单壁碳纳米管-氧化石墨烯复合修饰电极测定邻苯二酚

摘要

制备了用于测定邻苯二酚的单壁碳纳米管‐氧化石墨烯复合修饰玻碳电极．用循环伏安法研究了邻苯二酚在该电极上的电化学行为．结果表明，该修饰电极对邻苯二酚具有良好的电催化性能．在最佳实验条件下，采用差分脉冲伏安法对邻苯二酚进行了测定，其氧化峰电流与邻苯二酚浓度在2×10－6～1×10－4 mol／L 范围内呈线性关系，相关系数为0．9962，检出限为4×10－7 mol／L ．该电极具有良好的重现性，用于模拟废水中邻苯二酚的测定结果令人满意．%A single walled carbon nanotube‐graphene oxide/GCE (glassy carbon electrode) elec‐trode was prepared to determine catechol .The electrochemical behavior of catechol on the mod‐ified electrode was investigated using cyclic voltammetry .The experimental results show that the modified electrode has good catalytical ability to catechol .Under the optimum experimental conditions ,the catechol was determined by differential pulse voltammetry .The oxidation peak current and the concentration of catechol show good linear relationship in the range of 2 × 10 - 6- 1 × 10 - 4 mol/L .The correlation coefficient is 0 .996 2 and the detection limit is 4 × 10 - 7 mol/L .The electrode showed good repeatability and was used to determine catechol in artificial wastewater with satisfactory results .