Sensitive photoelectrochemical sensing of glucose using hematite decorated with NiAl-layered double hydroxides. (30th March 2023)

• Record Type: Journal Article
• Authors: Fan, Ming; Zhu, Shuai; Zhang, Qinqin; Wang, Xinshou; Zhang, Ling; Chang, Zhixian; Chong, Ruifeng
• Is Part Of: Food chemistry. Volume 405:Part B(2023)
• Publication Date: 2023-03-30
• Subjects: Photoelectrochemical sensor -- Hematite -- NiAl-LDH -- Glucose -- Food sample; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2022.134883
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: NiAl-LDH/α-Fe2 O3 photoelectrochemical sensor has been successfully fabricated. NiAl-LDH/α-Fe2 O3 exhibits excellent photoelectrochemical sensing toward glucose. NiAl-LDH acts as and/or provide active sites for glucose detection. NiAl-LDH enlarges the band bending and decreases the charge transfer resistance. Abstract: Hematite (α-Fe2 O3 ) is a promising photoelectrode material for photoelectrochemical (PEC) sensors. However, it still suffers from serious surface charge recombination and slow interfacial charge transfer kinetics. In this work, NiAl-layered double hydroxides decorated on α-Fe2 O3 (NiAl-LDH/α-Fe2 O3 ) was successfully fabricated via a facile hydrothermal method. The NiAl-LDH/α-Fe2 O3 exhibits excellent PEC response toward glucose, with a good linear range from 0.01 to 2 mM, a high sensitivity of 274.7 μA·mM −1 ·cm −2 and a low detection limit of 0.005 mM. NiAl-LDH/α-Fe2 O3 PEC sensor could be used for glucose determination in various food samples, such as bread, toast and glucose oral solution, which achieved comparable results with that of HPLC. PEC and electrochemical characterizations indicate NiAl-LDH could act as and/or provide active sites for glucose detection, enlarge the band bending and decrease the charge transfer resistance, thus significantly improve the PEC response of α-Fe2 O3 toward glucose.