In-situ growth of graphene/polyaniline for synergistic improvement of extracellular electron transfer in bioelectrochemical systems
| Autor: | Yuan Yang, Yang-Yang Yu, Rong-Rong Xie, De-Zhen Sun, Chun-Lian Zhang, Yang-Chun Yong, Lei Liu, Dan-Dan Zhai, Guodong Yang |
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| Rok vydání: | 2016 |
| Předmět: |
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Molecular Shewanella Materials science Bioelectric Energy Sources Composite number Biomedical Engineering Biophysics Nanotechnology Electrons 02 engineering and technology 010402 general chemistry Electrochemistry 01 natural sciences law.invention Electron Transport chemistry.chemical_compound Electron transfer law Polyaniline Graphite Shewanella oneidensis Electrodes Aniline Compounds biology Graphene General Medicine Equipment Design 021001 nanoscience & nanotechnology biology.organism_classification Exfoliation joint 0104 chemical sciences chemistry 0210 nano-technology Biotechnology |
| Zdroj: | Biosensorsbioelectronics. 87 |
| ISSN: | 1873-4235 |
| Popis: | Graphene composite has been widely used in various bioelectrochemical systems (BES). However, it is suffered from tedious fabrication procedure and ambiguous mechanism for its effect on BES. Here, a one-step and in-situ strategy for simultaneously graphene exfoliation and aniline polymerization was developed for fabrication of graphene/PANI composite electrode (GO/PANIOS). This GO/PANIOS outperformed graphite paper (GP), GP with PANI (GP/PANI) and GP with electrochemical exfoliated graphene (GOH2SO4) in Shewanella oneidensis MR-1 inoculated BES (improved the power density output, i.e., 24, 3.4 and 5.7 times of GP , GP/PANI and GOH2SO4, respectively). Further analysis revealed a synergistic improvement on both direct and mediated extracellular electron transfer of S. oneidensis MR-1 by GO/PANIOS contributed to its performance enhancement in BES. This work not only provided a simple strategy for graphene composite fabrication, but also unveiled the underlying mechanism for its stimulation on BES, which promises new opportunity of graphene composite application in various biosystems. |
| Databáze: | OpenAIRE |
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