Immobilization of glucose oxidase into polyaniline nanofiber matrix for biofuel cell applications

Hyeongseok Kim, Inseon Lee, Yongchai Kwon, Byoung Chan Kim, Su Ha, Jung heon Lee, Jungbae Kim

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

Glucose oxidase (GOx) was immobilized into the porous matrix of polyaniline nanofibers in a three-step process, consisting of enzyme adsorption, precipitation, and crosslinking (EAPC). EAPC was highly active and stable when compared to the control samples of enzyme adsorption (EA) and enzyme adsorption and crosslinking (EAC) with no step of enzyme precipitation. The GOx activity of EAPC was 9.6 and 4.2 times higher than those of EA and EAC, respectively. Under rigorous shaking at room temperature for 56days, the relative activities of EA, EAC and EAPC, defined as the percentage of residual activity to the initial activity, were 22%, 19% and 91%, respectively. When incubated at 50°C under shaking for 4h, EAPC showed a negligible decrease of GOx activity while the relative activities of EA and EAC were 45% and 48%, respectively. To demonstrate the feasible application of EAPC in biofuel cells, the enzyme anodes were prepared and used for home-built air-breathing biofuel cells. The maximum power densities of biofuel cells with EA and EAPC anodes were 57 and 292μW/cm2, respectively. After thermal treatment at 60°C for 4h, the maximum power density of EA and EAPC anodes were 32 and 315μW/cm2, representing 56% and 108% of initially obtained maximum power densities, respectively. Because the lower power densities and short lifetime of biofuel cells are serious problems against their practical applications, the present results with EAPC anode has opened up a new potential for the realization of practical biofuel cell applications.

Original languageEnglish
Pages (from-to)3908-3913
Number of pages6
JournalBiosensors and Bioelectronics
Volume26
Issue number9
DOIs
Publication statusPublished - 2011 May 15

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Bioelectric Energy Sources
Biological fuel cells
Nanofibers
Glucose Oxidase
Glucose oxidase
Polyaniline
Immobilization
Adsorption
Enzymes
Crosslinking
Catalyst activity
Anodes
Electrodes
polyaniline
Thermodynamic properties

Keywords

  • Enzyme precipitation
  • Enzyme stabilization
  • Enzyme-based biofuel cells
  • Glucose oxidase
  • Polyaniline nanofibers

ASJC Scopus subject areas

  • Biophysics
  • Biomedical Engineering
  • Biotechnology
  • Electrochemistry

Cite this

Immobilization of glucose oxidase into polyaniline nanofiber matrix for biofuel cell applications. / Kim, Hyeongseok; Lee, Inseon; Kwon, Yongchai; Kim, Byoung Chan; Ha, Su; Lee, Jung heon; Kim, Jungbae.

In: Biosensors and Bioelectronics, Vol. 26, No. 9, 15.05.2011, p. 3908-3913.

Research output: Contribution to journalArticle

Kim, Hyeongseok ; Lee, Inseon ; Kwon, Yongchai ; Kim, Byoung Chan ; Ha, Su ; Lee, Jung heon ; Kim, Jungbae. / Immobilization of glucose oxidase into polyaniline nanofiber matrix for biofuel cell applications. In: Biosensors and Bioelectronics. 2011 ; Vol. 26, No. 9. pp. 3908-3913.
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