- Title
- In situ fabrication of green reduced graphene-based biocompatible anode for efficient energy recycle
- Creator
- Cheng, Ying; Mallavarapu, Megharaj; Naidu, Ravi; Chen, Zuliang
- Relation
- Chemosphere Vol. 193, p. 618-624
- Publisher Link
- http://dx.doi.org/10.1016/j.chemosphere.2017.11.057
- Publisher
- Pergamon Press
- Resource Type
- journal article
- Date
- 2018
- Description
- Improving the anode configuration to enhance biocompatibility and accelerate electron shuttling is critical for efficient energy recovery in microbial fuel cells (MFCs). In this paper, green reduced graphene nanocomposite was successfully coated using layer-by-layer assembly technique onto carbon brush anode. The modified anode achieved a 3.2-fold higher power density of 33.7 W m−3 at a current density of 69.4 A m−3 with a 75% shorter start period. As revealed in the characterization, the green synthesized nanocomposite film affords larger surface roughness for microbial colonization. Besides, gold nanoparticles, which anchored on graphene sheets, promise the relatively high electroactive sites and facilitate electron transfer from electricigens to the anode. The reduction-oxidation peaks in cyclic voltammograms indicated the mechanism of surface cytochromes facilitated current generation while the electrochemical impedance spectroscopy confirmed the enhanced electron transfer from surface cytochrome to electrode. The green synthesis process has the potential to generate a high performing anode in further applications of MFCs.
- Subject
- biocompatible anode; green synthesis; microbial fuel cell; graphene; gold nanoparticles; layer-by-layer assembly
- Identifier
- http://hdl.handle.net/1959.13/1401742
- Identifier
- uon:34954
- Identifier
- ISSN:0045-6535
- Rights
- © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
- Language
- eng
- Full Text
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