Carbon fibre-supported hierarchical NiCo layered double hydroxide nanosheets as non-enzymatic glucose sensors for sport drinks and serum. (30th July 2022)

• Record Type: Journal Article
• Authors: Lo, Chieh-Tsung; Wu, Yi-Shan; Huang, Sheng-Min; Tsai, Pei-Jung; Lee, Chien-Liang
• Is Part Of: Food chemistry. Volume 383(2022)
• Publication Date: 2022-07-30
• Subjects: Glucose electrooxidation reaction -- Surface effect -- Temperature effect -- Non-enzymatic glucose sensor -- Linear analysis range; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2022.132383
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: Syntheses of CF-NiCo LDHN and with heat treatment at 200 and 400° are demonstrated. Sequential and transient catalysis of GOR by these NiCo nanomaterials are studied. CF-NiCo LDHN ([(Ni 2+ 0.5 Co 3+ 0.5 )(OH − )2 ][Br - 0.5 ·0.5H2 O]) has remarkable j0 for GOR. Glucose dehydrogenation and one-electron release occurred first on the NiCo LDHN. CF-NiCo LDHN shows high recovery and low RSD (<5%) for sensing glucose. Abstract: We report a systematic study of carbon fibre (CF)-supported NiCo layered double hydroxide nanosheets (LDHNs) with and without heat treatment at 200 and 400 °C (CF-NiCo LDHN200 and CF-NiCo oxide nanoparticles (NPs), respectively) as catalysts and sensors for glucose oxidation reactions (GORs). Tafel measurements for the GORs showed that the exchange current density of CF-NiCo LDHN was 1.91 × 10 −3 mA·cm −2 at an early rest potential of −0.422 V. This was markedly higher than those of CF-NiCo LDHN200 (1.22 × 10 −3 mA·cm −2 at − 0.352 V) and CF-NiCo oxide NP (1.18 × 10 −3 mA·cm −2 at −0.327 V). The electron transfer number and Tafel slopes suggested that the glucose dehydrogenation step and one-electron release occurred first in the GORs. Amperometric measurements revealed high recoveries (101.92% and 98.92%) and low relative standard deviations (1.98% and 2.34%) for the determination of glucose using the CF-NiCo LDHN in sports drink samples and human serum.