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

• Published in: Materials chemistry and physics 2025-02, Vol.332, p.130155, Article 130155
• Main Authors: Murali, Aswathy S., Saraswathyamma, Beena
• Format: Article
• Language: English
• Subjects: Brilliant blue; Linear range; MoS2/PVP; Nanoflower; Sheet-like structure
• ISSN: 0254-0584
• DOI: 10.1016/j.matchemphys.2024.130155

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. [Display omitted] •The morphological alteration of MoS2 from the intercalation of PVP is demonstrated using characterization approaches.•The MoS2/PVP is applied to the glassy carbon electrode (GCE) and is utilized for the analysis of brilliant blue.•The MoS2/PVP composite demonstrated superior electrochemical properties compared to the pure MoS2.•The linear range for detecting brilliant blue is larger than that of any previously reported electrochemical sensors.•The novel sensor is employed in diverse real time scenarios to observe the practical reliability of the sensor.