Solvothermal synthesis of silver tungstate integrated with carbon nitrides matrix composites for highly sensitive electrochemical nitrofuran derivative sensing in biological samples

In the present research, we aimed to develop a novel electrochemical method based on transition metal tungstate nanorods incorporated sulfur doped carbon nitrides matrix (Ag2WO4@SGCN) for determination of antibiotic drug. The morphological and structural analysis of the prepared Ag2WO4@SGCN were performed by various techniques including SEM, EDS, XRD, and EIS. Under the optimal conditions of the sensor, the Ag2WO4@SGCN modified electrode showed outstanding electrocatalytic performance toward the electro-reduction of nitrofurantoin (NFT) with a significant increase in cathodic peak currents in comparison with the bare electrode. By differential pulse voltammetric (DPV) method the fabricated nitrofurantoin sensor gave linear response in the concentration range from 0.005 to 935 μM with detection limit (3Sb/m) of 0.0013 μM. Importantly, the practically of the proposed Ag2WO4@SGCN modified electrode was demonstrated in different biological samples. In addition, Ag2WO4@SGCN electrode displayed excellent anti-interfering ability and repeatability, reproducibility, storage and operational stability has been successfully demonstrated for detection of NFT. [Display omitted] •We fabricated a novel Ag2WO4 nanorod with encapsulated Sulfur doped graphitic carbon nitride based electrocatalyst by using solvothermal approach.•As prepared, nanorod like Ag2WO4@SGCN was successfully applied for the electrochemical detection of NFT for the first time.•The nanorod like Ag2WO4@SGCN modified electrode exhibits wide linear range and low limit of detection of about 0.005–935 μM and 1.3 nM towards NFT detection, respectively.•The real sample analysis reveals the practical applicability of Ag2WO4@SGCN modified electrode for sensing of NFT.