基于复杂多壁碳纳米管衍生物为载体的痕量铝离子电极的研究及其在环境中的应用  

Studies on derivatized multi-walled carbon nanotubes application on Al^(3+) carbon paste electrode

作　　者：贾峰[1] 柴雅琴[2] 

机构地区：[1]运城市疾病预防控制中心,山西运城044100 [2]西南大学化学化工学院,重庆400715

出　　处：《化学传感器》2014年第4期27-33,共7页Chemical Sensors

摘　　要：该文报道了一种新的基于复杂多壁碳纳米管衍生物为载体的铝离子碳糊电极。引入的碳糊电极,在很大程度上改善了铝离子电极的线性范围、检出限、p H值范围及响应时间等。此外,该电极具有较高选择性和较长的使用时间(超过3个月)。该文课题组选择分离溶液法(SSM)测定铝离子碳糊电极的选择性系数,该电极对铝离子具有很好的选择性。重要的是,该文课题组采用交流阻抗法和紫外-可见光谱技术研究了电极的响应机理。最后,该电极被成功地应用于环境样品中铝离子浓度的测定。A new derivatized multi-walled carbon nanotubes - based A13~ carbon paste electrode is reported. The introduce of carbon nanotubes in the electrode, have largely improved the performance of the A13~ electrode, such as Nernstian linear range, detection limit, pH range, response time. Moreover, it also shows a high selectivity and a long life time （more than 3 months）. The selectivity coefficients of A13＋ carbon paste electrode were determined by the separate solution method （SSM）. The electrode is selective towards A13＋ ion over a lot of other cations, as the selectivity coefficient value is slightly higher. Importantly, the response mechanism of the proposed electrode was investigated by using AC impedance and UV-visible spectroscopic techniques. Finally, the electrode was successfully applied for the determination of A13＋ ion concentration in environmental samples.

关 键 词：离子选择性电极 碳糊电极 多壁碳纳米管 纳米金 

分 类 号：O657.1[理学—分析化学]