Selective enhancement of non-enzymatic glucose sensor by used PVP modified on α-MoO3 nanomaterials

Abstract

Among numerous metal oxide based nanocomposites, the polymer incorporated nanocomposites has received fascinated attention as promising electrode materials for inexpensive nonenzymatic glucose sensor. In this study, development of a sensitive and selective glucose sensor was fabricated using molybdenum trioxide (MoO3) via sol–gel method. The synthesized molybdenum trioxide was modified with capping molecule (wt% = 2, 4 and 6) PVP(poly-(vinylpyrrolidone)). The morphology and microstructure of the samples were examined by UV–vis diffuse reflectance spectroscopy (UV–vis-DRS), Fourier Transmission Infra-Red spectroscopy (FT-IR), Raman spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), high-resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS) and brunauer-emmett-teller (BET) analysis. The fabricated PVP modified MoO3 nanocomposites were utilized as a non-enzymatic glucose sensor in 0.1 M NaOH medium at a pH of 12 at room temperature. The synthesized nanocomposites have magnificent performance towards the detection of glucose. This is owing to enhancement effect as well as mesoporous nature of MoO3/(6%)PVP nanocomposite. The sensor demonstrates a low detection limit of 0.022 µM with a sensitivity of 86.42 µA mM−1 cm−2. It also exhibits good selectivity, stability and simplicity for the rapid detection of glucose. This sensor was opted for the determination of glucose in real sample as well.