Electrochemical activity of 3D hairy hollow sphered Mn‐Cu‐Al layered hydroxide nanocomposites: A short survey on glucose analyte

摘要

Abstract A sensitive hollow shell‐based non‐enzymatic glucose sensor was developed using Mn‐Cu‐Al layered triple hydroxide on the surface of nickel foam (Mn‐Cu‐Al‐TH/NF). Mn‐Cu‐Al‐TH nanocomposites were prepared using a facile microwave‐assisted technique, and its hollow structure was created by continuous treatment with urea. The electrochemical activity of the Mn‐Cu‐Al‐TH/NF electrode was examined by cyclic voltammetric techniques. It was identified that the Mn‐Cu‐Al‐TH/NF electrode exhibited enhanced electrocatalytic activity towards glucose oxidation in alkaline medium (pH = 13), as compared with Mn‐Cu‐DH/NF and Mn‐H/NF electrodes. The electrocatalytic activity of the modified electrode under various pH values has been investigated. Under the optimized conditions, the electrochemical sensor exhibits a linear sensitivity towards glucose from 5 μM to 4 mM with a sensitivity of 2,108 μA mM?1 cm?2. Moreover, the glucose sensor demonstrated good selectivity, stability, fast response (<2 s), and repeatability. Our results suggest that Mn‐Cu‐Al‐TH hollow‐shelled layered triple hydroxide (LTH) nanocomposite could be a promising candidate for the construction of a nonenzymatic sensor.