Preparation of α-Fe₂O₃/g-C₃N₄ with C-O-Fe Bonds as a Electrochemical Sensor for Glucose Detection

Abstract:

The rapid glucose detection is great significance in the food, biological and medical fields. In this paper, we show an unusual strategy for the synthesis of α-Fe₂O₃/g-C₃N₄ composite material with C-O-Fe bonds for applications in glucose detection. The structural composition and the existence of C-O-Fe bonds of α-Fe₂O₃/g-C₃N₄ were evaluated by XRD, FTIR, SEM, TEM and XPS. Due to the formation of C-O-Fe bonds, the BET surface area and electron transport ability of α-Fe₂O₃/g-C₃N₄ are improved. The electrochemical experiments revealed that the α-Fe₂O₃/g-C₃N₄ sensor exhibited a fast response time (< 5 s), a low detection limit (2.3 μM) and a wide linear range (0.1 mM - 5 mM). Furthermore, the powerful C-O-Fe binding energy provides a guarantee for the reasonable stability of the α-Fe₂O₃/g-C₃N₄ sensor. The presence of high concentrations of KCl, citric acid, ascorbic acid, dopamine and sucrose appeared to have no effects on the detection of glucose, indicating a high selectivity of this sensor.

• Periodical: Journal of Nano Research (Volume 67)
• Pages: 43-54
• DOI: https://doi.org/10.4028/www.scientific.net/JNanoR.67.43
• Online since: April 2021
• Authors: Kuan Yang, Qing Bo Yu*, Hui Qin Li, Xin Xin Ren, Jia Pan, Qing Ping Wang, Xian Hua Li
• Keywords: C-O-Fe Bonds, g-C₃N₄, Glucose Detection, Sensor, α-Fe₂O₃

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