Electrochemiluminescence detection of diazinon in vegetables based on the synergistic interaction of WO3-x dots with Au@SiO2 nanocapsules

• Published in: Food chemistry 2024-07, Vol.447, p.139011-139011, Article 139011
• Main Authors: Liu, Wenzheng, Wang, Haifang, Li, Peisen, Li, Chengqiang, Li, Donghan, He, Zhenying, Zhang, Yuhao, Huang, Jingcheng, Hua, Jin, Xu, Rui, Xia, Lianming, Guo, Yemin, Sun, Xia
• Format: Article
• Language: English
• Subjects: Aptasensor; Diazinon; Electrochemiluminescence; Ruthenium(II) tris(2,2′-bipyridine); Vegetables; WO3-x dots
• ISSN: 0308-8146; 1873-7072
• DOI: 10.1016/j.foodchem.2024.139011

In this work, a simple synthesis of low-toxicity transition metal material of WO3-x dots was used as a co-reactant with Au@SiO2 as a core-shell material and a signal amplification factor to collaboratively promote Ru(bpy)32+ electrochemiluminescence (ECL) for the construction of a highly sensitive aptasensor for the detection of diazinon (DZN) in vegetables. Electrodes modified with multi-walled carbon nanotubes-chitosan composite membranes (MWCNTs-CS) were used to load and immobilize more Ru(bpy)32+.can load more Ru(bpy)32+. WO3-x dots synthesized by a simple method showed excellent ECL efficiency as a novel co-reactant for Ru(bpy)32+. Under optimized conditions, this aptasensor for DZN has a wide detection range (10 pg mL−1 - 1 μg mL−1.) and a low detection limit (0.0197 ng L−1). The aptasensor has shown good results in the analysis of real samples in the experiment. This work provides a new approach to the construction of a novel electrochemiluminescence sensor for the detection of pesticides. •A simple method for synthesizing WO3-x dots.•WO3-x dots was used as a novel Ru(bpy)32+ co-reactants for detecting DZN.•Using WO3-x dots and Au@SiO2 collaborative promotion of ECL detection for DZN.•This work provides a new idea for the new ECL detection system of pesticides.