2D/2D porous Co3O4/rGO nanosheets act as an electrochemical sensor for voltammetric tryptophan detection

Herein, 2D/2D porous Co3O4 nanosheets/rGO composites modified GCE (Co3O4/rGO/GCE) were proposed for electrochemical detection of tryptophan (Trp). The surface morphology and structure of Co3O4/rGO nanosheets were carried out using SEM, XRD, and Raman spectra. Electrochemical performance of Trp on as-synthesized modified electrodes were discussed by CV and EIS techniques. Moreover, the best electrochemical property was also investigated by varying test condition detailedly. Consequently, oxidation peak intensity and current density were 130.3 μA and 336.7 μA·cm−2 on Co3O4/rGO/GCE at working potential of 0.78 V (vs. SCE electrode), respectively. They were more than 23-times greater than these on bare GCE in…

• NN
  National Natural Science Foundation of China

  Award: 22106042
• NS
  Natural Science Foundation of Hunan Province

  Award: 2020JJ5126
• SR
  Scientific Research Foundation of Hunan Provincial Education Department

  Award: 20C0644