An electrochemical signal amplification using functionalized carbon nanofiber integrated manganese molybdate nanocomposite for rapid detection of vanillin in food samples
Abirami Govindharaj, Parthasarathi Manimaran, Shen–Ming Chen, Elayappan Tamilalagan, Manickam Selvaraj, Gurjaspreet Singh
Abstract
Vanillin , a widely used flavoring agent in food, pharmaceuticals, and cosmetics, can cause health issues such as liver dysfunction and nausea when consumed excessively. Therefore, it is essential to monitor and control the vanillin level. This study presents the development of sensitive and cost-effective electrochemical sensor for vanillin detection, utilizing manganese molybdate (MnMoO 4 ) nanoparticles integrated with functionalized carbon nanofibers (f-CNF) nanocomposite. The chemical composition and morphology of MnMoO 4 @f-CNF were analyzed using X-ray diffraction, Raman spectroscopy , X-ray photoelectron spectroscopy, and transition electron microscopy . The fabricated MnMoO 4 @f-CNF sensor achieved the low limit of detection of 0.027 μM and wide linear range of 1.25–487.5 and 587.5–1500 μM in amperometry method towards vanillin detection. The practical feasibility of the prepared sensor towards vanillin was tested in food samples and confirmed the sensor's reliability. This study demonstrates the MnMoO 4 @f-CNF sensor's potential for rapid, accurate, and selective detection of vanillin in food safety and quality control .