We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
A glassy carbon electrode modified with SnO nanofibers, polyaniline and hemoglobin for improved amperometric sensing of hydrogen peroxide.
- Authors
Kafi, A.; Wali, Qamar; Jose, Rajan; Biswas, Tapan; Yusoff, Mashitah
- Abstract
The authors describe a glassy carbon electrode (GCE) modified with a multiporous nanofibers prepared from SnO, polyaniline and hemoglobin, and its application to the amperometric determination of hydrogen peroxide (HO). The SnO nanofibers were prepared first and then polymerized with polyaniline. Then, the redox protein hemoglobin was co-immobilized with the nanofibers on the surface of the GCE. Chitosan was finally used to improve the stability of the modified GCE. Direct electrochemistry of Hemoglobin at the modified electrode revealed a pair of well-defined redox peaks, with anodic and cathodic peaks at −0.15 and −0.3 V, respectively. The modified GCE exhibits high catalytic response to hydrogen peroxide. Best operated at −0.4 V (vs Ag/AgCl), it displays a linear amperometric response that covers the 2 to 160 μM HO concentration range, with a lower detection limit of 0.5 μM. The biosensor has good storage stability, reproducibility and repeatability.
- Subjects
CARBON electrodes; NANOFIBERS; TIN oxides; POLYANILINES; HEMOGLOBINS; AMPEROMETRIC sensors; HYDROGEN peroxide
- Publication
Microchimica Acta, 2017, Vol 184, Issue 11, p4443
- ISSN
0026-3672
- Publication type
Article
- DOI
10.1007/s00604-017-2479-6