One step synthesis process for fabricating NiFe2O4 nanoparticle loaded porous carbon spheres by ultrasonic spray pyrolysis |
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Authors: | Jingwu Zheng Feifan Song Shenglei Che Wangchang Li Yao Ying Jing Yu Liang Qiao |
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Affiliation: | 1. College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China;2. Research Center of Magnetic and Electronic Materials, Zhejiang University of Technology, Hangzhou 310014, China |
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Abstract: | In the present work, the porous hollow carbon spheres loaded with NiFe2O4 nanoparticles have been successfully prepared via ultrasonic spray pyrolysis technique at 700?°C and the associated formation mechanism has been studied. The as-prepared NiFe2O4/carbon microspheres with the diameter of about 3–5?µm and the specific surface area of 236.6889?m2?g?1 exhibit good monodispersity and an abundance of mesopores of about 40?nm size. Notably, the 20?nm NiFe2O4 nanoparticles are encapsulated by carbon microspheres and disperse homogeneously inside the carbon matrix. We could tune the relative content of ferrite and carbon sphere via adjusting the composition of the solution used for synthesis and the carbonization temperature. Consequently, some interesting properties can be obtained by combining the magnetic NiFe2O4 nano powder and the electrically conductive porous carbon, which renders the resulting composite suitable for promising applications in electromagnetic wave absorption, treatment of polluted water, catalyst design, energy storage, batteries and so on. |
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Keywords: | Porous hollow carbon spheres Ultrasonic spray pyrolysis Formation mechanism Potential application |
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