Molybdenum-cobalt micro-nano interface assisted ultrasensitive and selective non-enzymatic glucose biosensor
Microchemical Journal(2023)
Abstract
In the present work, we report highly sensitive and selective non-enzymatic glucose biosensor using novel hybrid CoOOH nanospheres decorated MoO3 nanobelts (MoCo). MoCo nanocomposite exhibits superior sensing prop-erties toward glucose detection due to its improved electron transfer capability along with the large surface area. The biosensor achieved an excellent linear range within the concentration of 0.001-1.0 mM correspond to the amperometric current response was obtained from GCE/MoCo/Nafion electrode. The biosensing electrode is resulted a linear regression coefficient (R2 = 0.9959) and limit of detection (LOD) is 56 & mu;M at (S/N = 3). The performance optimization of the biosensor was performed at a different operating temperature subjected to successive glucose additions. A remarkable selectivity is obtained against to the glucose at presence of different interfering substance and long-term stability of 30 days reached without a noticeable decay in the amperometric current response.
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Key words
Molybdenum-cobalt,Nonenzymatic biosensor,Electrochemical,Glucose detection,CoOOH nanoparticles
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