Electrophoretic deposition of carbon nanotube on reticulated vitreous carbon for hexavalent chromium removal in a biocathode microbial fuel cell

Fei, Kangqing; Song, Tian‐shun; Wang, Haoqi; Zhang, Dalu; Tao, Ran; Xie, Jingjing

doi:10.1098/rsos.170798

Cited by 17 publications

(3 citation statements)

References 38 publications

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“…The removal rate of Cu(II) in the sediment attained 57%, which was 1.7 times higher than that of the non-biocathode MFC. Fei et al (2017) constructed a three-dimensional biocathode by loading carbon nanotubes (RVC-CNT) on reticulated glassy carbon. They found that RVC-CNT significantly promoted the electrical conductivity and electron-transfer rate of the biocathode, providing more reaction sites for the reduction of Cr(VI).…”

Section: Key Factors Affecting the Removal Of Heavy Metals Using Bioc...mentioning

confidence: 99%

Research progress on using biological cathodes in microbial fuel cells for the treatment of wastewater containing heavy metals

Wang,

Zhai,

Long

et al. 2023

Front. Microbiol.

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Various types of electroactive microorganisms can be enriched to form biocathodes that reduce charge-transfer resistance, thereby accelerating electron transfer to heavy metal ions with high redox potentials in microbial fuel cells. Microorganisms acting as biocatalysts on a biocathode can reduce the energy required for heavy metal reduction, thereby enabling the biocathode to achieve a lower reduction onset potential. Thus, when such heavy metals replace oxygen as the electron acceptor, the valence state and morphology of the heavy metals change under the reduction effect of the biocathode, realizing the high-efficiency treatment of heavy metal wastewater. This study reviews the mechanisms, primary influencing factors (e.g., electrode material, initial concentration of heavy metals, pH, and electrode potential), and characteristics of the microbial community of biocathodes and discusses the electron distribution and competition between microbial electrodes and heavy metals (electron acceptors) in biocathodes. Biocathodes reduce the electrochemical overpotential in heavy metal reduction, permitting more electrons to be used. Our study will advance the scientific understanding of the electron transport mechanism of biocathodes and provide theoretical support for the use of biocathodes to purify heavy metal wastewater.

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Section: Key Factors Affecting the Removal Of Heavy Metals Using Bioc...mentioning

confidence: 99%

Research progress on using biological cathodes in microbial fuel cells for the treatment of wastewater containing heavy metals

Wang,

Zhai,

Long

et al. 2023

Front. Microbiol.

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“…For example, monolithic three-dimensional (3D) electrodes with porous structures have increased the effective electroactive surface area (EASA) for microbial loading. [13][14][15] Despite some recent success in improving the biocurrent density extracted from cells using this approach, clogging of the electrode remains a concern for long-term applications. [16,17] Other methods for developing 3D electrodes have relied on the design of electrodes with shape-adaptability.…”

Section: Introductionmentioning

confidence: 99%

Conjugated Polyelectrolyte/Bacteria Living Composites in Carbon Paper for Biocurrent Generation

Vázquez

McCuskey

Quek

et al. 2022

Macromol. Rapid Commun.

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Successful practical implementation of bioelectrochemical systems (BES)requires developing affordable electrode structures that promote efficient electrical communication with microbes. Recent efforts have centered on immobilizing bacteria with organic semiconducting polymers on electrodes via electrochemical methods. This approach creates a fixed biocomposite that takes advantage of the increased electrode's electroactive surface area (EASA). Here, it is demonstrated that a biocomposite comprising the water-soluble conjugated polyelectrolyte CPE-K and electrogenic Shewanella oneidensis MR-1 can self-assemble with carbon paper electrodes, thereby increasing its biocurrent extraction by ≈6-fold over control biofilms. A ≈1.5-fold increment in biocurrent extraction is obtained for the biocomposite on carbon paper relative to the biocurrent extracted from gold-coated counterparts. Electrochemical characterization revealed that the biocomposite stabilized with the carbon paper more quickly than atop flat gold electrodes. Cross-sectional images show that the biocomposite infiltrates inhomogeneously into the porous carbon structure. Despite an incomplete penetration, the biocomposite can take advantage of the large EASA of the electrode via long-range electron transport. These results show that previous success on gold electrode platforms can be improved when using more commercially viable and easily manipulated electrode materials.

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“…In this study, Al films were arranged on Al alloy and prepared along with stainless steel substrates using a combination of HCl/H 2 O 2 etching and electrophoretic deposition (EPD) [31].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Superhydrophobic Multiscale Films for Oil-Water Separation in a Harsh Environment

Fan

Chen

et al. 2019

Advances in Materials Science and Engineering

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The problem of oil-water separation regarding oil-containing brine has been of much concern when using the oil pad water dissolution method to construct salt cavern reservoirs. In this paper, oil-water separation materials with micro-nano hierarchical structure were prepared on different metal substrates using chemical etching and electrophoretic deposition. And hydrophobic materials with a single micro/nano structure were also prepared; then, the surfaces were hydrophobized by various low surface energy modifiers. Thereafter, we analyzed and compared the surface morphology, chemical composition, and wettability of all the materials and found that brine contact angles on hierarchical structure surfaces were above 160° while the diesel was completely diffused. Furthermore, preparation parameters affecting the surface morphology and wettability of micro-nano composite structures were explored. Meanwhile, it was found that the surface of prepared composite structure could still maintain super-hydrophobic/lipophilic properties after exposure in air for 6 months, sliding 60 cm on sandpaper, or immersion in diesel/brine for 48 h. Moreover, the composite structure surface displayed improved corrosion resistance with corrected self-corrosion potential and lower corrosion current density. It was equally observed that the studied materials could be better adapted to the actual context of salt cavern reservoir construction and thus have great application prospects.

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Electrophoretic deposition of carbon nanotube on reticulated vitreous carbon for hexavalent chromium removal in a biocathode microbial fuel cell

Cited by 17 publications

References 38 publications

Research progress on using biological cathodes in microbial fuel cells for the treatment of wastewater containing heavy metals

Research progress on using biological cathodes in microbial fuel cells for the treatment of wastewater containing heavy metals

Conjugated Polyelectrolyte/Bacteria Living Composites in Carbon Paper for Biocurrent Generation

Preparation of Superhydrophobic Multiscale Films for Oil-Water Separation in a Harsh Environment

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