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Synthesis and utilization of Co_3O_4 doped carbon nanofiber for fabrication of hemoglobin-based electrochemical sensor

机译：Co_3O_4掺杂的碳纳米纤维的合成及用于血红蛋白基电化学传感器的制备

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摘要

In this paper cobalt oxide (Co3O4) nanoparticles were mixed with polyacrylonitile to prepare Co3O4 doped carbon nanofiber (CNF) composite by electrospinning and carbonization, which was further used to modify on carbon ionic liquid electrode (CILE). Hemoglobin (Hb) was immobilized on Co3O4-CNF/CILE surface with Nafion acted as the protective film to fabricate an electrochemical biosensor (Nafion/Hb/Co3O4-CNF/CILE). Electrochemical behavior of Hb on the electrode was investigated with a pair of quasi-reversible redox peak appeared on cyclic voltammogram and electrochemical parameters were calculated. Moreover, this biosensor had good analytical capabilities for electrocatalytic reduction of different substrates including trichloroacetic acid, potassium bromate and sodium nitrite with wider detection range from 40.0 to 260.0 mmol L-1, 0.1 to 48.0 mmol L-1 and 1.0 to 12.0 mmol L-1 by cyclic voltammetry, respectively. The proposed method showed excellent anti-interferences ability with good selectivity and was successful used for quantitative detection of real samples, which displayed the potential applications to develop into a new analytical device.
机译：本文将氧化钴（Co3O4）纳米粒子与聚丙烯腈混合，通过静电纺丝和碳化制备了掺杂Co3O4的碳纳米纤维（CNF）复合材料，并进一步用于在碳离子液体电极（CILE）上进行改性。用Nafion作为保护膜将血红蛋白（Hb）固定在Co3O4-CNF / CILE表面上，以制备电化学生物传感器（Nafion / Hb / Co3O4-CNF / CILE）。用循环伏安图上出现的一对准可逆氧化还原峰研究了Hb在电极上的电化学行为，并计算了电化学参数。此外，该生物传感器具有良好的分析能力，可用于电催化还原三氯乙酸，溴酸钾和亚硝酸钠等不同底物，检测范围从40.0至260.0 mmol L-1、0.1至48.0 mmol L-1和1.0至12.0 mmol L-。通过循环伏安法分别为1。所提出的方法显示出优异的抗干扰能力和良好的选择性，并成功地用于真实样品的定量检测，这显示了开发新的分析设备的潜在应用。

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