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<p>Microbial fuel cells (MFCs) are promising bioelectrochemical systems that utilize microorganisms to simultaneously remediate contaminated environments and generate electrical energy. To further enhance their electricity generation performance, amino-functionalized, hydroxyl-functionalized, and carboxyl-functionalized multi-walled carbon nanotubes (MWCNTs) were used to modify the anode, and their characterization and electricity generation performance were tested. Field emission scanning electron microscopy revealed the formation of micro-scale particles (ranging from 3 to 10&#xa0;μm) on the modified anodes, which increased surface roughness. Thermogravimetric analysis demonstrated enhanced thermal stability, with the modified carbon felts exhibiting lower weight loss (approximately 4%) compared to unmodified carbon felt (~ 8%) at 800℃. Contact angle tests confirmed highly hydrophilic surfaces (&lt; 10°). Furthermore, Fourier Transform Infrared Spectroscopy (FTIR) analysis confirmed the successful modification by revealing the distinct presence of amino, hydroxyl, and carboxyl functional groups on the respective modified anodes. Four groups of aviation fuel-contaminated soil MFCs were constructed using carbon felt (CF) and the three types of modified anodes as electrodes. Similarly, the maximum closed-circuit output voltage reached 529.15&#xa0;mV for the NH<sub>2</sub>-MWCNTs anode, which was significantly higher than that of the unmodified CF 474.5&#xa0;mV, and the removal rates of aviation fuel were also higher than CF (16.5%). It can be seen that MWCNTs-modified anodes can improve the electricity generation performance of MFCs for aviation fuel-contaminated soil.</p>

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Effect of MWCNTs-Modified Anode on the Performance of SMFCs Contaminated Aviation Fuel Soil

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • Jinmei Bai,
  • Yulei Song,
  • Junbo Yao,
  • Yuan Li,
  • Haiying Guo,
  • Xiangji Dou

摘要

Microbial fuel cells (MFCs) are promising bioelectrochemical systems that utilize microorganisms to simultaneously remediate contaminated environments and generate electrical energy. To further enhance their electricity generation performance, amino-functionalized, hydroxyl-functionalized, and carboxyl-functionalized multi-walled carbon nanotubes (MWCNTs) were used to modify the anode, and their characterization and electricity generation performance were tested. Field emission scanning electron microscopy revealed the formation of micro-scale particles (ranging from 3 to 10 μm) on the modified anodes, which increased surface roughness. Thermogravimetric analysis demonstrated enhanced thermal stability, with the modified carbon felts exhibiting lower weight loss (approximately 4%) compared to unmodified carbon felt (~ 8%) at 800℃. Contact angle tests confirmed highly hydrophilic surfaces (< 10°). Furthermore, Fourier Transform Infrared Spectroscopy (FTIR) analysis confirmed the successful modification by revealing the distinct presence of amino, hydroxyl, and carboxyl functional groups on the respective modified anodes. Four groups of aviation fuel-contaminated soil MFCs were constructed using carbon felt (CF) and the three types of modified anodes as electrodes. Similarly, the maximum closed-circuit output voltage reached 529.15 mV for the NH2-MWCNTs anode, which was significantly higher than that of the unmodified CF 474.5 mV, and the removal rates of aviation fuel were also higher than CF (16.5%). It can be seen that MWCNTs-modified anodes can improve the electricity generation performance of MFCs for aviation fuel-contaminated soil.