(西北工業(yè)大學(xué) 材料學(xué)院，西安 710072)
摘 要: 采用水熱法制備碳納米管(MWCNT)/四氧化三鐵(Fe3O4)復(fù)合材料，運(yùn)用透射電子顯微鏡(TEM)、X射線衍射(XRD)、傅立葉紅外吸收光譜(FTIR)、振動(dòng)樣品磁強(qiáng)計(jì)(VSM)以及循環(huán)伏安法等對復(fù)合材料的微觀結(jié)構(gòu)、磁性能以及電化學(xué)行為進(jìn)行研究和分析。結(jié)果表明：在MWCNT/Fe3O4復(fù)合材料中，磁性Fe3O4納米顆粒能夠?qū)WCNTs表面較好的包覆，實(shí)現(xiàn)了Fe3O4對MWCNTs的表面修飾；Fe3O4含量(質(zhì)量分?jǐn)?shù))為62.5%的復(fù)合材料容易被磁化，常溫下其飽和磁化強(qiáng)度(Ms)為35.89 A·m2/kg，矯頑力(Hc)為0.19 A/m，表現(xiàn)出良好的順磁性；MWCNTs/Fe3O4修飾玻碳(GC)電極對H2O2的電化學(xué)響應(yīng)具有良好的促進(jìn)作用，使其氧化還原過電位升高，氧化峰值電流顯著增強(qiáng)。
關(guān)鍵字: 碳納米管；四氧化三鐵；磁性能；電催化性能
（School of Materials and Engineering Science, Northwestern Polytechnical University, Xi’an 710072, China）
Abstract:Multi-walled carbon nanotube (MWCNT)/Fe3O4 composites were prepared via a chemical synthesis-hydrothermal treatment method. The microstructure, magnetic and electrocatalytic properties of MWCNT/Fe3O4 were investigated using transmission electron microscope (TEM), X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), vibrating sample magnetometer (VSM) and cyclic voltammograms method. The results indicate that the surfaces of MWCNTs are enwrapped with magnetic Fe3O4 nanoparticles, and the as-prepared MWCNT/Fe3O4 composites (62.5% Fe3O4) with saturation magnetization (Ms) of 35.89 A·m2/kg and coercive force (Hc) of 0.19 A/m have good paramagnetism at room temperature. The glass-carbon (GC) electrode modified with MWCNT/ Fe3O4 has good electrocatalytic response towards H2O2, and the redox overpotential increases and the oxidation peak current enhances.
Key words: multi-walled carbon nanotube (MWCNT); Fe3O4 nanoparticles; magnetic property; electrocatalytic property
