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首页> 外文期刊>Bioprocess and Biosystems Engineering >Biomimetic oxidase sensor based on functionalized surface of carbon nanotubes and iron prophyrins for catechol detection
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Biomimetic oxidase sensor based on functionalized surface of carbon nanotubes and iron prophyrins for catechol detection

机译：基于碳纳米管和铁卟啉功能化表面的仿生氧化酶传感器用于儿茶酚检测

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摘要

A novel and highly stable biomimetic oxidase sensor system was designed for catehol detection. FePP used as biomimetic horseradish peroxidase (HRP) was immobilized onto modified multi-walled carbon nanotubes (MWCNTs). Functional groups such as -OH, -NH2 and -COOH were introduced onto the surface of MWCNTs to provide biomimetic microenvironment for iron porphyrins (FePP). Stable biomimetic enzyme electrode has been developed to detect catechol as a simple, economical and efficient method. At optimal condition, the detection limit of OH-MWCNTs/FePP/Nafion was 3.754x10(-6) M. After stored at - 4 degrees C for 35 days, the oxidation current value still maintained 98.3% of initial activity. In repetitive nature test, relative standard deviation (RSD) of oxidation current remained within 1.0% after ten consecutive measurements in the same concentration of catechol solution, while most of reported oxidase sensor was within 2.0% under the same condition.
机译：设计了一种新颖且高度稳定的仿生氧化酶传感器系统，用于儿茶酚检测。将用作仿生辣根过氧化物酶（HRP）的FePP固定在改性的多壁碳纳米管（MWCNT）上。将诸如-OH，-NH 2和-COOH的官能团引入到MWCNT的表面上，以提供用于卟啉铁（FePP）的仿生微环境。已经开发出稳定的仿生酶电极来检测邻苯二酚，这是一种简单，经济和有效的方法。在最佳条件下，OH-MWCNTs / FePP / Nafion的检出限为3.754x10（-6）M。在-4摄氏度下存储35天后，氧化电流值仍保持初始活性的98.3％。在重复性测试中，在相同浓度的邻苯二酚溶液中连续十次测量后，氧化电流的相对标准偏差（RSD）保持在1.0％以内，而在相同条件下，大多数报道的氧化酶传感器在2.0％以内。

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