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首页> 外文期刊>International Journal of Electrochemical Science >Nitrogen Doped Graphene-Core/shell CdS@TiO2 for Direct Electrochemistry of Hemoglobin and Hydrogen Peroxide Biosensor Application
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Nitrogen Doped Graphene-Core/shell CdS@TiO2 for Direct Electrochemistry of Hemoglobin and Hydrogen Peroxide Biosensor Application

机译：氮掺杂石墨烯核/壳CdS @ TiO 2 用于血红蛋白直接电化学和过氧化氢生物传感器的应用

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摘要

Core-shell CdS@TiO2 nanoparticles were synthesized and characterized by SEM, EDS. The asprepared core-shell nanoparticles and nitrogen doped graphene were utilized to promote the electrontransfer of hemoglobin. It is found that the nano-materials can effectively enhance the direct electrontransfer of hemoglobin with symmetrical peak separation of 50 mV and formal peak potential of -0.395 V, and it is also found the formal potential shifts with pH in the range of 4.0-9.0 with a slope of32 mV/pH to reveal a redox Bohr effect in the electron transfer process. The direct electron transfer(DET) of hemoglobin can also be estimated by heterogeneous electron transfer coefficient of 3.60 s-1.The proposed biosensor shows its favourable reproducibility, stability and low detection limit (5.4×10-8 mol/L) for hydrogen peroxide and Michealis-Menten constant of 0.012 mmol/L.
机译：合成了核壳型CdS @ TiO2纳米粒子，并用SEM，EDS表征。所制备的核-壳纳米粒子和氮掺杂石墨烯被用于促进血红蛋白的电子转移。发现纳米材料可以有效地增强血红蛋白的直接电子传递，对称峰分离为50 mV，形式峰电位为-0.395 V，并且还发现随着pH在4.0-9.0范围内形式电位转移具有32 mV / pH的斜率，以揭示电子转移过程中的氧化还原玻尔效应。血红蛋白的直接电子转移（DET）也可以通过3.60 s-1的异质电子转移系数来估算。该生物传感器显示出良好的重现性，稳定性和对过氧化氢的低检测限（5.4×10-8 mol / L） Michealis-Menten常数为0.012 mmol / L。

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