期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 665, 期 -, 页码 882-889出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2019.02.082
关键词
Bioelectrochemical systems; Hierarchical honeycomb-like structure; Carbon cloth; Shewanella oneidensis; Extracellular electron transfer
资金
- National Natural Science Foundation of China [51678162, 51676194]
- Guangzhou University-industry Collaborative Innovation Major Projects [2016201604030077]
- Major Program of Higher Education of Guangdong [2017KZDXM029]
- Youth Innovation Promotion Association CAS [2014320]
Modifying the surface of an anode can improve electron transfer, thus enhancing the performance of the associated bioelectrochemical system. In this study, a porous N-doped carbon cloth electrodewas obtained via a simple thermal reduction and etching treatment, and then used as the anode in a bioelectrochemical system. The electrode has a high nitrogen-to-carbon (N/C) ratio (similar to 3.9%) and a large electrochemically active surface area (145.4 cm(2), about 4.4 times higher than that of the original carbon cloth), which increases the bacterial attachment and provides more active sites for extracellular electron transfer. Electrochemical characterization reveals that the peak anodic current (0.71 mA) of the porous N-doped carbon cloth electrode in riboflavin is 18 times higher than that of the original carbon cloth electrode (0.04 mA), confirming the presence of more electroactive sites for the redox reaction. We also obtained a maximum current density of 0.29 mA/cm(2) during operation of a bioelectrochemical system featuring the porous N-doped carbon cloth electrode, which is 14.5 times higher than that of the original carbon cloth electrode. This result demonstrates that the adoption of our new electrode is a viable strategy for boosting the performance of bioelectrochemical systems. (c) 2019 Published by Elsevier B.V.
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