Carbon dot-V2O5 layered nanoporous architectures for electrochemical detection of Bisphenol A: An analytical approach

A novel carbon dot-Vanadium pentoxide (C-dot-V2O5) nanoporous material was synthesised by thermal decomposition method. C-dot was prepared from cow milk by hydrothermal treatment followed by thermal treatment with ammonium metavanadate (NH4VO3) to achieve C-dot-V2O5 nanoporous structure. The C-dot incorporation into the V2O5 lattice was confirmed by various spectroscopic and microscopic characterization. Cyclic voltammetry (CV) and electrochemical impedance studies (EIS) were carried out to study the electrochemical behaviour a of as fabricated C-dot-V2O5 nanoporous modified glassy carbon electrode (C-dot-V2O5/GCE). The electrochemical analysis confirmed that C-dot-V2O5/GCE exhibited high electrochemical surface area, uniform pore size and electron transfer rate constant. Further, the fabricated C-dot-V2O5/GCE utilized Bisphenol A (BPA) detection in the concentration range of 5 x 10(-9) M to 9.2 x 10(-3) M using ampe riometric technique. The electrochemical results clears the C-dot-V2O5/GCE electrode was able to detection the BPA at 8.0 x 10 -10 M level with the maximum sensitivity of 0.0681 mu A mu M-1. Finally the developed C-dot-V2O5/GCE for BPA sensor was evaluated in drinking water and milk samples which confirms analytical applicability of the sensor.

Automated summary

A novel carbon dot-Vanadium pentoxide (C-dot-V2O5) nanoporous material was synthesized, and its incorporation of C-dot into the V2O5 lattice was confirmed. The fabricated C-dot-V2O5/GCE electrode showed high electrochemical surface area, uniform pore size, and electron transfer rate constant, enabling the detection of Bisphenol A (BPA) with high sensitivity.