Synergistic effect of titanium dioxide nanocrystal/reduced graphene oxide hybrid on enhancement of microbial electrocatalysis

Zou, Long; Qiao, Yan; Wu, Xiaoshuai; Ma, Caixia; Li, Xin; Li, Chang Ming

doi:10.1016/j.jpowsour.2014.11.127

Cited by 81 publications

(29 citation statements)

References 33 publications

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“…The power density obtained by modified anodes prepared using NWG composites coated on CC was much higher than the power density obtained from other modified anodes prepared using rGO and NiWO 4 particles only as a coating material on CC, these results indicate the synergistic effect between rGO and NiWO 4 , which clearly reflects from the power and current density data (Figure ). The improvement in MFC performance has been reported by various other researchers also due to combined effect between GO and different metal oxides (MnO 2 , Fe 3 O 4, SnO 2, TiO 2 ) and polymers (polyaniline, polypyrrole) , , , . Similar kind of synergistic enhancement has also been observed in this SMFC study.…”

Section: Resultssupporting

confidence: 88%

“…While electro‐catalysts, on electrode surface catalyzes the undergoing electrochemical reactions and increases the redox reaction rate. Redox active electro‐capacitive metal oxides/hydroxides along with high surface area and electro‐catalytic active graphene oxide (GO) offer a platform for efficient extracellular electron transfer and capacitive bio‐anode formation . Implementation of capacitive material in the anode can accumulate the charge like an internal capacitor and discharge over a short period to power a device.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Performance of a Single Chamber Microbial Fuel Cell Using NiWO₄/Reduced Graphene Oxide Coated Carbon Cloth Anode

2019

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Microbial fuel cell (MFC) technology has potential to generate bioelectricity. However, the low power density problem is considerably associated with anode materials and its performance. In this study, modified anodes for single chamber MFC (SMFC) have been developed using NiWO4 impregnated on reduced graphene oxide (rGO) (NWG) composite. The analytical and morphological properties of rGO, NiWO4 particles and NWG composites have been characterized by FTIR, XRD, SEM and TEM. The electrochemical activity and capacitance of modified anode(s) are determined by cyclic voltammetry and galvanostatics charge‐discharge, respectively. Modified NWG composite (2 mmol)‐carbon cloth (CC) anode has highest capacitance value of 47.27 ± 0.18 F cm−2. The maximum power density obtained by modified NWG composite (2 mmol)‐CC anode was observed to be 1128 ± 42 mW m−2 which was 6.57 times higher than the unmodified anode (171 ± 8 mW m−2). Electrochemical impedance spectra results indicate a substantial improvement in electron transfer between the microbes and the modified NWG composites‐CC anodes. The decrease in the internal resistance of SMFC system is observed due to the improved electrochemical capacitance and synergistic effect between NiWO4 and rGO. In conclusion, modified NWG composites‐CC anodes enhance the performance considerably and show excellent potential in electrode surface electrocatalyst modifier in MFCs.

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Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Enhanced Performance of a Single Chamber Microbial Fuel Cell Using NiWO₄/Reduced Graphene Oxide Coated Carbon Cloth Anode

2019

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“…However, the amorphous TiO 2 was loosely deposited on the graphene surface resulting in poor catalytic utilization of TiO 2 . Zou et al [86] synthesized TiO 2 /rGO hybrid with uniformly deposited small sized TiO 2 crystals on rGO nanosheets through a sol-gel process (Fig. 6a), which exhibited a typical type IV hysteresis loop [87], suggesting a typical mesoporous structure (inset in Fig.…”

Section: Science China Materialsmentioning

confidence: 99%

“…Fig. 6d shows that the nanocrystal TiO 2 /rGO hybrid mentioned above coated on nickel foam (TiO 2 /rGO@NiF) can deliver a maximum power density of 3169 mW m −2 , which is 19-fold higher than that of carbon cloth anode [86]. Additionally, high consideration has also been given to SnO 2 because of its unique properties such as electrical conductivity, chemical sensitivity and low cost.…”

Section: Science China Materialsmentioning

confidence: 99%

Graphene-based electrode materials for microbial fuel cells

Cai

Wen

et al. 2015

Sci. China Mater.

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Microbial fuel cells (MFCs) are environmentally friendly technology capable of converting chemical energy stored in wastewaters directly into electrical energy by using microorganisms as biocatalysts. However, the overall low power density of the MFC and the high cost of its components are two major barriers for its commercialization. Among all the factors, the electrodes (cathode and anode) materials play the significant role in affecting the performance of MFCs. Recently, the performance of MFCs has been improved by using graphene-based electrodes that are more conductive and mechanically stable with larger surface area and higher electrocatalytic activity compared to the conventional carbon materials. This paper provides an overview of recent research progress in graphene-based materials as electrodes for MFCs, which will be the promising candidates for developing MFCs and other bioelectrochemical systems to achieve sustainable water/wastewater treatment and bioenergy production.

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“…Admittedly, though the external soluble RMs have excellent performance, they have the disadvantage of easy loss. Endogenous RMs [13,14] from microbes can solve the above-mentioned problem to a certain extent. "Nanowires", whether they are biotic or abiotic, also have the same effect [15e18].…”

Section: Introductionmentioning

confidence: 99%

A hermetic self-sustained microbial solar cell based on Chlorella vulgaris and a versatile charge transfer chain

Pan

Zhou

2015

Journal of Power Sources

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Synergistic effect of titanium dioxide nanocrystal/reduced graphene oxide hybrid on enhancement of microbial electrocatalysis

Cited by 81 publications

References 33 publications

Enhanced Performance of a Single Chamber Microbial Fuel Cell Using NiWO₄/Reduced Graphene Oxide Coated Carbon Cloth Anode

Enhanced Performance of a Single Chamber Microbial Fuel Cell Using NiWO₄/Reduced Graphene Oxide Coated Carbon Cloth Anode

Graphene-based electrode materials for microbial fuel cells

A hermetic self-sustained microbial solar cell based on Chlorella vulgaris and a versatile charge transfer chain

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Synergistic effect of titanium dioxide nanocrystal/reduced graphene oxide hybrid on enhancement of microbial electrocatalysis

Cited by 81 publications

References 33 publications

Enhanced Performance of a Single Chamber Microbial Fuel Cell Using NiWO4/Reduced Graphene Oxide Coated Carbon Cloth Anode

Enhanced Performance of a Single Chamber Microbial Fuel Cell Using NiWO4/Reduced Graphene Oxide Coated Carbon Cloth Anode

Graphene-based electrode materials for microbial fuel cells

A hermetic self-sustained microbial solar cell based on Chlorella vulgaris and a versatile charge transfer chain

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Product

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About

Enhanced Performance of a Single Chamber Microbial Fuel Cell Using NiWO₄/Reduced Graphene Oxide Coated Carbon Cloth Anode

Enhanced Performance of a Single Chamber Microbial Fuel Cell Using NiWO₄/Reduced Graphene Oxide Coated Carbon Cloth Anode