Innovative electrochemical quantification of brilliant blue dye with polyvinylpyrrolidone-stabilized MoS₂

Abstract

In this study, the synthesis of a composite material such as molybdenum disulphide/poly vinylpyrrolidone (MoS₂/PVP) using a simple hydrothermal method is showcased. Also discovered its capability for electrochemical detection of a well-known food dye, brilliant blue (BB), which has not been previously reported. The incorporation of PVP into MoS₂ significantly enhanced the electrochemical stability of the composite for the detection of brilliant blue. The comprehensive analysis of the material in its original state provided a thorough understanding of its structural and morphological properties, both prior to and following the incorporation of PVP. The modifications resulting from the action of PVP intercalation were intriguing and sufficiently capable of causing a considerable impact on the electrochemical output of the entire investigation. The significant transformation in morphology, from nanoflowers to a sheet-like structure, in the presence of PVP is remarkable. The MoS₂/PVP coated glassy carbon electrode (MoS₂/PVP/GCE) demonstrated the broadest linear range for BB determination compared to any previously reported results, spanning from 0.8 μM to 1150.0 μM, with a limit of detection (LOD) value of 9.0 nM. The manufactured electrode has significant repeatability and reproducibility. The selectivity analysis highlights the sensor's ability to accurately and specifically detect the target analyte, even in the presence of potential interfering substances. The evaluation of MoS₂/PVP/GCE in several authentic samples demonstrates the sensor's dependability in detecting BB in real-time situations.