In-situ growth of graphene/polyaniline for synergistic improvement of extracellular electron transfer in bioelectrochemical systems

Sun, De-Zhen; Yu, Yangyang; Xie, Rongrong; Zhang, Chun‐Lian; Yang, Yuan; Zhai, Dan‐Dan; Yang, Guodong; Liu, Lei; Yong, Yang‐Chun

doi:10.1016/j.bios.2016.08.037

Cited by 78 publications

(19 citation statements)

References 48 publications

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“…When compared with the untreated nickel foam, the graphene created a rougher surface on the modified nickel foam; for a biofilm, that might effectively improve the microorganisms' adherence . More importantly, the graphene modification could form multiplexed conductive pathways, thus facilitating electron transfer between microorganisms and electrode, while the electron transfer rate between bacteria can also be enhanced …”

Section: Resultsmentioning

confidence: 99%

“…28,31 More importantly, the graphene modification could form multiplexed conductive pathways, thus facilitating electron transfer between microorganisms and electrode, while the electron transfer rate between bacteria can also be enhanced. 28,31,34,40,41 Further, at the end of the experiment, the microbial community of inoculum, biofilm and planktonic cells, in the MES with G-NF, were analyzed. Alpha diversity results showed that community richness reached saturation level, with coverages higher than 99% (Table S2).…”

Section: Bioelectrocatalytic Activitymentioning

confidence: 99%

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High efficiency microbial electrosynthesis of acetate from carbon dioxide using a novel graphene–nickel foam as cathode

Song

Fei

Zhang

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND Microbial electrosynthesis (MES) is a biocathode‐driven process, producing high‐value chemicals, from CO2. However, the low efficiency of the biocathode hinders the MES process efficiency significantly. RESULTS A novel 3D graphene–nickel foam (G‐NF) cathode has been fabricated, by hydrothermal approach for the improvement of microbially‐catalyzed reduction at the MES cathode. An increase of 1.8 times in the volumetric acetate production rate was obtained, compared with the untreated nickel foam. In MES with G‐NF, a volumetric acetate production rate of 3.11 mmol L‐1 day‐1 has been achieved; 70% of the electrons consumed were recovered and the final acetate concentration reached 5.46 g L‐1 within 28 days. CONCLUSION The hierarchical porous G‐NF cathode improved bacterial colonization and the efficiency of mass, nutrients and protons transfer due to its 3D composition; the graphene coating considerably increased the effective surface area for microbial adhesion, as well as the electron transfer rate of biofilm in the MES. This study attempted to improve the efficiency of the biocathode, and provides a promising large electrode for large‐scale MES devices. © 2017 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Bioelectrocatalytic Activitymentioning

confidence: 99%

High efficiency microbial electrosynthesis of acetate from carbon dioxide using a novel graphene–nickel foam as cathode

Song

Fei

Zhang

et al. 2017

J of Chemical Tech & Biotech

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“…Furthermore, when aniline monomer was employed into the electrolysis system, a graphene/PANI composite structure was formed on the graphite paper electrode, and maximum power density of corresponding MFC was 4.44 W/m 2 . The graphene layer structure on electrode surface enables macroporous structure formation and partially explains the high performance achieved [ 81 ].…”

Section: Building 3d Electrodes For High-performance Besmentioning

confidence: 99%

“… ( a ) Schematic of porous 3D CNT sponge fabrication by CVD [ 59 ]; ( b ) Schematic of biofilm attachment in CNT matrix with long and loose structure [ 78 ]; ( c , d ) SEM images of vertically aligned, forest like MWCNT deposited on silica wafer chamber via CVD [ 77 ]; ( e ) SEM image of porous MnO 2 3D frame in-situ growth on carbon paper via electrochemical reduction [ 79 ]; ( f , g ) Schematic and SEM image of in-situ fabricated graphene/PANI composite electrode on graphite paper surface [ 81 ]. Reproduced with permission from Elsevier, American Chemical Society and Wiley.…”

Section: Figurementioning

confidence: 99%

Three-Dimensional Electrodes for High-Performance Bioelectrochemical Systems

Zhai

et al. 2017

IJMS

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Bioelectrochemical systems (BES) are groups of bioelectrochemical technologies and platforms that could facilitate versatile environmental and biological applications. The performance of BES is mainly determined by the key process of electron transfer at the bacteria and electrode interface, which is known as extracellular electron transfer (EET). Thus, developing novel electrodes to encourage bacteria attachment and enhance EET efficiency is of great significance. Recently, three-dimensional (3D) electrodes, which provide large specific area for bacteria attachment and macroporous structures for substrate diffusion, have emerged as a promising electrode for high-performance BES. Herein, a comprehensive review of versatile methodology developed for 3D electrode fabrication is presented. This review article is organized based on the categorization of 3D electrode fabrication strategy and BES performance comparison. In particular, the advantages and shortcomings of these 3D electrodes are presented and their future development is discussed.

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“…Electrochemically active microorganisms (EAMs) are species that can transport electrons outward from cells to extracellular electron acceptors or/and inward from extracellular electron donors into cells ( Logan and Rabaey, 2012 ; Yong et al, 2014 ; Jafary et al, 2015 ; Si et al, 2015 ). The electrochemical activity of EAMs determines the electron transfer efficiency between electrodes and bacteria ( Liao et al, 2015 ; Sun et al, 2017 ). Thus, EAMs are of vital importance to the performance of MFCs during both electricity generation and contaminant treatment ( Lovley, 2012 ).…”

Section: Introductionmentioning

confidence: 99%

A Facultative Electroactive Chromium(VI)-Reducing Bacterium Aerobically Isolated From a Biocathode Microbial Fuel Cell

Ren

Owens

et al. 2018

Front. Microbiol.

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A facultative electroactive bacterium, designated strain H, was aerobically isolated from the biocathode of a hexavalent chromium (Cr(VI))-reducing microbial fuel cell (MFC). Strain H is Gram-positive and rod shaped (1–3 μm length). 16S rRNA gene analysis suggested that this strain (accession number MH782060) belongs to the genus Bacillus and shows maximum similarity to Bacillus cereus whose electrochemical activity has never previously been reported. Moreover, this strain showed efficient Cr(VI)-reducing ability in both heterotrophic (aerobic LB broth) and autotrophic (anaerobic MFC cathode) environments. Cr(VI) removal reached 50.6 ± 1.8% after 20 h in LB broth supplemented with Cr(VI) (40 mg/L). The strain H biocathode significantly improved the performance of the Cr(VI)-reducing MFC, achieving a maximum power density of 31.80 ± 1.06 mW/m2 and Cr(VI) removal rate of 2.56 ± 0.10 mg/L–h, which were 1.26 and 1.75 times higher than those of the MFC with the sterile control cathode, respectively. This study offers a novel Gram-positive Bacillus sp. strain for Cr(VI) removal in MFCs, and shows a facile aerobic isolation method could be used to screen facultative electroactive bacteria.

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In-situ growth of graphene/polyaniline for synergistic improvement of extracellular electron transfer in bioelectrochemical systems

Cited by 78 publications

References 48 publications

High efficiency microbial electrosynthesis of acetate from carbon dioxide using a novel graphene–nickel foam as cathode

High efficiency microbial electrosynthesis of acetate from carbon dioxide using a novel graphene–nickel foam as cathode

Three-Dimensional Electrodes for High-Performance Bioelectrochemical Systems

A Facultative Electroactive Chromium(VI)-Reducing Bacterium Aerobically Isolated From a Biocathode Microbial Fuel Cell

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