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Electrode Modification and Optimization in Air-Cathode Single-Chamber Microbial Fuel Cells.
Int J Environ Res Public Health. 2018 06 27; 15(7)IJ

Abstract

Due to the known problems of microbial fuel cells (MFCs), such as low electricity generation performance and high cost of operation, we modified the electrode with graphene and polyaniline (PANI) is a single-chamber air-cathode MFC and then evaluated the effects of electrode modification on MFC electricity generation performance. Carbon cloth electrodes (unmodified, CC; graphene-modified, G/CC; and polyaniline-graphene-modified, PANI-G/CC) were prepared using the impregnation method. Sulfonated cobalt phthalocyanine (CoPcS) was then introduced as a cathode catalyst. The Co-PANI-G/CC cathode showed higher catalytic activity toward oxygen reduction compared with other electrodes. The maximum power density of the MFC with Co-PANI-G/CC cathode was 32.2 mW/m², which was 1.8 and 6.1 times higher than the value obtained with Co-G/CC and Co/CC cathodes, respectively. This indicates a significant improvement in the electricity generation of single-chamber MFCs and provides a simple, effective cathode modification method. Furthermore, we constructed single-chamber MFCs using the modified anode and cathode and analyzed electricity generation and oxytetracycline (OTC) degradation with different concentrations of OTC as the fuel. With increasing added OTC concentration, the MFC performance in both electricity generation and OTC degradation gradually decreased. However, when less than 50 mg/L OTC was added, the 5-day degradation rate of OTC reached more than 90%. It is thus feasible to process OTC-containing wastewater and produce electricity using single-chamber MFCs, which provides a new concept for wastewater treatment.

Authors+Show Affiliations

School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China. yhwang930@foxmail.com. Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China. yhwang930@foxmail.com.School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China. jiayan1226@foxmail.com.Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China. ysk110@126.com.Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China. li395820930@foxmail.com.School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China. lixiaoping@snnu.edu.cn.

Pub Type(s)

Evaluation Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

29954125

Citation

Wang, Yanhua, et al. "Electrode Modification and Optimization in Air-Cathode Single-Chamber Microbial Fuel Cells." International Journal of Environmental Research and Public Health, vol. 15, no. 7, 2018.
Wang Y, Wu J, Yang S, et al. Electrode Modification and Optimization in Air-Cathode Single-Chamber Microbial Fuel Cells. Int J Environ Res Public Health. 2018;15(7).
Wang, Y., Wu, J., Yang, S., Li, H., & Li, X. (2018). Electrode Modification and Optimization in Air-Cathode Single-Chamber Microbial Fuel Cells. International Journal of Environmental Research and Public Health, 15(7). https://doi.org/10.3390/ijerph15071349
Wang Y, et al. Electrode Modification and Optimization in Air-Cathode Single-Chamber Microbial Fuel Cells. Int J Environ Res Public Health. 2018 06 27;15(7) PubMed PMID: 29954125.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Electrode Modification and Optimization in Air-Cathode Single-Chamber Microbial Fuel Cells. AU - Wang,Yanhua, AU - Wu,Jiayan, AU - Yang,Shengke, AU - Li,Huihui, AU - Li,Xiaoping, Y1 - 2018/06/27/ PY - 2018/04/27/received PY - 2018/06/06/revised PY - 2018/06/06/accepted PY - 2018/6/30/entrez PY - 2018/6/30/pubmed PY - 2019/1/19/medline KW - catalyst KW - electrode optimization KW - modified electrode KW - oxytetracycline KW - single-chamber microbial fuel cells JF - International journal of environmental research and public health JO - Int J Environ Res Public Health VL - 15 IS - 7 N2 - Due to the known problems of microbial fuel cells (MFCs), such as low electricity generation performance and high cost of operation, we modified the electrode with graphene and polyaniline (PANI) is a single-chamber air-cathode MFC and then evaluated the effects of electrode modification on MFC electricity generation performance. Carbon cloth electrodes (unmodified, CC; graphene-modified, G/CC; and polyaniline-graphene-modified, PANI-G/CC) were prepared using the impregnation method. Sulfonated cobalt phthalocyanine (CoPcS) was then introduced as a cathode catalyst. The Co-PANI-G/CC cathode showed higher catalytic activity toward oxygen reduction compared with other electrodes. The maximum power density of the MFC with Co-PANI-G/CC cathode was 32.2 mW/m², which was 1.8 and 6.1 times higher than the value obtained with Co-G/CC and Co/CC cathodes, respectively. This indicates a significant improvement in the electricity generation of single-chamber MFCs and provides a simple, effective cathode modification method. Furthermore, we constructed single-chamber MFCs using the modified anode and cathode and analyzed electricity generation and oxytetracycline (OTC) degradation with different concentrations of OTC as the fuel. With increasing added OTC concentration, the MFC performance in both electricity generation and OTC degradation gradually decreased. However, when less than 50 mg/L OTC was added, the 5-day degradation rate of OTC reached more than 90%. It is thus feasible to process OTC-containing wastewater and produce electricity using single-chamber MFCs, which provides a new concept for wastewater treatment. SN - 1660-4601 UR - https://www.unboundmedicine.com/medline/citation/29954125/Electrode_Modification_and_Optimization_in_Air_Cathode_Single_Chamber_Microbial_Fuel_Cells_ L2 - http://www.mdpi.com/resolver?pii=ijerph15071349 DB - PRIME DP - Unbound Medicine ER -