计时安培法
介电谱
循环伏安法
电化学
石墨烯
材料科学
检出限
电化学气体传感器
安培法
化学
核化学
纳米技术
色谱法
电极
物理化学
作者
Feiyun Cui,Haiming Sun,Xueqiong Yang,Hang Zhou,Yonghong Wu,Jing Li,Hongxia Li,Jianlei Liu,Chijia Zeng,Bin Qu,Jufan Zhang,Qin Zhou
标识
DOI:10.1016/j.cej.2023.141303
摘要
Glucose monitoring is of great significance for the health management of diabetic patients. Herein, non-enzymatic glucose sensors were developed by modifying [email protected] or [email protected]/V2CTx MXene nanocomposites (NCs) on the surface of disposable laser-induced graphene (LIG) electrode. The structures and morphologies were confirmed by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and elemental analysis. The electrochemical performances of NCs were investigated by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and chronoamperometry (CA). The results demonstrated that both [email protected]/LIG and [email protected]/V2CTx MXene/LIG have excellent electrocatalytic activity for glucose oxidation in an alkaline medium. However, it was found that [email protected]/V2CTx MXene/LIG was easily oxidized. Hence, the combination of [email protected]/LIG was preferred for glucose test. Under optimized conditions, the electrochemical sensor achieved a detection range of 0.005 to 5.0 mM with a sensitivity of 1.124 × 106 μA mM−1 cm−2. The response time was 1.5 s and the limit of detection (LOD) was as low as 1.8 μM. The sensor has good selectivity and stability (84.12 % activity retained after 6 weeks). Its affordable price, disposable usage and portable essence are suitable for clinical application. Our study presented a novel strategy to the field of non-enzymatic glucose sensing.
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