氮化碳/碳纳米管复合材料的制备及其在铅离子检测中的应用

Preparation of C_3N_4/CNTs Electrode and Its Application for the Determination of Lead Ion

用乙二胺和四氯化碳为原料,混合加入碳纳米管,成功制备了氮化碳/碳纳米管复合材料(C3N4/CNTs),并进行了XRD和TEM表征。该复合材料修饰的电极在铅离子的检测中效果明显优于裸的玻碳电极和CNTs修饰的电极。在优化条件下,测得修饰电极灵敏度为270.3μAmol-1L,线性范围0.8到120 nmol L-1,有良好的应用前景。

C3N4/CNTs were successfully prepared by reaction of ethanediamine and carbon tetrachloride in the presence of CNTs.The morphology and composition of the prepared samples were characterized by infrared spectroscopy,X-ray photoelectron spectroscopy,transmission electron microscopy.The experimental results indicate that the current response of the C3N4/CNTs electrode is superior to that of the bare glassy carbon electrode and CNTs electrode for Pb2＋ determination.Under the optimal conditions,the current response of the C3N4/CNTs film-modified electrode to Pb（II） is linear in the range of 0.8-120 nmol L-1（R=0.9970）,and the sensitivity is 270.3 μA mol-1L with a good application prospects.