纳米金上的三维自组装膜及其在重金属检测中的应用
we assembled 3-mercaptopropionic acid(MPA)on gold nanoparticles to form three-dimensional(3D)monolayer. The 3Dmonolayer of MPA showed effective electrocatalytic activity towards some small biomolecules such asNADH，ascorbic acid，uric acid and dopamine，which was different from two-dimensional(2D)MPAmonolayer assembled on planar gold electrode. This result implies that 3D monolayers may have promisingapplications in electrocatalysis and electroanalysis. To provide further illustration，we investigated theelectrochemical behavior of Cu(ID on 3D monolayer of MPA. The results demonstrated that 3D MPAmonolayer inhibited the charging current while promoted the response of accumulated Cu(In on electrodesurface，which presented a voltammetric response linearly proportional to the Cu(ID concentration from 0.1μg/L to 100 μg/L，with a detection limit of 3.2 μg/L. Based on such a 3D monolayer modified electrode,trace Cu(II)in tap water was successfully determined. Moreover，we also prepared a 3D monolayer ofL-cysteine on gold nanoparticles for observing the voltammetric behavior of Cu(II).
电化学分析 纳米金 三维自组装膜 重金属检测
张敬东 杨昌柱 濮文虹 崔艳萍 曾巍
华中科技大学环境科学与工程学院,湖北,武汉,430074
国内会议
扬州
中文
317
2007-11-02（万方平台首次上网日期，不代表论文的发表时间）