Preparation of hollow silica nanospheres in O/W microemulsion system by hydrothermal temperature changes |
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| Institution: | 1. Key Laboratory of Fine Chemicals in Universities of Shandong, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan 250353, Shandong, PR China;2. School of Chemical Engineering and Environment, Weifang University of Science and Technology, Weifang 262700, PR China;1. Queensland Micro, and Nanotechnology Centre, Griffith University, Nathan Campus, 4111, Australia;2. Griffith School of Engineering and Built Environment, Griffith University, Nathan Campus, 4111, Australia;3. Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM, Fudan University, Shanghai 200092, PR China;4. School of Environment and Science, Environmental Futures Research Institute, Griffith University, Gold Coast Campus, 4222, Australia;5. Griffith Institute for Drug Discovery, Griffith University (Brisbane Innovation Park), Nathan Campus, 4111, Australia;6. School of Chemical Engineering, The University of Queensland, Brisbane 4072, Australia;1. Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China;2. Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07, Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan |
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| Abstract: | Hollow silica nanospheres with wrinkled or smooth surfaces were successfully fabricated through a hydrothermal method. In this method, oil-in-water microemulsion (composed of cyclohexane, water, ethanol, and cetyltrimethylammonium bromide), and polyvinylpyrrolidone were utilized as template and capping agent, respectively. In such a facile synthesis, we can well realize the morphological transformation of spheres with radially oriented mesochannels to hollow structures of silica nanoparticle only by regulating the hydrothermal temperature from 100 °C to 200 °C. Synthesized samples with different mesostructures were then used as supports to immobilize Candida rugosa lipase (CRL). The immobilized CRL was employed as a new biocatalyst for biodiesel production through the esterification of heptanoic acid with ethanol. The conversion ratio of heptanoic acid with ethanol catalyzed by the immobilized CRL was also evaluated. Results of this study suggest that the prepared samples have potential applications in biocatalysis. |
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| Keywords: | Hollow silica sphere O/W microemulsion Immobilized lipase Biocatalysis Esterification |
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