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Transport of Surface-modified Carbon Nanotubes through a Soil Column
Published on: April 2, 2015
Biomimetic oxidase sensor based on functionalized surface of carbon nanotubes and iron prophyrins for catechol
Zou Bin1, Chu Yanhong2, Xia Jiaojiao3
1School of Food and Biological Engineering, Jiangsu University, No. 301 Xuefu Road, Zhenjiang, 212013, China. binzou2009@ujs.edu.cn.
Abstract:
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 3.754 × 10- 6 M. After stored at - 4 °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.
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