Bioelectrochemical systems: Sustainable bio-energy powerhouses

Gul, Mahwash Mahar; Ahmad, Khuram Shahzad

doi:10.1016/j.bios.2019.111576

Cited by 114 publications

(55 citation statements)

References 228 publications

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“…This is strongly attributed to the fact that in the current study pathways for electron transport were not only provided by Zn, and Ni but also the organic stabilizing agent (C 4 H 8 O and C 8 H 19 N) of ZnO@NiO as indicated by XPS (Figure and MS spectra (Figure B). Gul and Ahmad described the involvement of organic compounds for electron flow and current generation by following equations for anode and cathode, respectively:

Organic compounds + H_{2} normalO \to {CO}_{2} + normalH + + e^{-}

O^{2} + 4 normalH + + 4 e^{-} \to 2 H_{2} normalO

…”

Section: Resultssupporting

confidence: 55%

Effect of NiO on organic framework functionalized ZnO nanoparticles for energy storage application

et al. 2020

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Functionalization of metal oxides nanomaterial by different organic and inorganic species could considerably enhance the electrochemical performance of a supercapacitor. Here, we have synthesized and functionalized ZnO nanoparticles (NPs) via organic compounds of E. cognate and then doped the synthesized nanomaterials by NiO following hydrothermal route involving the bioactive compounds. As synthesized ZnO@NiO was analyzed by field emission-scanning electron microscopy at nanoscale. The organic functional groups were delineated by X-ray photoelectron spectroscopy as well as by Fourier transform infrared spectroscopy. What is more, Tauc plot revealed drastically decreased band gap energy of ZnO@NiO to 2.48 eV resulting in an enhanced electrochemical properties. Therefore, organic framework derived ZnO@NiO nanomaterial was scrutinized as an electrode for supercapacitor by galvanostatic charge-discharge, cyclicvoltammetry and electrochemical impedance spectroscopy. ZnO@NiO electrode demonstrated specific capacitance of 185 Fg −1 by cyclicvoltammetry, proposing its potential towards supercapacitor due to nanoscale particles and incorporated C, O, and N atoms of organic compounds. K E Y W O R D Sbio-template, low band gap energy, nanostructures, stabilizing agents, supercapacitor, zinc oxides: nickel oxide

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Organic compounds + H_{2} normalO \to {CO}_{2} + normalH + + e^{-}

O^{2} + 4 normalH + + 4 e^{-} \to 2 H_{2} normalO

…”

Section: Resultssupporting

confidence: 55%

Effect of NiO on organic framework functionalized ZnO nanoparticles for energy storage application

et al. 2020

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“…Therefore, BES is a promising technology for managing water pollution and global energy crisis [65]. Basic microbial fuel cells (MFC), photosynthetic MFC, plant MFC and biophotovoltaics [66] are examples of several forms of BES. Due to the simple operation and mild conditions, MFC nowadays attracts great interest from researchers worldwide as a new source of renewable bioenergy of the future.…”

Section: Bioelectrochemical System (Bes)mentioning

confidence: 99%

“…Figure 2 demonstrates the advantages and disadvantages of MFC. The anodic chamber of MFC is made up of an anode, microbes (bacteria) and a substrate (wastewater) [66]. Being the most significant component of MFC, anode with the microbes attached to it allows the electrons flow via the electrochemical reactions of the microbes through the degradation of substrates.…”

Section: Modification Of Mfc Components With Nanomaterialsmentioning

confidence: 99%

“…Being the most significant component of MFC, anode with the microbes attached to it allows the electrons flow via the electrochemical reactions of the microbes through the degradation of substrates. An essential aspect of the anode is the ability of the microbes to facilitate the formation of biofilms and increase the probability of EET to occur [66]. The most common materials used in the fabrication of anode are graphite or carbon that comes in various sizes or geometrics, for instance, carbon nanotubes, rods, felt, cloth, paper and plates [66,[77][78][79][80][81].…”

Section: Modification Of Mfc Components With Nanomaterialsmentioning

confidence: 99%

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Nanomaterials Utilization in Biomass for Biofuel and Bioenergy Production

et al. 2020

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The world energy production trumped by the exhaustive utilization of fossil fuels has highlighted the importance of searching for an alternative energy source that exhibits great potential. Ongoing efforts are being implemented to resolve the challenges regarding the preliminary processes before conversion to bioenergy such as pretreatment, enzymatic hydrolysis and cultivation of biomass. Nanotechnology has the ability to overcome the challenges associated with these biomass sources through their distinctive active sites for various reactions and processes. In this review, the potential of nanotechnology incorporated into these biomasses as an aid or addictive to enhance the efficiency of bioenergy generation has been reviewed. The fundamentals of nanomaterials along with their various bioenergy applications were discussed in-depth. Moreover, the optimization and enhancement of bioenergy production from lignocellulose, microalgae and wastewater using nanomaterials are comprehensively evaluated. The distinctive features of these nanomaterials contributing to better performance of biofuels, biodiesel, enzymes and microbial fuel cells are also critically reviewed. Subsequently, future trends and research needs are highlighted based on the current literature.

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“…The flow of electrons can transfer both energy and information between living and non-living systems for bioelectronic and biosensing applications. Extracellular electron transfer (EET) pathways (Shi et al, 2016) can electrically connect living microorganisms with electrochemical cells, enabling applications such as power generation in microbial fuel cells (MFCs) (Gul and Ahmad, 2019; Logan, 2009; Santoro et al, 2017; Slate et al, 2019) and environmental sensing in bioelectronic sensing systems (Chouler et al, 2018; Wang et al, 2013; Zhou et al, 2017). Engineering EET in native electroactive microorganisms, such as Shewanella oneidensis MR-1 (Cheng et al, 2020; Min et al, 2017; West et al, 2017), and non-native hosts, such as Escherichia coli (Jensen et al, 2016; Sturm-Richter et al, 2015), has expanded the range of potential applications (Harris et al, 2017; Su and Ajo-Franklin, 2019).…”

Section: Introductionmentioning

confidence: 99%

A hybrid cytcmaturation system enhances the bioelectrical performance of engineeredEscherichia coliby improving the rate-limiting step

Fukushima

Ajo‐Franklin

2020

Preprint

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18Bioelectronic devices can use electron flux to enable communication between biotic components 19 and abiotic electrodes. We have modified Escherichia coli to electrically interact with electrodes 20 by expressing the cytochrome c from Shewanella oneidensis MR-1. However, we observe 21 inefficient electrical performance, which we hypothesize is due to the limited compatibility of the 22 E. coli cytochrome c maturation (ccm) systems with MR-1 cyt c. Here we test whether the 23 bioelectronic performance of E. coli can be improved by constructing hybrid ccm systems with 24 parts from both E. coli and S. oneidensis MR-1. Our results show that the hybrid CcmH can 25 increase cytochrome c expression and the stoichiometry of protein components also shifted. 26 Electrochemical measurements show that the electron flux per cell increased 48% with the hybrid 27 system. Additionally, the electrical response doubled with addition of exogenous flavin, which 28 gives us a quantitative understanding of the bottleneck step in this electron conduit. These results 29 demonstrate that this hybrid ccm system can enhance the bioelectrical performance of the cyt c 30 expressing Escherichia coli, allowing to build more efficient bioelectronic devices. 31 32 KEYWORDS 33 Microbial electrochemistry, microbial fuel cell, bioelectronic sensor, synthetic biology, 34 cytochrome c maturation 35 36

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Bioelectrochemical systems: Sustainable bio-energy powerhouses

Cited by 114 publications

References 228 publications

Effect of NiO on organic framework functionalized ZnO nanoparticles for energy storage application

Effect of NiO on organic framework functionalized ZnO nanoparticles for energy storage application

Nanomaterials Utilization in Biomass for Biofuel and Bioenergy Production

A hybrid cytcmaturation system enhances the bioelectrical performance of engineeredEscherichia coliby improving the rate-limiting step

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