氮掺杂碳纳米管的制备及其在铅离子检测中的应用

摘要

制备了氮掺杂改性的碳纳米管(CNx),并对其进行了扫描电子显微镜(Scanning Electron Microscopy, SEM)和X射线衍射仪(XRD, X-Ray Diffraction)表征。利用循环伏安法测定了铅离子在氮掺杂碳纳米管修饰电极上的电化学行为。结果表明,氮掺杂碳纳米管修饰电极对铅离子有明显的电催化行为,而且它在铅离子检测中的效果明显优于裸的玻碳电极。在拟定条件下,氮掺杂碳纳米管修饰电极对铅离子的检测限为0.06µmol/L,线性范围为0.06∼0.1µmol/L,并且具有良好的稳定性与重复性,因而该电极具有良好的应用前景。%The nitrogen-doped carbon nanotubes modified (CNx) was prepared, and characterized by the SEM and XRD. The lead ions electrochemical behavior in the CNx electrode was determined by cyclic voltammetry (CV). The experimental results indicated that CNx electrode acted on lead ions with electro-catalytic behavior, and the current response of CNx electrode was superior to that of the bare glassy carbon electrode for lead ions. Under proposed conditions, the CNx electrode detection limit of lead ion was 0.06 µmol/L, linear range 0.06—0.1 µmol/L, and CNx electrode has good stability and repeatability, with good application prospects.