Enhancement of methyl orange degradation and power generation in a photoelectrocatalytic microbial fuel cell

Han, He-Xing; Shi, Chen; Li, Yuan

doi:10.1016/j.apenergy.2017.07.032

Cited by 76 publications

(25 citation statements)

References 30 publications

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“…metal removal/recovery [99][100][101][102]; and, simultaneous generation of electricity and hydrogen [12,[103][104][105].…”

Section: Semiconductor Materials Applied In Photoelectrocatalytic Wasmentioning

confidence: 99%

“…The semiconductor materials that are applied in photoelectrocatalytic treatment of wastewater include photoanodes (n-type) and photocathodes (p-type) if oxidation or reduction is the main process at the interface [84]. Thus, photoelectrocatalysis is developed in such wastewater treatment field as: organic compounds oxidation [92,93]; inorganic ions reduction [94,95]; disinfection [96][97][98]; metal removal/recovery [99][100][101][102]; and, simultaneous generation of electricity and hydrogen [12,[103][104][105].…”

Section: Single Semiconductor Photoelectrode Materialsmentioning

confidence: 99%

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Semiconductor Electrode Materials Applied in Photoelectrocatalytic Wastewater Treatment—an Overview

Kuśmierek

2020

Catalysts

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Industrial sources of environmental pollution generate huge amounts of industrial wastewater containing various recalcitrant organic and inorganic pollutants that are hazardous to the environment. On the other hand, industrial wastewater can be regarded as a prospective source of fresh water, energy, and valuable raw materials. Conventional sewage treatment systems are often not efficient enough for the complete degradation of pollutants and they are characterized by high energy consumption. Moreover, the chemical energy that is stored in the wastewater is wasted. A solution to these problems is an application of photoelectrocatalytic treatment methods, especially when they are coupled with energy generation. The paper presents a general overview of the semiconductor materials applied as photoelectrodes in the treatment of various pollutants. The fundamentals of photoelectrocatalytic reactions and the mechanism of pollutants treatment as well as parameters affecting the treatment process are presented. Examples of different semiconductor photoelectrodes that are applied in treatment processes are described in order to present the strengths and weaknesses of the photoelectrocatalytic treatment of industrial wastewater. This overview is an addition to the existing knowledge with a particular focus on the main experimental conditions employed in the photoelectrocatalytic degradation of various pollutants with the application of semiconductor photoelectrodes.

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“…metal removal/recovery [99][100][101][102]; and, simultaneous generation of electricity and hydrogen [12,[103][104][105].…”

Section: Semiconductor Materials Applied In Photoelectrocatalytic Wasmentioning

confidence: 99%

Section: Single Semiconductor Photoelectrode Materialsmentioning

confidence: 99%

Semiconductor Electrode Materials Applied in Photoelectrocatalytic Wastewater Treatment—an Overview

Kuśmierek

2020

Catalysts

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“…For this purpose, rutile-coated graphite [9] and TiO 2 -coated nickel foam [10] have been proposed as photo-active cathodes in MFCs and other bioelectrochemical systems, for efficient electron transfer to the azo dyes molecules. However, since TiO 2 based photocatalysts mainly respond to the ultraviolet component of the solar radiation spectrum, Pd-modified silicon nanowire or graphite carbon nitride/BiOBr heterojunction have been further developed to widen the cathode response to the visible (up to 43% of the solar radiation) [11,12]. The conduction band potentials of these visible active photocatalysts (less than -0.54 V vs. standard hydrogen electrode, SHE) are lower than the theoretical electrode potential for hydrogen evolution (-0.414 V vs. SHE).…”

Section: Introductionmentioning

confidence: 99%

“…The conduction band potentials of these visible active photocatalysts (less than -0.54 V vs. standard hydrogen electrode, SHE) are lower than the theoretical electrode potential for hydrogen evolution (-0.414 V vs. SHE). Therefore, in these systems the generation of hydrogen further consumes electrons as a side reaction, decreasing the overall rate of azo dyes decolorization [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…In general, azo dyes mineralization is achieved through an easy initial break of the azo double bond and through the subsequent oxidation of the resulting recalcitrant intermediates [15,16]. Anaerobic conditions usually favor the break of the azo double bond, but are unsuitable for the subsequent mineralization of the intermediates [9][10][11]. Conversely, aerobic conditions favor azo dye mineralization but are disadvantageous for its decolorization [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Sequential anaerobic and electro-Fenton processes mediated by W and Mo oxides for degradation/mineralization of azo dye methyl orange in photo assisted microbial fuel cells

Wang

Huang

Quan

et al. 2019

Applied Catalysis B: Environmental

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The intensification of the degradation and mineralization of the azo dye methyl orange (MO) in contaminated water with simultaneous production of renewable electrical energy was achieved in photo-assisted microbial fuel cells (MFCs) operated sequentially under anaerobic-aerobic processes, in the presence of Fe(III) and W and Mo oxides catalytic species. In this novel process, the W and Mo oxides deposited on the graphite felt cathodes accelerated electron transfer and the reductive decolorization of MO. Simultaneously, the mineralization of MO and intermediate products was intensified by the production of hydroxyl radicals (HO•) produced by (i) the photoreduction of Fe(III) to Fe(II), and by (ii) the reaction of the photochemically and electrochemically produced Fe(II) with hydrogen peroxide, which was produced in-situ during the aerobic stage. Under anaerobic conditions, the reductive decolorization of MO was driven by cathodic electrons, while the partial oxidation of the intermediates proceeded through holes oxidation, producing N,N-dimethyl-p-phenylenediamine. In contrast, under aerobic conditions superoxide radicals (O 2 •-) were predominant to HO•, forming 4-hydroxy-N,N-dimethylaniline. In the presence of Fe(III) and under aerobic conditions, the oxidation of the intermediate products driven by HO• superseded that of O 2 •-, yielding phenol and amines, via the oxidation of 4-hydroxy-N,N-dimethylaniline and N,N-dimethyl-p-phenylenediamine. These sequential anaerobic and electro-Fenton processes led to the production of benzene and significantly faster oxidation reactions, compared to either the anaerobic or the aerobic operation in the presence of Fe(III). Complete degradation and mineralization (96.8 ± 3.5%) of MO (20 mg/L) with simultaneous electricity production (0.0002 kWh/kg MO) was therefore achieved with sequential anaerobic (20 min)-aerobic (100 min) operation in the presence of Fe(III) (10 mg/L). This study demonstrates an alternative and environmentally benign approach for efficient remediation of azo dye contaminated water with simultaneous production of renewable energy.

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Photochemical Biofuel Cells

et al. 2021

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A photobioelectrochemical Fuel Cell (PBEC-FC) relies on the synergic effect of electroactive and photo-electroactive microorganisms with or without photosensitive electrode to degrade organic matter for diverse bioelectrochemical application. In addition to wastewater treatment, PBEC-FC is also versatile in producing bioelectricity, biofuel, and pollutant degradation. PBEC-FC can come with a different configuration to accommodate for various applications under specific reaction. As a result of continuous research, there are three developing configurations which are: photosynthetic-BFC (PS-BFC), photovoltaic BFC (PV-BFC), and photoelectrode-BFC (PE-BFC). Studies have demonstrated that light-driven BFC has improved the substrate oxidation in the anode and concurrent bioelectrochemical reaction in the cathode as compared to dark conditions. Motivated by the increasing number of publications for this technology, the various configurations of PBEC-FC that suit different applications and their performance will be discussed in this chapter. Although the current performance of PBEC-FC remains low, but, with a continuous advancement to develop a durable and high photoactive material, this green technology will be realized into practicality in the future.

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Enhancement of methyl orange degradation and power generation in a photoelectrocatalytic microbial fuel cell

Cited by 76 publications

References 30 publications

Semiconductor Electrode Materials Applied in Photoelectrocatalytic Wastewater Treatment—an Overview

Semiconductor Electrode Materials Applied in Photoelectrocatalytic Wastewater Treatment—an Overview

Sequential anaerobic and electro-Fenton processes mediated by W and Mo oxides for degradation/mineralization of azo dye methyl orange in photo assisted microbial fuel cells

Photochemical Biofuel Cells

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