1. In-situ growth of graphene/polyaniline for synergistic improvement of extracellular electron transfer in bioelectrochemical systems.
- Author
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Sun DZ, Yu YY, Xie RR, Zhang CL, Yang Y, Zhai DD, Yang G, Liu L, and Yong YC
- Subjects
- Electrodes, Electron Transport, Electrons, Equipment Design, Models, Molecular, Shewanella cytology, Aniline Compounds chemistry, Bioelectric Energy Sources microbiology, Graphite chemistry, Shewanella metabolism
- Abstract
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/PANI
OS ). 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., (Copyright © 2016 Elsevier B.V. All rights reserved.)- Published
- 2017
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