Noncovalent Assembly of Picket-Fence Porphyrin on Carbon Nanotubes as Effective Peroxidase-Like Catalysts for Detection of Hydrogen Peroxide in Beverages
✍ Scribed by Xiao-Rong Li; Bo Wang; Jing-Juan Xu; Hong-Yuan Chen
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 594 KB
- Volume
- 23
- Category
- Article
- ISSN
- 1040-0397
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✦ Synopsis
A newly developed electrochemical sensor for determination of hydrogen peroxide (H 2 O 2 ) in beverages using a water-insoluble picket-fence porphyrin (FeTpivPP) functionalized multiwalled carbon nanotubes (MWNTs) is demonstrated. Introduction of FeTpivPP on MWNTs led to enhanced electron transfer. As a new platform in electrochemical analysis, the resultant sensor showed excellent electrocatalytic activity toward the reduction of H 2 O 2 due to the synergic effect between MWNTs and FeTpivPP, thus leading to highly sensitive amperometric sensing of H 2 O 2 with a detection limit of 0.05 mmol L À1 . The developed method is successfully used to detect H 2 O 2 in beverages and shows great promise for routine sensing applications.