采用将氯金酸溶液直接分散于多壁碳纳米管中,用该复合物制备修饰电极.在该修饰电极上进行电位还原,得到金纳米粒子/碳纳米管修饰电极.研究了对壬基酚在该电极上的电化学行为.制备的金纳米粒子/碳纳米管修饰电极能显著提高对壬基酚的氧化峰电流.研究了这种修饰电极测定对壬基酚的条件.在最佳条件下,对壬基酚在3×10-7-4×10-5 mol/L浓度范围内与氧化峰电流呈现良好的线性关系(r =0.994 6),检出限为1.5×10-8mol/L.对实际样品进行测定,加标回收率为92.6％-100％.%HAuCl4 was dispersed into multi-walled carbon nanotube to get MWCNT-HAuCl4 complex. A MWC-NT-HAuCl4 modified glassy carbon electrode was charged at negative potential to get gold nanoparticle doped carbon nanotube glassy carbon electrode (GNP doped CNT/GCE). The electrochemical behavior of Nonylphenol was investigated by cyclic voltammetry( CV). The oxidation peak current was significantly enhanced by GNP doped CNT/ GCE in contrast to bare GCE. Under optimizing the experimental conditions, the oxidation peak current varies linearly with the concentration of Nonylphenol over the range from 3 × 10-7 to 4×10-5 mol/L with the linear correlation coefficient is r = 0. 994 6, and the detection limit is 1.5 ×10-8 mol/L. The spiked recovery of the samples is 92.6%-101%.
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