Bi2S3/rGO Composite Based Electrochemical Sensor for Ascorbic Acid Detection

The engineering of an efficient electrochemical sensor based on a bismuth sulfide/reduced graphene oxide (Bi2S3/rGO) composite to detect ascorbic acid (AA) is reported. Bi2S3 nanorods/rGO was synthesized using facile hydrothermal method. By varying the amount (GO) added synthesis, morphology and size nanorods anchored surface rGO can be tuned. Compared bare glassy carbon electrode (GCE), GCE modified with Bi2S3/rGO presented enhanced performance, which attributed optimal electron transport between support loaded as well increase in number active catalytic sites. Cyclic voltammetry (CV) impedance spectroscopy (EIS) analysis Bi2S3/rGO/GCE demonstrate that layer plays important role behavior sensor. In particular, shows wide detecting range (5.0–1200 μM), low detection limit (2.9 µM), good sensitivity (268.8 μA mM−1 cm−2), sufficient recovery values (97.1–101.6%) for acid.