Fabrication of microporous hollow silica spheres templated by NP-10 micelles without calcinations |
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Authors: | Xian WangXin-Rui Miao Zhuo-Min LiWen-Li Deng |
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Institution: | College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China |
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Abstract: | We reported a novel method to fabricate hollow silica microspheres using nonionic surfactant nonyl phenol ethoxylated decylether (NP-10) micelles as template, n-octadecane as core and sodium silicate as silica precursor. The core materials were removed by ethanol during the reaction. Hollow structure formed without calcinations or chemical etching. Hierarchical silica hollow microspheres were prepared by changing the concentration of the reactants and reaction time. Size of the core materials was obtained from the temperature-dependent dynamic light scattering (DLS) measurement. Scanning election microscopy (SEM) and transmission electron microscopy (TEM) results revealed that ordered microporous hollow silica microspheres with thickness of shell about 200 nm and mean diameter 2.5 μm were prepared. Porosity and pore size were analyzed by Brunauer-Emmett-Teller (BET). |
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Keywords: | Hollow silica microspheres Template Non-calcination Nonionic surfactant |
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