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电化学  2011 

基于聚酚藏花红功能碳纳米管生物阳极的制备及其在乙醇传感中的应用研究(英文)

, PP. 263-270

Keywords: 酚藏花红(PS),电化学聚合,烟酰胺辅酶(NADH),单壁碳纳米管(SWCNT),电催化

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Abstract:

本文利用电化学聚合酚藏花红(PPS)功能化单壁碳纳米管作为烟酰胺辅酶(NADH)氧化的电化学催化剂,研制了基于乙醇脱氢酶的安培型乙醇生物电化学传感器。PPS通过在酚藏花红的溶液电化学聚合得到,在0.0V时对NADH具有很好的催化性能。单体酚藏花红则由于电化学电位太低(-0.48V)而对NADH没有催化性能。所制备的传感器的性能通过循环伏安和计时安培法来表征。实验结果表明:碳纳米管的载量,固定化酶的量,NAD+的浓度以及溶液的pH都直接影响传感器的性能。在优化的条件下,所制备的乙醇传感器在0.2V的电位下,对乙醇响应的灵敏度为2.0μAcm-2mM–1,检测限为36μM。所制备的传感器具有很好的稳定性,连续测定45min后响应电流下降值只是起始响应值的7%。本文的研究为电化学生物传感器的研究提供了新的思路

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