Molecules | |
Gold Nanoparticles on Mesoporous SiO2-Coated Magnetic Fe3O4 Spheres: A Magnetically Separatable Catalyst with Good Thermal Stability | |
Huan Liu4  Chao Lin3  Zhen Ma2  Hongbo Yu1  | |
[1] Ningbo Institute of Materials Engineering and Technology, Chinese Academy of Sciences, Ningbo 315201, China;Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China;Department of Physics, Faculty of Science, Ningbo University, Ningbo 315211, China;Research Institute of Applied Catalysis, Shanghai Institute of Technology, Shanghai 201418, China | |
关键词:
solvothermal method;
magnetic Fe3O4 spheres;
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DOI : 10.3390/molecules181114258 | |
来源: mdpi | |
【 摘 要 】
Fe3O4 spheres with an average size of 273 nm were prepared in the presence of CTAB by a solvothermal method. The spheres were modified by a thin layer of SiO2, and then coated by mesoporous SiO2 (m-SiO2) films, by using TEOS as a precursor and CTAB as a soft template. The resulting m-SiO2/Fe3O4 spheres, with an average particle size of 320 nm, a high surface area (656 m2/g), and ordered nanopores (average pore size 2.5 nm), were loaded with gold nanoparticles (average size 3.3 nm). The presence of m-SiO2 coating could stabilize gold nanoparticles against sintering at 500 °C. The material showed better performance than a conventional Au/SiO2 catalyst in catalytic reduction of
【 授权许可】
CC BY
© 2013 by the authors; licensee MDPI, Basel, Switzerland.
【 预 览 】
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