Ultrathin nickel-metal-organic framework nanobelt based electrochemical sensor for the determination of urea in human body fluids

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Abstract

Ultrathin nickel-metal-organic framework (Ni-MOF) nanobelts, [Ni20(C5H6O4)20(H2O)8]·40H2O (Ni-MIL-77), have been exploited successfully for the fabrication of a non-enzymatic urea sensor. Ni-MOF ultrathin nanobelts in alkaline media can be used as an efficient catalyst for urea electrooxidation. As a non-enzymatic urea sensor, Ni-MOF ultrathin nanobelts exhibit a high sensitivity of 118.77 μA mM-1 cm-2, wide linear range of 0.01-7.0 mM, and low detection limit of 2.23 μM (S/N = 3). The selectivity, stability and reliability of ultrathin Ni-MOF nanobelts towards urea oxidation are also investigated. Moreover, Ni-MOF ultrathin nanobelts were further used to detect urea in human body fluids. All these findings confirm that the urea sensor based on Ni-MOF ultrathin nanobelts is successfully prepared and promising for applications in medical diagnostics and environmental monitoring.

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Bao, C., Niu, Q., Chen, Z. A., Cao, X., Wang, H., & Lu, W. (2019). Ultrathin nickel-metal-organic framework nanobelt based electrochemical sensor for the determination of urea in human body fluids. RSC Advances, 9(50), 29474–29481. https://doi.org/10.1039/c9ra05716a

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