亚硝酸盐
材料科学
纳米复合材料
电化学气体传感器
安培法
石墨烯
热液循环
纳米棒
检出限
电化学
化学工程
电极
氧化物
纳米技术
化学
冶金
硝酸盐
色谱法
有机化学
物理化学
工程类
作者
Zhenyu Cheng,Haiyan Song,Xian‐Fa Zhang,Xiaoli Cheng,Yingming Xu,Hui Zhao,Shan Gao,Li‐Hua Huo
标识
DOI:10.1016/j.snb.2021.131313
摘要
A novel stir bar-shaped ZnO (sb-ZnO)/nitrite-doped reduce grapheme oxide (N-rGO) nanocomposite (sb-ZnO/N-rGO) was facilely synthesized by using the hydrothermal route. Furthermore, a glassy carbon electrode (GCE) modified with the sb-ZnO/N-rGO nanocomposite was constructed and used as the non-enzymatic nitrite electrochemical sensor (sb-ZnO/N-rGO/GCE). Benefiting from the excellent catalytic activity to the electro-oxidation of nitrite as a result of the synergy of N-rGO and sb-ZnO, the modified electrode displayed a superior amperometric sensing performance toward nitrite detection including lower detection limit (LOD) of 0.13 μM, broad linearity range of 0.2 μM~1.2 mM and 1.5–7.8 mM, high sensitivity, rapid response, remarkable repeatability, outstanding durability, good storage stability and strong resistance against interfering substance. In addition, this sensor showed satisfying recovery between 96.0% and 103.0% to nitrite in practical application involved ham sausage, pickled vegetables as well as tap water. The as-synthesized sb-ZnO/N-rGO composite is a qualified candidate for fabricating nitrite electrochemical sensor, which would have promising application prospect in terms of food analysis and environmental monitoring.
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