A layer-by-layer self-assembled Fe2O3 nanorod-based composite multilayer film on ITO anode in microbial fuel cell

Microbial fuel cells (MFCs) are bio-electrochemical devices which can generate electricity by electrochemical reactions using microorganisms as biocatalysts. In order to improve the energy output in MFC system, α-Fe2O3 nanorod and chitosan (CS) based on layer-by-layer (LBL) self-assembled technique were used to modify the ITO as the anode. This modification strategy ensured a relatively high content of Fe2O3 nanorod within the polymer matrix according to results. The MFC with modified anode produced a higher quantity of electricity output with 320% enhancement comparing with the bare anode, and the MFC with the (Fe2O3/CS)4/ITO anode could produce the highest current comparing with other modified anode. The Fe2O3 nanorod-based LBL modified electrode is promising for the development of the MFC.

Graphical abstractA microbial fuel cell (MFC) is a promising new technology, but the MFC delivers much lower power output when compared to the well-developed chemical fuel cell (CFC). In this paper, α-Fe2O3 nanorods and chitosan based on layer-by-layer assemble technique were used to modify the ITO as the anode in MFC system. The MFC with the modified anode produces a higher quantity of electric charge output with 320% enhancement comparing to the bare anode.Figure optionsDownload full-size imageDownload as PowerPoint slide