电化学发光
检出限
钌
石墨烯
发光
化学发光
马拉硫磷
电子转移
材料科学
氧化物
Nafion公司
电极
无机化学
化学
核化学
光化学
纳米技术
电化学
光电子学
有机化学
色谱法
催化作用
物理化学
冶金
杀虫剂
生物
农学
作者
Juan Lu,Xiangyu Shan,Qian Wu,Yingjie Zhao,Chao Li,Huiling Li,Shuning Yang,Li Tian
标识
DOI:10.1016/j.microc.2022.108321
摘要
Metal oxides containing iron and zinc (ZnO-Fe2O3) combined with ruthenium bipyridine [Ru(bpy)32+], graphene oxide (GO) and multi-walled carbon nanotube (MWNTs) were applied in the field of electrochemiluminescence (ECL). And a new solid-state ECL sensor for malathion determination by modifying ZnO-Fe2O3, Ru(bpy)32+, [email protected], Acetylcholinesterase (AchE) and Nafion on the electrode surface. The synthesized ZnO-Fe2O3 and [email protected] with large specific surface area were used as carrier to anchor Ru(bpy)32+ and AchE, respectively. ZnO-Fe2O3 and [email protected] can also be used as accelerators to promote electron transfer of the system. ZnO-Fe2O3 was also involved in the luminescence reaction, which increased the sensitivity of the system together with Ru(bpy)32+. Taking advantages of the electrocatalysis and electron transport capacity of ZnO-Fe2O3 and [email protected], the sensor obtained stable and amazing ECL response. The ECL response value decreased after malathion was introduced. In the range of 6.6 × 10−11 to 6.6 × 10−7 M, the decrease value (ΔI) was linearly related to the logarithm of malathion concentration, and the detection limit was 2.2 × 10−11 M. The method was simple and stable, and can be used to determine malathion in vegetable samples.
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