An efficient electrochemical sensor based on transition metal sulfides for the detection of flufenamic acid
Rex Shanlee Santhiyagu Sahayaraj, Ruspika Sundaresan, Shen‐Ming Chen, Ramachandran Balaji, Narendhar Chandrasekar
Abstract
Transition metal sulfides (TMS) have been receiving specific attention due to their excellent physiochemical properties and electrochemical activity. In this article, we demonstrate the synthesis of sea-urchin-like Bi2S3 combined with MoS2 hierarchical nanoflowers via a hydrothermal route for electrochemical sensing of Flufenamic acid (FMA). FMA is one of the non-steroidal anti-inflammatory drugs (NSAIDs) which endangers human health. The Bi2S3/MoS2 composite's formation was confirmed by various characterizations via microscopic and spectroscopic techniques. The synergistic effect between the two metal sulfides improves electron transport and enables more active sites. Under optimal conditions, the resultant nanocomposite exhibits a high sensitivity value (0.44 μA μM−1 cm−2), a reasonable limit of detection (0.009 μM), and a broad linear range (0.01 – 453 μM). Furthermore, the electrochemical detection of FMA in biological samples was achieved with good reliability and decent recovery.