首页|Ni-Co基纳米针簇无酶葡萄糖电化学传感器性能研究

Ni-Co基纳米针簇无酶葡萄糖电化学传感器性能研究

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对Ni-Co基前驱体材料分别进行氧化和硫化处理,制备了尖晶石结构的NiCo2O4和NiCo2S4纳米针簇,并将合成材料作为电催化剂修饰于氧化铟锡(ITO)导电玻璃表面以构建无酶葡萄糖电化学传感电极.通过电化学表征技术,研究Ni-Co基双金属化合物的阴离子种类对其电催化氧化葡萄糖的性能影响.结果表明,基于NiCo2S4的传感电极具有更高的电催化活性,更快的电子转移速率.NiCo2O4/ITO电极在0.1~0.7 mmol/L的线性范围内灵敏度为81.8 μA/(mmol/L)·cm2,而NiCo2S4/ITO电极的线性范围为0.1~2.0 mmol/L,且灵敏度提升至 166.8 μA/(mmol/L)·cm2.NiCo2S4/ITO 电极选择性、稳定性和重现性良好,在血糖检测中具有较好的应用前景.
Non-enzymatic Glucose Electrochemical Sensing Electrode Based on NiCo2O4 and NiCo2S4
NiCo2 O4 and NiCo2 S4 nanoneedle clusters with spinel structure were synthesized by oxidation and sulfuration of Ni-Co precursor,respectively.The products were applied as electrocatalyst and modified on indium tin oxide(ITO)conductive glass to construct non-enzymatic glucose sensing electrode.The effects of anion species in Ni-Co bimetallic compounds on the electrocatalytic oxidation of glucose were investigate.The results indicated that NiCo2 S4 based sensing electrodes had higher electrocatalytic activity and faster electron transfer rate than those of NiCo2O4.NiCo2O4/ITO electrode displayed a sensitivity of 81.8 μA/(mmol/L)·cm2 in the linear range of 0.1-0.7 mmol/L.In comparison,NiCo2S4/ITO electrode owned a larger linear range within 0.1-2.0 mmol/L and the sensitivity of NiCo2S4/ITO electrode increased to 166.8 μA/(mmol/L)·cm2.Moreover,great selectivity,stability and reproducibility were also obtained by the NiCo2 S4/ITO electrode,indicating the good application prospect in the glucose detection.

AnionsBimetallic compoundsElectrochemical sensingGlucose

胡雨润、李涛、戴冰冰、韦晨慧楠、刘启明

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湖北工业大学材料与化学工程学院,湖北武汉 430068

武汉大学物理科学与技术学院,湖北武汉 430072

阴离子 双金属化合物 电化学传感 葡萄糖

国家自然科学基金湖北省自然科学基金

522012132021CFB271

2024

分析科学学报
武汉大学,北京大学,南京大学

分析科学学报

CSTPCD北大核心
影响因子:0.717
ISSN:1006-6144
年,卷(期):2024.40(3)
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