Engineering Sulfur-Doped
Graphene through Chemical Vapor Deposition for Enhanced Electrochemical Sensing
of Dopamine and Ascorbic Acid
Dronavalli Bhargavi, Ande Rajesh, Vallabhaneni Madhava Rao, G.V. Adilakshmi and
Kolli Deepti
Res. J. Chem. Environ.; Vol. 29(9); 1-9;
doi: https://doi.org/10.25303/299rjce0109; (2025)
Abstract
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.
