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Electrochemiluminescence modified electrodes based on RuSi@Ru(bpy)3(2+) loaded with gold functioned nanoporous
Xiaohui Lv1, Yueyun Li2, Tao Yan1
1Key Laboratory of Chemical Sensing and Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, PR China.
Abstract:
Nanoporous cobalt (NPCo) with three-dimensional network nanostructure was obtained by selectively dealloying Al from CoAl alloy in a mild alkaline solution. Co3O4 grew further on the surface of NPCo and then NPCo/Co3O4 was obtained. Gold nanoparticles functionalized NPCo/Co3O4 (NPCo/Co3O4-Au) was used to fabricate electrochemiluminescence (ECL) modified electrodes for detecting mycotoxin deoxynivalenol (DON). In addition the introduction of AuNPs enhanced the conductivity, and NPCo/Co3O4-Au exhibited excellent catalytic properties for the luminescence of RuSi@Ru(bpy)3(2+). The fabricated ECL modified electrodes exhibited a high activity for DON in a wide linear range from 5 pg/mL to 100 ng/mL with a low detection limit of 1 pg/mL. The NPCo/Co3O4-Au based ECL modified electrodes displayed excellent stability and reproducibility, and successfully achieved the detection of DON in wheat flour with desirable results as well. The NPCo/Co3O4-Au possesses great application potential for ECL modified electrodes with sample detection, unique catalytic activity, and high structure stability.
