Engineering Sulfur-Doped Graphene through Chemical Vapor Deposition for Enhanced Electrochemical Sensing of Dopamine and Ascorbic Acid

Here the present work briefly discussed the synthesis of sulfur-doped graphene (SDG) for accurate determination of individual and simultaneous quantification of ascorbic acid (AA) and dopamine (DA). SDG catalyst material was prepared by using a hydrothermal technique using a carbon and sulfur source. The structural properties of SDG and its associated materials are examined using Raman spectroscopy; FT-IR analysis and morphological studies were examined using high-end FE-SEM and HR-TEM, atomic force microscopy and water contact angle dimensions. Further, SDG material-modified glassy carbon electrode (SDG/GCE) is employed to estimate the accurate quantification of DA and AA experienced through cyclic voltammetry, as well as chronoamperometry to examine the charge transfer properties at SDG. The modified electrode SDG/GCE showed finite selectivity, sensitivity and low limit of detection, with a regression coefficient value of 0.99 for DA and AA correspondingly. On the other hand, the proposed has finite stability with a retention capacity of almost 95 % after 12 days.