Decoration of CNTs’ surface by Fe₃O₄ nanoparticles: Influence of ultrasonication time on the magnetic and structural properties

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• 作者：Rui Yu^a ; ^b ; Cheng-Fa Jiang^a ; Wei Chu^a ; Mao-Fei Ran^c ; ^{murphy_ran@foxmail.com} ; Wen-Jing Sun^b ; ^{swj_gdmc@163.com}
• 关键词：CNTs/Fe3O4 ; Superparamagnetism ; Ultrasonication treatment ; Nanocomposite
• 刊名：Chinese Chemical Letters
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：28
• 期：2
• 页码：302-306
• 全文大小：1726 K
• 卷排序：28

文摘

The decoration of CNTs surface by magnetic nanoparticles was achieved by an ultrasonication-assisted hydrothermal method (UAHM). The effect of ultrasonication time on the crystal structure, magnetic performance, and chemical composition of the magnetic CNT composite material was determined. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and vibrating sample magnetometry were used to characterize the physical, chemical, and magnetic properties of the composites. The composites synthesized via the UAHM exhibited superparamagnetic properties. The ultrasonication time was a critical factor that affected the structure and magnetic performance of the composites. By simply controlling the ultrasonication time, the crystal phase structure of Fe oxide could be selectively modulated and the magnetic performance of the MCs could be effectively tuned.