期刊
CHEMOSPHERE
卷 196, 期 -, 页码 476-481出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2017.12.166
关键词
Bioelectrochemical systems; Stainless steel; Photoanode; Illumination; Current generation
资金
- National Natural Science Foundation of China [51608480]
- Natural Science Foundation of Zhejiang Province of China [LQ16E080001]
- Open Foundation of Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University)
- Ministry of Education of China [SWMES 2015-07]
- Youth Foundation of Zhejiang Gongshang University [QZ15-3]
This study reports a high-performance 3D stainless-steel photoanode (3D SS photoanode) for bio-electrochemical systems (BESs). The 3D SS photoanode consists of 3D carbon-coated SS felt bioactive side and a flat alpha-Fe2O3-coated SS plate photoactive side. Without light illumination, the electrode reached a current density of 26.2 +/- 1.9 A m(-2), which was already one of the highest current densities reported thus far. Under illumination, the current density of the electrode was further increased to 46.5 +/- 2.9 A m(-2). The mechanism of the photo-enhanced current production can be attributed to the reduced charge-transfer resistance between electrode surface and the biofilm with illumination. It was also found that long-term light illumination can enhance the biofilm formation on the 3D SS photoanode. These findings demonstrate that using the synergistic effect of photocatalysis and microbial electrocatalysis is an efficient way to boost the current production of the existing high-performance 3D anodes for BESs. (C) 2017 Elsevier Ltd. All rights reserved.
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