Improved electrode performance in microbial fuel cells and the enhanced visible light-induced photoelectrochemical behaviour of PtO @M-TiO2 nanocomposites

Ansari, Sajid Ali; Khan, Mohammad Mansoob; Ansari, Mohd Omaish; Cho, Moo Hwan

doi:10.1016/j.ceramint.2015.03.321

Cited by 44 publications

(24 citation statements)

References 39 publications

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“…Recent efforts directed towards the enhancement of the MFC performance have led to a strategy of the coupling of MFCs with a photocurrent‐generating entity/device, which includes photosynthetic microorganisms hybridized with electrogenic cultures, the development of a microbial photo‐electrochemical solar cell device based on a bioanode and copper oxide photocathodes, a visible‐light‐active PtO x ‐TiO 2 composite photocathode, the coupling of a solar water‐splitting device with microbial electrohydrogenesis, a microbial photo‐electrochemical system that uses a TiO 2 (P25) photocathode under UV light, a dual‐chamber microbial fuel cell with a CuInS 2 photocathode, and the utilization of photosynthetic biocatalysts . These approaches demonstrate various strategies to improve the MFC performance by reducing the overpotential of the required oxygen reduction reaction (ORR) at the cathode surface.…”

Section: Introductionmentioning

confidence: 99%

Photocoupled Bioanode: A New Approach for Improved Microbial Fuel Cell Performance

et al. 2017

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Microbial fuel cells (MFCs) received considerable attention because of their ability to provide dual advantages of electricity generation and wastewater treatment. However, their performance is primarily limited by the slow oxygen reduction reaction (ORR). To alleviate this problem, we describe a hybrid MFC in which a conventional bioanode is coupled with a TiO2 photoanode. The photocatalytic photoanode utilizes light to provide additional photogenerated electrons to the external circuit of the MFC, which promotes the ORR, as confirmed by power density curves and electrochemical impedance spectra, resulting in improved power generation (1284±20 mW m−2) compared to that of a normal MFC (850±12 mW m−2). Furthermore, the ability of the TiO2 photoanode to reduce CO2 to methane is demonstrated.

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Section: Introductionmentioning

confidence: 99%

Photocoupled Bioanode: A New Approach for Improved Microbial Fuel Cell Performance

et al. 2017

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“…The design and development of heterostructured photocatalysts, which are active and cover the maximum part of the solar energy spectrum, have attracted considerable research attention in current years1234. Therefore, there have been many studies on semiconductor photocatalysts, in particular TiO 2 , for the visible light photocatalytic applications.…”

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confidence: 99%

“…Therefore, there have been many studies on semiconductor photocatalysts, in particular TiO 2 , for the visible light photocatalytic applications. However, TiO 2 has a wide band gap (~3.2 eV), meaning that it cannot utilize the major part of the solar spectrum, and high photoinduced electron–hole (e − /h + ) recombination rate123456. Therefore, recent research has focused on developing highly visible light active photocatalysts, which is an alternative to TiO 2 12345678.…”

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confidence: 99%

Facile and Scale Up Synthesis of Red Phosphorus-Graphitic Carbon Nitride Heterostructures for Energy and Environment Applications

Ansari

Cho

2016

Sci Rep

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The development of heterostructured materials for efficient solar energy conversion and energy storage devices are essential for practical applications. In this study, a simple and relatively inexpensive method was used to improve the visible light-driven photocatalytic activity and electrochemical supercapacitor behavior of the graphitic carbon nitride (g-C3N4) by elemental red phosphorus (RPh). The as-prepared RPh-g-C3N4 was characterized in detail using a range of spectroscopic techniques to understand the structure, morphology, chemical interaction, and chemical state of the materials. The visible light-driven photocatalytic activity and supercapacitive electrode performance were assessed by the photodegradation of model colored, non-colored organic pollutants, and electrochemical half-cell measurements, respectively. The RPh-g-C3N4 heterostructure with 30 weight percent of RPh exhibited remarkably high photocatalytic activity for the degradation of pollutants compared to the bare constituent materials, which was further confirmed by the photoelectrochemical study under similar visible photoirradiation conditions. The RPh-g-C3N4 heterostructure supercapacitor electrode displayed a high capacitance of 465 F/g and excellent cyclic stability with capacitance retention of 90% after 1000 cycles at a current of 10 A/g. The superior performance was attributed mainly to the narrow band gap, high surface area, capacitive nature of RPh, and nitrogen-rich skeleton of g-C3N4.

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“…Microbial fuel cells (MFCs) are one of the most promising types of fuel cells, used for simultaneous wastewater treatment and energy harvesting [23][24][25]. Due to this, this technique is considered as an environmentally friendly technology [26,27]. In the anode side of an MFC, the microorganism metabolite and organic materials contained in the wastewater (or other waste) produce electrons and protons [28,29].…”

Section: Introductionmentioning

confidence: 99%

A Carbon-Cloth Anode Electroplated with Iron Nanostructure for Microbial Fuel Cell Operated with Real Wastewater

et al. 2020

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Microbial fuel cell (MFC) is an emerging method for extracting energy from wastewater. The power generated from such systems is low due to the sluggish electron transfer from the inside of the biocatalyst to the anode surface. One strategy for enhancing the electron transfer rate is anode modification. In this study, iron nanostructure was synthesized on a carbon cloth (CC) via a simple electroplating technique, and later investigated as a bio-anode in an MFC operated with real wastewater. The performance of an MFC with a nano-layer of iron was compared to that using bare CC. The results demonstrated that the open-circuit voltage increased from 600 mV in the case of bare CC to 800 mV in the case of the iron modified CC, showing a 33% increase in OCV. This increase in OCV can be credited to the decrease in the anode potential from 0.16 V vs. Ag/AgCl in the case of bare CC, to −0.01 V vs. Ag/AgCl in the case of the modified CC. The power output in the case of the modified electrode was 80 mW/m2—two times that of the MFC using the bare CC. Furthermore, the steady-state current in the case of the iron modified carbon cloth was two times that of the bare CC electrode. The improved performance was correlated to the enhanced electron transfer between the microorganisms and the iron-plated surface, along with the increase of the anode surface- as confirmed from the electrochemical impedance spectroscopy and the surface morphology, respectively.

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Improved electrode performance in microbial fuel cells and the enhanced visible light-induced photoelectrochemical behaviour of PtO @M-TiO2 nanocomposites

Cited by 44 publications

References 39 publications

Photocoupled Bioanode: A New Approach for Improved Microbial Fuel Cell Performance

Photocoupled Bioanode: A New Approach for Improved Microbial Fuel Cell Performance

Facile and Scale Up Synthesis of Red Phosphorus-Graphitic Carbon Nitride Heterostructures for Energy and Environment Applications

A Carbon-Cloth Anode Electroplated with Iron Nanostructure for Microbial Fuel Cell Operated with Real Wastewater

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