Nd_2O_3/多壁碳纳米管修饰电极检测亚硝酸根  

Detection of nitrite based on Nd_2O_3/multi-walled carbon nanotubes modified electrode

作　　者：张娜[1] 张克营[2] 王聪[2] 李雪莲[2] 杨律超 

机构地区：[1]安徽省宿州学院体育学院,安徽宿州234000 [2]安徽省宿州学院自旋电子与纳米材料安徽省重点实验室生物与化学工程学院,安徽宿州234000

出　　处：《化学研究与应用》2014年第9期1467-1471,共5页Chemical Research and Application

基　　金：安徽省教育厅自然科学基金项目(KJ2012Z399);安徽省教育厅自然科学基金重点项目(KJ2013A247);安徽省自然科学基金青年基金项目(1208085QB33);宿州学院科研平台开放课题(2012YKF04;2012YKF05);宿州学院大学生科研立项(KYLXLKYB13-10)

摘　　要：制备了纳米Nd2O3/多壁碳纳米管修饰电极并用于亚硝酸盐的检测。采用原子力显微镜、X-粉末衍射仪表征制备的纳米材料。实验表明:修饰电极对亚硝酸根的氧化具有明显地电催化作用。利用示差脉冲伏安法测定亚硝酸盐,其氧化峰电流和其浓度在20μmol·L-1-20 mmol·L-1范围内呈现良好的线性关系,检测线为0.83μmol·L-1(S/N=3)。更重要的是,实验结果表明:与Nd2O3修饰电极相比,多壁碳纳米管能显著地提高电极的稳定性。此外,修饰电极具有良好的选择性,能用于样品的检测,结果令人满意。A Nd2 O3 nanoparticles/multi-walled carbon nanotubes modified electrode was fabricated and used to detect nitrite. Nanomaterials were characterized by atomic force microscopy, X-ray powder diffraction. Results showed the modified electrode exhibited an obvious electrocatalytic activity for the oxidation of nitrite. Differential pulse voltammetry was used to detect the nitrite with a linear range from 20 μM to 20 mM and a detection limit of 0. 83 μM（S/N=3）. The stability of sensor was investigated, compared with Nd2 O3 nanoparticles modified electrode, the proposed the electrode showed a more better stability. In addition, the sensor also exhibited excellent selectivity,and was applied to determine nitrite in sample with satisfactory result.

关 键 词：亚硝酸根 Nd2 O3 多壁碳纳米管 修饰电极 ND2O3 

分 类 号：O646.5[理学—物理化学]