期刊
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
卷 171, 期 5, 页码 1194-1202出版社
HUMANA PRESS INC
DOI: 10.1007/s12010-013-0188-0
关键词
Glucose oxidase; Carbon nanotubes; Cellulose; Direct electron transfer; Ionic liquid; Biofuel cells
资金
- Original Technology Research Program for Brain Science through the National Research Foundation of Korea (NRF) [2012-0006591]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) [2010-0004228]
- Converging Research Center Program through the National Research Foundation of Korea (NRF) [2009-0082832]
- Ministry of Education, Science and Technology
- Korea Ministry of Environment
- Converging Technology Project [2012-000620001]
- Agriculture Research Center (ARC) program of the Ministry for Food, Agriculture, Forestry and Fisheries, Korea [710003-03-3-SB120]
- National Research Foundation of Korea [2010-0004228] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Biofuel cells are devices for generating electrical energy directly from chemical energy of renewable biomass using biocatalysts such as enzymes. Efficient electrical communication between redox enzymes and electrodes is essential for enzymatic biofuel cells. Carbon nanotubes (CNTs) have been recognized as ideal electrode materials because of their high electrical conductivity, large surface area, and inertness. Electrodes consisting entirely of CNTs, which are known as CNT paper, have high surface areas but are typically weak in mechanical strength. In this study, cellulose (CL)-CNT composite paper was fabricated as electrodes for enzymatic biofuel cells. This composite electrode was prepared by vacuum filtration of CNTs followed by reconstitution of cellulose dissolved in ionic liquid, 1-ethyl-3-methylimidazolium acetate. Glucose oxidase (GOx), which is a redox enzyme capable of oxidizing glucose as a renewable fuel using oxygen, was immobilized on the CL-CNT composite paper. Cyclic voltammograms revealed that the GOx/CL-CNT paper electrode showed a pair of well-defined peaks, which agreed well with that of FAD/FADH(2,) the redox center of GOx. This result clearly shows that the direct electron transfer (DET) between the GOx and the composite electrode was achieved. However, this DET was dependent on the type of CNTs. It was also found that the GOx immobilized on the composite electrode retained catalytic activity for the oxidation of glucose.
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