Abstract
A novel biocompatible composite film containing sodium alginate (SA), room temperature ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF6), SiO2 nanoparticle, and hemoglobin (Hb) was fabricated and covered on the surface of a traditional carbon paste elecrode (CPE). The immobilized Hb on the electrode surface showed good direct electrochemical behaviors, and a pair of quasi-reversible redox peaks of Hb was obtained, which indicated that the direct electron transfer of Hb with the electrode surface had been achieved. The SA/nano-SiO2/BMIMPF6/Hb/CPE showed dramatically electrocatalytic activity to the reduction of trichloroacetic acid, hydrogen peroxide (H2O2), and oxygen (O2). The kinetic parameters for the electrocatalytic reactions were evaluated. The composite film showed the potential to the biosensor and biocatalysis.
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Acknowledgments
We are grateful to the financial support of the National Natural Science Foundation of China (No. 20405008, 20635020) and the Open Foundation of State Key Laboratory of Chemo/Biosensing and Chemometrics of Hunan University (200615).
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Sun, W., Wang, D., Zhong, J. et al. Electrocatalytic activity of hemoglobin in sodium alginate/SiO2 nanoparticle/ionic liquid BMIMPF6 composite film. J Solid State Electrochem 12, 655–661 (2008). https://doi.org/10.1007/s10008-007-0395-0
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DOI: https://doi.org/10.1007/s10008-007-0395-0