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Search: WFRF:(Chang Abdul Sattar)

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1.
  • Chang, Abdul Sattar, et al. (author)
  • Pd-Co3O4-based nanostructures for the development of enzyme-free glucose sensor
  • 2022
  • In: Bulletin of Materials Science. - : INDIAN ACAD SCIENCES. - 0250-4707 .- 0973-7669. ; 45:2
  • Journal article (peer-reviewed)abstract
    • In this study, we report enzyme-free glucose sensors based on palladium (Pd) nanoparticles deposited onto Co3O4 nanostructures. A simple, low-temperature aqueous method was used for the fabrication of Co3O4 nanostructures. Then, Pd nanoparticles were decorated onto Co3O4 nanostructures using the ultraviolet reduction method. Morphology, elemental composition and crystalline features of the proposed composite nanostructures were investigated by powder X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy techniques. Cyclic voltammetry and linear sweep voltammetry were used to investigate the electrochemical behaviour of Pd-Co3O4 nanostructures during glucose sensing. The proposed nanostructures showed excellent electrochemical activity for the quantitative detection of glucose at a potential of 0.6 V vs. Ag/AgCl. Importantly, the fabricated enzyme-free glucose sensor shows a linear response over the range of 1-6.0 mM glucose, with a limit of detection of 0.01 mM. The interference study was also carried out to probe the selectivity of Pd-Co3O4 nanostructures towards glucose detection in the presence of different interfering substances. The combined results attest that the as-synthesized Pd-Co3O4 nanostructures are highly stable and selective for the detection of glucose, suggesting their great potential for the quantitative determination of glucose in different biological fluids.
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2.
  • Mangrio, Sanjha, et al. (author)
  • Advanced Urea Precursors Driven NiCo2O4 Nanostructures Based Non-Enzymatic Urea Sensor for Milk and Urine Real Sample Applications
  • 2023
  • In: Biosensors. - : MDPI. - 2079-6374. ; 13:4
  • Journal article (peer-reviewed)abstract
    • The electrochemical performance of NiCo2O4 with urea precursors was evaluated in order to develop a non-enzymatic urea sensor. In this study, NiCo2O4 nanostructures were synthesized hydrothermally at different concentrations of urea and characterized using scanning electron microscopy and X-ray diffraction. Nanostructures of NiCo2O4 exhibit a nanorod-like morphology and a cubic phase crystal structure. Urea can be detected with high sensitivity through NiCo2O4 nanostructures driven by urea precursors under alkaline conditions. A low limit of detection of 0.05 and an analytical range of 0.1 mM to 10 mM urea are provided. The concentration of 006 mM was determined by cyclic voltammetry. Chronoamperometry was used to determine the linear range in the range of 0.1 mM to 8 mM. Several analytical parameters were assessed, including selectivity, stability, and repeatability. NiCo2O4 nanostructures can also be used to detect urea in various biological samples in a practical manner.
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