纳米金/氧化锌-多壁碳纳米管膜修饰电极的制备及其对羟胺的测定

Enhancement in Analytical Hydroxylamine Based on Gold Nanoparticles Deposited on ZnO-MWCNTs Films

通过在ZnO-MWCNTs膜修饰电极表面电沉积金纳米粒子,获得了一种用于测定羟胺的电化学传感器.ZnO-MWCNTs膜作为一种新的、有效的基底可以很好地被用来固定金纳米粒子.利用ZnO-MWCNTs膜和金纳米粒子的协同,羟胺在nano-Au/ZnO-MWCNTs膜修饰电极上有更好的电催化效果以及稳定性.在最佳条件下,用计时电流法对羟胺进行了测定,在0.25-3.0×103μM范围内呈现良好的线性关系,最低检测限可达0.08μM(S/N=3),反应时间小于3s.由于其制备简单,稳定性高等优势,该修饰电极在羟胺的定量测定方面有着良好的应用前景.

A good route（electrodeposition） for the fabrication of gold nanoparticles（nano-Au） attached on ZnO-MWCNTs films modified glassy carbon electrodes （GCE） was proposed.ZnO-MWCNTs films are favor for functioning as the biomimic membrane to immobilize nano-Au.The catalytic oxidation of hydroxylamine has a better result on the nano-Au/ZnO-MWCNTs/GCE because of the synergistic effect of nano-Au and ZnO-MWCNTs films.Under optimal conditions,hydroxylamine were determined at the nano-Au/ZnO-MWCNTs/GCE by typical amperometric response（i-t）,a wide linear range from 0.25 to 3.0×103μM was obtained.An optimized limit of detection of 0.08μM was obtained at a signal-to-noise ratio of 3 and with a fast response time（within 3 s）.The ease of fabrication and high stability of the modified electrode are the promising features for the quantitative determination of hydroxylamine with a good prospect.