Direct Electrochemistry of Hemoglobin on the Electrode Modified with DDAB and SWCNT

Authors

Wen-jing HOU, Department of Chemistry,Shanghai Normal University,Shanghai 200234,China;
Lin ZHOU, Department of Chemistry,Shanghai Normal University,Shanghai 200234,China;
Xia-qin WU, Department of Chemistry,Shanghai Normal University,Shanghai 200234,China;
Hong-xia ZHANG, Department of Chemistry,Shanghai Normal University,Shanghai 200234,China;
Wen XIE, Department of Chemistry,Shanghai Normal University,Shanghai 200234,China;
Liu YANG, Department of Chemistry,Shanghai Normal University,Shanghai 200234,China;
Zhong-qing LU, Department of Chemistry,Shanghai Normal University,Shanghai 200234,China;

Abstract

Hemoglobin(Hb) was immobilized onto the surface of glassy carbon electrode with the single-wall carbon nanotubes and surfactant didodecyldimethylamonium bromide(DDAB) modified previously and its electrochemical behaviors have been investigated by cyclic voltammetry.A pair of well-defined redox peaks has been obtained.Cyclic voltammetry and electrochemical impedance spectroscopy(EIS) were also used to study on the effect of different concentration of SWCNT in DDAB.The result shows that the 1 mg/mL is the best choice.The dependence of E0' on solution pH with the slope of 39 mV/pH,indicated that redox of the Hb is a one electron reaction with two protons transfer.The results also showed that the immobilized Hb keeped its electrocatalytic activity toward the reduction of O2.

Keywords

hemoglobin(Hb), single-wall carbon nano-tube(SWCNT), didodecyldimethylamonium bromide(DDAB), direct electron transfer, cyclic voltammetry, electrochemical impedance spectroscopy

DOI Link

https://doi.org/10.61558/2993-074X.1902

Publication Date

2008-08-28

Online Available Date

2008-08-28

Revised Date

2008-08-28

Received Date

2008-08-28

Recommended Citation

Wen-jing HOU, Lin ZHOU, Xia-qin WU, Hong-xia ZHANG, Wen XIE, Liu YANG, Zhong-qing LU. Direct Electrochemistry of Hemoglobin on the Electrode Modified with DDAB and SWCNT[J]. Journal of Electrochemistry, 2008 , 14(3): 258-262.
DOI: 10.61558/2993-074X.1902
Available at: https://jelectrochem.xmu.edu.cn/journal/vol14/iss3/6