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MFC research paper focusing on carbon nanotube, power density, cathode

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What they did

System
MFC
Substrate
pure compound

What worked

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Abstract

For Cr(VI)-removal microbial fuel cell (MFC), a more efficient biocathode in MFCs is required to improve the Cr(VI) removal and electricity generation. RVC-CNT electrode was prepared through the electrophoretic deposition of carbon nanotube (CNT) on reticulated vitreous carbon (RVC). The power density of MFC with an RVC-CNT electrode increased to 132.1 ± 2.8 mW m⁻², and 80.9% removal of Cr(VI) was achieved within 48 h; compared to only 44.5% removal of Cr(VI) in unmodified RVC. Cyclic voltammetry, energy-dispersive spectrometry and X-ray photoelectron spectrometry showed that the RVC-CNT electrode enhanced the electrical conductivity and the electron transfer rate; and provided more reaction sites for Cr(VI) reduction. This approach provides process simplicity and a thickness control method for fabricating three-dimensional biocathodes to improve the performance of MFCs for Cr(VI) removal.

Keywords

Microbial fuel cellElectrophoretic depositionHexavalent chromiumCarbon nanotubeCarbon fibersCyclic voltammetry

Identifiers

DOI
10.1098/rsos.170798
Journal
Royal Society Open Science
Year
2017