Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 219, Issue -, Pages 361-369Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.04.128
Keywords
Polymeric ionic liquid; Multi-walled carbon nanotubes; Ascorbic acid; Dopamine; Uric acid; Simultaneous determination
Funding
- National Natural Science Foundation of China [21475051]
Ask authors/readers for more resources
A thermal-initiation-free radical (polymeric ionic liquids (PIL)) reaction (multi-walled carbon nanotube (MWCNT)) was involved to form polymeric ionic liquids (PIL) layer on multi-walled carbon nanotube (MWCNT), which was designed as an efficient electrode modifier for simultaneous determination of ascorbic acid (AA), dopamine (DA) and uric acid (UA). The peak separation of AA-DA, DA-UA and AA-UA was 200 mV, 120 mV and 320 mV, respectively, accompanied by 5.9, 5.3 and 3.7 folds current for AA, DA and UA compared to the pristine-MWCNTs/GCE. The positive imidazole-functional groups along the PIL chains were supposed to be responsible for the oxidation separation of these biomolecules. Selectively and sensitively simultaneous determination of AA, DA and UA was successfully accomplished by differential pulse voltammetry, displaying a linear response from 3.0 to 1500 mu M, 10.0 to 600 mu M and 2.0 to 60 mu M for each biomolecule with a detection limit (S/N = 3) of 1.65 mu M, 2.01 mu M and 0.46 mu M, respectively. The present study not only provides functionalized MWCNTs with desirable interfacial performances, but also highlights the great potential of these functionalized tubular nanomaterials in the fields of electrocatalysis and sensing applications. (C) 2015 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available