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This MFC study Abstract Hydrophobicity of carbon‐based anodes hinders bacterial adhesion and biofilm formation. Herein, MnO 2 @MXene coated carbon cloth (CC) was designed as an anode for microbial fuel cells (MFCs).

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Coulombic efficiency87.6%

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What they did

System
MFC

What worked

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Abstract

Abstract Hydrophobicity of carbon‐based anodes hinders bacterial adhesion and biofilm formation. Herein, MnO 2 @MXene coated carbon cloth (CC) was designed as an anode for microbial fuel cells (MFCs). The anode integrated the hydrophilicity and conductivity of MXene with the biocompatibility of MnO 2 . This unique structure promoted bacterial colonisation and biofilm formation on the anode surface. MnO 2 @MXene enhanced electricity generation performance and wastewater degradation efficiency owing to the synergistic effect of MXene and MnO 2 . The MFC achieved a short startup time and an effective extracellular electron transfer process. The MnO 2 @MXene/CC anode ensured a higher power density and efficient decolourisation in MFCs. The MFC device achieved a high maximum power density of 746.3 mW/m 2 and a Congo red decolourisation efficiency of 87.6 % at 48 h. This work offers a potential strategy for the effective degradation of wastewater and recovery of electrical energy.

Key findings

  • MnO₂@MXene enhanced electricity generation performance and wastewater degradation efficiency owing to the synergistic effect of MXene and MnO₂.
  • The MFC achieved a short startup time and an effective extracellular electron transfer process.
  • The MFC device achieved a high maximum power density of 746.
  • 3 mW/m² and a Congo red decolourisation efficiency of 87.
  • 6 % at 48 h.

Keywords

Microbial fuel cellAnodeChemical engineeringCarbon fibersDegradation (telecommunications)Power density

Identifiers

DOI
10.1002/slct.202200612
Journal
ChemistrySelect
Year
2022