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| Type |
Poster Presentation |
| Area |
Electrochemistry |
| Room No. |
Exhibition Hall 2 |
| Time |
4월 18일 (목요일) 11:00~12:30 |
| Code |
ELEC.P-471 |
| Subject |
Noticeable photocurrent generation through improved electrochemical communication between cyanobacteria and electrode |
| Authors |
Hyejun Cho, Jinhwan Lee1, Sunghyun Kim2,*
Konkuk University, Korea
1Department of Biotechnology, Konkuk University, Korea
2Biotechnology, Konkuk University, Korea
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| Abstract |
There is a growing interest in using photosynthetic microorganisms for converting solar energy to electrical energy aiming at practical application. Despite extensive research using different microorganisms, however, existing methods have been suffered from limited photocurrent for that purpose. Here, we report that appreciable photocurrent could be generated in a photo-bioelectrochemical cell (PBEC) where cyanobacterium Anabaena variabilis (A. variabilis) was used as a photo-biocatalyst that oxidizes water by solar light to produce electrons. The PBEC was composed of reduced graphene oxide-coated indium tin oxide electrode, A. variabilis, and an electron mediator. When A. variabilis was dispersed in solution and 1,4-benzoquinone was used as a redox mediator, our PBEC produced appreciable photocurrent of 213 μA cm2 at an applied potential of 0.4 V vs. Ag/AgCl, which is far greater than reported results, most of which use cyanobacterial biofilms on the electrode surface. The effects of mediator concentration and operating temperature on the photocurrent have also been examined. Methodology in this study could be extended to cover other cyanobacteria, electrode materials, and mediators to further enhance photocurrent. Our results demonstrate a possibility of utilizing cyanobacteria that are ubiquitous in environment as alternative energy sources. |
| E-mail |
chohyejoon@naver.com |
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123rd General Meeting of the KCS