Defect Mediated W₁₈O₄₉ Nanorods Bundle for Nonenzymatic Amperometric Glucose Sensing Application

Abstract

In this work, we have successfully proclaimed the importance of defect prone nanostructure on to the electrode surface for the promising glucose sensing applications. Oxygen-deficient W18O49 moieties with multiple valences W6+ and W5+ have been investigated as an efficient electrocatalyst for the nonenzymatic glucose sensing. In order to highlight the importance of the defect, WO3 nanomaterial’s electrode has also been synthesized and tested for glucose sensing. W18O49 delivers a larger Brunauer–Emmett–Teller (BET) surface area and mesoporous pores which have contributed to the high sensitivity performances. The oxygen vacant W18O49 nanostructure has been synthesized by a facile solvothermal route and has retained interconnected nanorods morphology. Compared with non-oxygen-deficient WO3, this defect prone version of tungsten oxide (W18O49) possesses a doubled linearity range up to 1.6 mM maximum electrooxidation toward glucose by giving a 1.6 times higher sensitivity of 167 μA mM–1 cm–2, 0.5 times lower detection limit of 0.02 μM (S/N = 3), and a swift response time of 5 s.

Tungsten‐based Nanomaterials in the Biomedical Field: A Bibliometric Analysis of Research Progress and Prospects

“…Although several methods using glucose oxidase as an enzyme‐based biosensor have been proposed for glucose detection, their further utilization is hindered by problems such as enzyme immobilization, poor stability, and vulnerability to external influences. [ 34 ] Therefore, the development of a non‐enzymatic glucose sensor may be a better choice. Two technologies for the higher sensitivity performance of non‐enzymatic glucose sensors have been introduced.…”

Defect-Induced Self-Poling in a W18O49/PVDF Piezoelectric Energy Harvester

“…The presence of two valence states of tungsten in the compound indicates the presence of nonstoichiometric oxygen-deficient (WO 3– x ) species of tungsten oxide. , The deconvoluted O 1s spectra are shown in Figure (g). The peak at 530 eV corresponds to W–O–W bonds which indicate the presence of lattice oxygen, whereas the peak at 531.8 eV corresponds to the oxygen atoms that lie close to the oxygen vacancies in W 18 O 49 nanorods. , …”

“…The peak at 530 eV corresponds to W−O−W bonds which indicate the presence of lattice oxygen, whereas the peak at 531.8 eV corresponds to the oxygen atoms that lie close to the oxygen vacancies in W 18 O 49 nanorods. 17,46 During the synthesis of W 18 O 49 nanorods, there is the possibility of the formation of WCl 6−x (OC 2 H 5 ) x , when WO 3−x is dissolved in ethanol. However, we have washed it several times with ethanol and water using centrifugation, which eliminates the possibility of any residual WCl 6−x (OC 2 H 5 ) x .…”

Transformation of Battery to High Performance Pseudocapacitor by the Hybridization of W18O49 with RuO2 Nanostructures

“…The electrochemical features of the nanostructure favor its applications in the field of sensors, field emission, electrochromic devices, and photocatalysis. The monoclinic structure of tungsten oxide with multiple oxidation states has an oxygen deficiency which helps to reduce the resistivity and enhances the electrochemical features …”

“…The monoclinic structure of tungsten oxide with multiple oxidation states has an oxygen deficiency which helps to reduce the resistivity and enhances the electrochemical features. 14 RuO 2 nanostructures have some extraordinary features of high theoretical capacitance (1300−2200 F/g) and conductivity (10 5 S/cm). The most desirable properties are its high chemical stability in an acidic medium which makes it worthy for electrochemical applications and, hence, widely studied across the world.…”