聚四氨基铜钛菁修饰Pt微电极测定溶解氧的研究(英文)

Study on Polycopper-tetraaminophthalocyanine Modified Pt Microelectrode and Its Application in Dissolved Oxygen Determination

该文通过电化学聚合的方法制得了一种化学修饰铂盘 (直径为 2 0 0微米 )电极。采用循环伏安 ,差示脉冲伏安和差示脉冲安培研究了此修饰电极对氧的响应。实验表明 ,四氨基铜酞菁对氧有较好的催化作用。用此修饰电极采用差示脉冲安培法测定溶解氧灵敏度为 4 .8× 10 - 4A/mol/L ,检测限根据三倍信噪比计算得 1.8× 10 - 6 mol/L ,且响应时间少于 15秒。研究还发现 ,此修饰电极具有很好的稳定性和重现性。采用此修饰电极测定锅炉水中的溶解氧得到了满意的结果。

A electrochemically modified microelectrode was prepared by electropolymerization of copper tetraaminophthalocyanine (CuTAPc) on a Pt (diameter 200μm ) disc microelectrode. It was found that copper tetraaminophthalocyanine exhibited a good electrocatalytic effect on O 2 reduction. The response of copper tetraaminophthalocyanine modified Pt microelectrode to O 2 was studied with cyclic voltammetry (CV), differential pulse voltammetry (DPV) and differential pulse amperometry (DPA). It was found that the sensitivity was 4.8×10 -4 A/mol/L, the detection limit was calculated to be 1.8×10 -6 mol/L at a signal to noise ratio of 3 and the response time was less than 15 seconds when the copper tetraaminophthalocyanine modified microelectrode was used to determine the dissolved oxygen by differential pulse amperometry (DPA) technique. It was also found that the copper tetraaminophthalocyanine modified microelectrode showed good stability and reproducibility. The dissolved oxygen in a sample of boiler water was determined by this modified electrode and satisfied results were obtained.