A MnOOH-Polyaniline Nanocomposite Modified Gold Electrode for Electrochemical Sensing of Nitrite

作者：Shen, Yu; Zhang, Jian; Sheng, Qinglin^*; Zheng, Jianbin^*

来源：Chinese Journal of Chemistry, 2017, 35(8): 1317-1321.

DOI：10.1002/cjoc.201600892

• electrochemical sensor
• nanocomposites
• polyaniline
• MnOOH
• nitrite

A novel non-enzymatic nitrite sensor was fabricated by immobilizing MnOOH-PANI nanocomposites on a gold electrode (Au electrode). The morphology and composition of the nanocomposites were investigated by transmission electron microscopy (TEM) and Fourier transform infrared spectrum (FTIR). The electrochemical results showed that the sensor possessed excellent electrocatalytic ability for NO2- oxidation. The sensor displayed a linear range from 3.0 mol center dot L-1 to 76.0 mmol center dot L-1 with a detection limit of 0.9 mol center dot L-1 (S/N = 3), a sensitivity of 132.2 A center dot L center dot mol(-1)center dot cm(-2) and a response time of 3 s. Furthermore, the sensor showed good reproducibility and long-term stability. It is expected that the MnOOH-PANI nanocomposites could be applied for more active sensors and used in practice for nitrite sensing.

• 出版日期2017-8
• 单位西北大学