles for Dual‐Mode T1‐ and T2‐Weighted Magnetic Resonance Imaging Applications (Part. Part. Syst. Charact. 10/2015)
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Hongdong Cai Xiao An Shihui Wen Jingchao Li Guixiang Zhang Xiangyang Shi Mingwu Shen 《Particle & Particle Systems Characterization》2015,32(10):918-918
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Colorimetric Detection: Synthesis of RGO/Cu8S5/PPy Composite Nanosheets with Enhanced Peroxidase‐Like Activity for Sensitive Colorimetric Detection of H2O2 and Phenol (Part. Part. Syst. Charact. 3/2017)
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Yanzhou Jiang Yan Gu Guangdi Nie Maoqiang Chi Zezhou Yang Ce Wang Yen Wei Xiaofeng Lu 《Particle & Particle Systems Characterization》2017,34(3)