Mn incorporation boosted NiO nanosheets as highly efficient anode for sensitive glucose detection in beverage

Abstract

NiO was one of the most utilized anode materials in glucose sensing, however, it suffers from inherent poor electronic conductivity and associated limited catalytic performance. In this paper, Mn-doped NiO nanosheets supported on carbon cloth (Mn–NiO NSs/CC) was prepared via annealing NiMn-layered double hydroxide (NiMn LDH) under air condition. As 3D integrated electrode, Mn–NiO NSs/CC shows superior catalytic activity towards glucose oxidation, and holds great potential in glucose sensitive sensing. Mn–NiO NSs/CC displays high performance, with a wide linear range from 2.0 μM to 2.14 mM, a high sensitivity of 3.53 mA mM−1 cm−2, and a low detection limit of 0.6 μM (S/N = 3). Additional, Mn–NiO NSs/CC shows excellent selectivity and reliability for glucose detection in sports beverages. This work provides a simple method for boosting NiO catalytic activity in glucose sensing, and builds a sensitive glucose sensor for food analysis.