Self-Nitrogen-Doped Carbon Nanosheets Modification of Anodes for Improving Microbial Fuel Cells’ Performance
Dandelion seeds (DSs) have the advantages of high nitrogen content, low cost and easy availability and thus are ideal carbon precursors for fabricating carbon nanomaterials. Herein, this paper prepared a carbon nanosheet material by one-step carbonizing DSs with KOH activation (self-doped-nitrogen p...
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| Format: | Article |
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MDPI AG
2020-04-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/10/4/381 |
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| author | Xiaoye Xing Zhongliang Liu Wenwen Chen Xiaoge Lou Yanxia Li Qiang Liao |
| author_facet | Xiaoye Xing Zhongliang Liu Wenwen Chen Xiaoge Lou Yanxia Li Qiang Liao |
| author_sort | Xiaoye Xing |
| collection | DOAJ |
| description | Dandelion seeds (DSs) have the advantages of high nitrogen content, low cost and easy availability and thus are ideal carbon precursors for fabricating carbon nanomaterials. Herein, this paper prepared a carbon nanosheet material by one-step carbonizing DSs with KOH activation (self-doped-nitrogen porous carbon nanosheets (N-CNS)) and without KOH activation (unactivated self-doped-nitrogen porous carbon nanosheets (N-UA-CNS)), which could dope nitrogen atoms directly into carbon materials without additional processes. Scanning electron microscopy(SEM) images and X-ray diffraction(XRD) patterns both showed that N-CNS was of macro-porous structure, and beneficial for microorganisms’ growth. The Brunauer Emmett Teller(BET) surface area of N-CNS was 2107.5 m<sup>2</sup> g<sup>−1</sup>, which was much higher than that of N-UA-CNS. After carbon clothes were modified by the obtained materials, the internal resistance of both N-CNS-modified carbon cloth (N-CNS-CC) and N-UA-CNS-modified carbon cloth (N-UA-CNS-CC) was greatly reduced and was found to be only 2.7 Ω and 4.0 Ω, respectively which are all significantly smaller than that of blank carbon cloth (65.1 Ω). These electrodes were assembled in microbial fuel cells (MFCs) as anode, and the operation experiments showed that the N-CNS modification shortened start-up time, improved output stability and increased maximum output voltage significantly. The maximum power density of N-CNS-CC MFC was 1122.41 mW m<sup>−2</sup> which was 1.3 times of that of N-UA-CNS-CC MFC and 1.6 times of that of CC MFC. The results demonstrated that N-CNS was an ideal modification material for fabricating MFC anodes with simple preparation process and low cost. |
| first_indexed | 2024-03-10T20:44:48Z |
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| language | English |
| last_indexed | 2024-03-10T20:44:48Z |
| publishDate | 2020-04-01 |
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| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-4e6ab5c844cd4049903770c37db6acd82023-11-19T20:22:10ZengMDPI AGCatalysts2073-43442020-04-0110438110.3390/catal10040381Self-Nitrogen-Doped Carbon Nanosheets Modification of Anodes for Improving Microbial Fuel Cells’ PerformanceXiaoye Xing0Zhongliang Liu1Wenwen Chen2Xiaoge Lou3Yanxia Li4Qiang Liao5Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, College Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, ChinaKey Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, College Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, ChinaKey Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, College Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, ChinaKey Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, College Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, ChinaKey Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, College Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, ChinaKey Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400030, ChinaDandelion seeds (DSs) have the advantages of high nitrogen content, low cost and easy availability and thus are ideal carbon precursors for fabricating carbon nanomaterials. Herein, this paper prepared a carbon nanosheet material by one-step carbonizing DSs with KOH activation (self-doped-nitrogen porous carbon nanosheets (N-CNS)) and without KOH activation (unactivated self-doped-nitrogen porous carbon nanosheets (N-UA-CNS)), which could dope nitrogen atoms directly into carbon materials without additional processes. Scanning electron microscopy(SEM) images and X-ray diffraction(XRD) patterns both showed that N-CNS was of macro-porous structure, and beneficial for microorganisms’ growth. The Brunauer Emmett Teller(BET) surface area of N-CNS was 2107.5 m<sup>2</sup> g<sup>−1</sup>, which was much higher than that of N-UA-CNS. After carbon clothes were modified by the obtained materials, the internal resistance of both N-CNS-modified carbon cloth (N-CNS-CC) and N-UA-CNS-modified carbon cloth (N-UA-CNS-CC) was greatly reduced and was found to be only 2.7 Ω and 4.0 Ω, respectively which are all significantly smaller than that of blank carbon cloth (65.1 Ω). These electrodes were assembled in microbial fuel cells (MFCs) as anode, and the operation experiments showed that the N-CNS modification shortened start-up time, improved output stability and increased maximum output voltage significantly. The maximum power density of N-CNS-CC MFC was 1122.41 mW m<sup>−2</sup> which was 1.3 times of that of N-UA-CNS-CC MFC and 1.6 times of that of CC MFC. The results demonstrated that N-CNS was an ideal modification material for fabricating MFC anodes with simple preparation process and low cost.https://www.mdpi.com/2073-4344/10/4/381microbial fuel celldandelion seedscarbonizationchemical activationanode modification |
| spellingShingle | Xiaoye Xing Zhongliang Liu Wenwen Chen Xiaoge Lou Yanxia Li Qiang Liao Self-Nitrogen-Doped Carbon Nanosheets Modification of Anodes for Improving Microbial Fuel Cells’ Performance Catalysts microbial fuel cell dandelion seeds carbonization chemical activation anode modification |
| title | Self-Nitrogen-Doped Carbon Nanosheets Modification of Anodes for Improving Microbial Fuel Cells’ Performance |
| title_full | Self-Nitrogen-Doped Carbon Nanosheets Modification of Anodes for Improving Microbial Fuel Cells’ Performance |
| title_fullStr | Self-Nitrogen-Doped Carbon Nanosheets Modification of Anodes for Improving Microbial Fuel Cells’ Performance |
| title_full_unstemmed | Self-Nitrogen-Doped Carbon Nanosheets Modification of Anodes for Improving Microbial Fuel Cells’ Performance |
| title_short | Self-Nitrogen-Doped Carbon Nanosheets Modification of Anodes for Improving Microbial Fuel Cells’ Performance |
| title_sort | self nitrogen doped carbon nanosheets modification of anodes for improving microbial fuel cells performance |
| topic | microbial fuel cell dandelion seeds carbonization chemical activation anode modification |
| url | https://www.mdpi.com/2073-4344/10/4/381 |
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