Journal
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
Volume 80, Issue -, Pages 135-140Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.msec.2017.05.129
Keywords
Hemoglobin; Graphene-palladium nanocomposite; Direct electrochemistry; Electrocatalysis
Categories
Funding
- National Natural Science Foundation of China [21365010, 21665007]
- Program for Innovative Research Team in University [IRT-16R19]
- National Natural Science Foundation of Hainan Province [2017CXTD007]
- Fundamental Research Funds for the Central Universities [30916014103]
- Science and Research Key Project of Universities of Hainan Province [Hnky2016ZD-10]
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Palladium-graphene (Pd-GR) nanocomposite was acted as modifier for construction of the modified electrode with direct electrochemistry of hemoglobin (Hb) realized. By using Nafion as the immobilization film, Hb was fixed tightly on Pd-GR nanocomposite modified carbon ionic liquid electrode. Electrochemical behaviors of Hb modified electrode were checked by cyclic voltammetry and a pair of redox peaks originated from direct electron transfer of Hb was appeared. The Hb modified electrode had excellent electrocatalytic activity to the reduction of trichloroacetic acid and sodium nitrite in the concentration range from 0.6 to 13.0 mmol . L-1 and from 0.04 to 0.5 mmol . L-1. Therefore Pd-GR nanocomposite was proven to be a good candidate for the fabrication of third-generation electrochemical biosensor. (C) 2017 Elsevier B.V. All rights reserved.
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