为了改善CeO₂纳米粒子单独使用时较严重的团聚现象，在超声作用下将CeO₂与多壁碳纳米管（MWCNTs）形成复合材料，并利用SEM、Raman、XRD等方法对材料进行表征，发现CeO₂纳米粒子具有明显的分散效果。将复合材料修饰到玻碳电极上（GCE）构建检测磺胺甲(口恶)唑（Sulfamethoxazole，SMX）的电化学传感器。对检测条件如pH、支持电解质、修饰材料使用量等进行优化。在优化条件下通过LSV法对SMX进行电化学分析，结果表明，该电极具有良好的选择性、稳定性，实际样品检测中回收率为88.3%~107.8%。

In order to reduce the serious agglomeration of CeO₂ nanoparticles when they are used alone,CeO₂ and multi-walled carbon nanotubes (MWCNTs) form a composite material under the action of ultrasound.The composite is characterized by scanning electron microscope (SEM),Raman,X-ray diffraction (XRD) and other methods.It is found that CeO₂ nanoparticles have a significant dispersion effect.The composite is modified onto the surface of glassy carbon electrode (GCE) to construct an electrochemical sensor for detecting sulfamethoxazole (SMX).Subsequently,optimization experiments are performed on detection conditions such as pH,supporting electrolyte,and the amount of modified materials used.Electrochemical analysis on SMX is performed by LSV method under the optimized conditions.Experimental results show that the electrode has good selectivity,stability and repeatability,by which the recovery rate in actual sample detection is 88.3%-107.8%.

胡华丽(1997-),女,硕士研究生,研究方向为电化学分析,1750670962@qq.com