| 摘要: |
| 利用低温下的水化学生长法合成了镍钴氧化物（NiCo2O4）纳米针，因其自组装而表现出立方晶相，再用二氧化钛/炭黑（TiO2/CB）对NiCo2O4表面进行了改性，合成了TiO2/CB-NiCo2O4复合纳米材料.用X射线光电子能谱仪（XPS）、扫描电子显微镜（SEM）、能量色散X射线光谱仪（EDX）图谱对材料的形貌进行了表征，运用循环伏安法（CV）、时间-电流（i-t）曲线法考察了TiO2/CB-NiCo2O4修饰玻碳电极的电化学行为.实验发现：TiO2/CB-NiCo2O4修饰电极对葡萄糖的氧化有良好的电催化性能，其线性范围为0.001~1.780 mmol·L-1，检测限为0.53 μmol·L-1（信噪比S/N=3）.将该法用于实际样品中葡萄糖的测定，结果令人满意. |
| 关键词: 二氧化钛/炭黑(TiO2/CB) 镍钴氧化物(NiCo2O4) 葡萄糖(glucose) 电化学 修饰电极 |
| DOI：10.3969/J.ISSN.1000-5137.2022.05.005 |
| 分类号:TP242 |
| 基金项目: |
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| Preparation of TiO2/CB-NiCo2O4nanocomposites modified glassy carbon electrode and its application for electrochemical determination of glucose |
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LYU Mengmeng, CAI Wenjing, ZHUANG Chen, ZHU Ningning
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College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, China
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| Abstract: |
| Nickel-cobalt oxide(NiCo2O4) nanoneedles were synthesized by hydration method at low temperature, which showed cubic crystal phase due to its self-assembly. Then, the surface of NiCo2O4 was modified by titanium dioxide/carbon black(TiO2/CB) to synthesize TiO2/CB-NiCo2O4composite nanomaterials. The as-prepared materials were characterized by X-ray photoelectron spectromscanning (XPS), electron microscope(SEM) and energy dispersive X-ray detector(EDX). The electrochemical behavior of TiO2/CB-NiCo2O4 modified glassy carbon electrode was investigated by cyclic voltammetry(CV) and current-time curve(i-t). It was found that TiO2/CB-NiCo2O4 modified electrode had good electrocatalytic performance for glucose oxidation with a linear range from 0.001 to 1.780 mmol·L-1and a detection limit of 0.53 μmol·L-1 (signal-to noise ratio S/N=3). The method has been applied to the determination of glucose in real samples with satisfactory results. |
| Key words: titanium dioxide/carbon black(TiO2/CB) nickel-cobalt oxide(NiCo2O4) glucose electrochemical modified electrode |
