碳纳米管稳定纳米Fe_3O_4的制备及降解染料橙Ⅱ

Synthesis of carbon nanotubes-stabilized nanometer Fe_3O_4 and its degradation of Acid OrangeⅡ

以乙酰丙酮铁(Fe(acac)3)为铁源,水/乙二醇混合溶剂作为还原剂,碳纳米管(CNTs)为纳米四氧化三铁的分散载体,采用溶剂热法原位合成CNTs稳定化纳米Fe3O4。利用X-射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、拉曼光谱(Raman)、傅立叶红外(FTIR)等对CNTs稳定化纳米Fe3O4进行相组成、形貌及结构分析,振动样品磁强计(VSM)对其室温磁性测量。用稳定化纳米Fe3O4催化双氧水降解酸性橙Ⅱ(AOⅡ)染料,研究其催化活性。结果表明,混合溶剂中水的含量能影响Fe3O4在碳纳米管外表面分散的均匀性。室温磁性测量结果显示,分散在CNTs上的Fe3O4表现出超顺磁性。用CNTs稳定化的纳米Fe3O4降解AOⅡ显示出很高的催化活性。

Carbon nanotubes-stabilized（ CNTs） Fe3O4 was synthesized via in situ solvothermal process with carbon nanotubes and iron acetylacetonate（ Fe（ acac）3） in the mixed solution of ethylene glycol/water. CNTsstabilized Fe3O4 were characterized by X-ray powder diffraction（ XRD）,scanning electron microscopy（ SEM）,transmission electron microscopy（ TEM）,Raman spectrometry,fourier transform infrared（ FT-IR） spectrometry,and vibrating sample magnetometer（ VSM）. The result showed that water content in solvent significantly affected the formation and dispersion of Fe3O4 on CNTs. In addition,the magnetic measurement illustrated that the Fe3O4 particles possessed superparamagnetic property at room temperature. The catalytic activity of CNTs-stabilized Fe3O4 was evaluated by decomposing non-biodegradable dye AcidOrange II（ AO II）. The result indicated that CNTs-stabilized Fe3O4 has enhanced catalytic activity.