Sulfur-doped Graphene-coated Graphite Foil as Disposable Electrodes for Electrochemical Sensing

In this study, sulfur-doped graphene-coated graphite foil (SGGF) was obtained using an in-situ cathodic exfoliation method. Graphene modified on the surface of graphite improves its specific surface area. Cathodic exfoliation prevents the formation of oxygen-containing groups, resulting in high conductivity. The S-doping also improved the charge-carrier concentration and conductivity of the SGGF. The high surface area and conductivity make SGGF a promising electrode for simultaneously detecting ascorbic acid, dopamine, and uric acid. The current responses of the SGGF electrodes were linear with their concentration. The linear concentration ranges were 1 - 4 mM, 1 - 25 mu M, and 1 - 25 mu M with detection limits of 47, 0.12, and 0.15 mu M, respectively.

Automated summary

In this study, sulfur-doped graphene-coated graphite foil (SGGF) was obtained using an in-situ cathodic exfoliation method. Graphene modified on the surface of graphite improves its specific surface area, resulting in high conductivity. The S-doping also improved the charge-carrier concentration and conductivity of the SGGF. SGGF shows promise as an electrode for simultaneous detection of ascorbic acid, dopamine, and uric acid, with linear concentration ranges and low detection limits.