The addition of ortho-hexagon nano spinel Co 3 O 4  to improve the performance of activated carbon air cathode microbial fuel cell

Ge, Baochao; Li, Kexun; Fu, Zhen‐Guo; Pu, Liangtao; Zhang, Xi

doi:10.1016/j.biortech.2015.06.054

Cited by 92 publications

(42 citation statements)

References 33 publications

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“…To improve the efficiency of the hydrogen production, researchers work hard on modifying the nanomaterials [3,4,5,6]. Moreover, doping rare metals on semiconductor nanomaterials, changing the morphology of the nanomaterials and synthesis of complex nanomaterials are hot means that can be employed to improve the photocatalytic activity [7,8,9,10,11,12,13,14,15,16,17,18]. Maeda studied the photocatalytic activity of Rutile TiO 2 doped by Ru, Rh, Ir, Pt or Au, with the results showing that the most water splitting amount of H 2 and O 2 for 4 h is 56.6 μmol and 26.5 μmol, respectively, when Pt doping amount is at 1 wt.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, some nanomaterials (La 2 Ti 2 O 7 , PbTiO 3 , SrTiO 3 , etc.) also play important roles in water splitting [9,10,11,12,13,14,15,16,17]. The water splitting amount of H 2 is 166.67 μmol/h·g when Au and reducing graphene oxide doped La 2 Ti 2 O 7 act as photocatalyst [11].…”

Section: Introductionmentioning

confidence: 99%

“…However, typically, the p type Co 3 O 4 semiconductor cannot be used on overall water splitting [23]. Some studies researched on changing the band gap of Co 3 O 4 ; nevertheless, the constraints of these methods are high cost and difficult controlling processes [12,13,14,15,16,17,24]. Therefore, a new p-Co 3 O 4 /n-TiO 2 photococatalyst is designed for overall pure water splitting under visible light irradiation, and the Co 3 O 4 and TiO 2 nanoparticles is, to the best of our knowledge, combined in nano-scale for the first time [25,26,27].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of p-Co3O4/n-TiO2 Nanoparticles for Overall Water Splitting under Visible Light Irradiation

et al. 2016

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p-Co3O4/n-TiO2 nanoparticles (~400 nm) for photocatalysis were prepared via carbon assisted method and sol-gel method in this work. The paper also studied the application of visible light illuminated p-Co3O4/n-TiO2 nanocomposites cocatalyst to the overall pure water splitting into H2 and O2. In addition, the H2 evolution rate of the p-Co3O4/n-TiO2 nanocomposites is 25% higher than that of the pure Co3O4 nanoparticles. Besides, according to the results of the characterizations, the scheme of visible light photocatalytic water splitting is proposed, the Co3O4 of the nanocomposites is excited by visible light, and the photo-generated electrons and holes existing on the conduction band of Co3O4 and valence band of TiO2 have endowed the photocatalytic evolution of H2 and O2 with higher efficiency. The optimal evolution rate of H2 and O2 is 8.16 μmol/h·g and 4.0 μmol/h·g, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis of p-Co3O4/n-TiO2 Nanoparticles for Overall Water Splitting under Visible Light Irradiation

et al. 2016

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“…Significant reduction of the total resistance was observed and a large number of active sites were brought in by higher micropore surface area leading to higher activity for ORR. As a result, the ultimate power density of 1500 ± 14 mWm -2 was produced which was said to be 97.36% and 41.24% greater than the air cathode with the plain AC and commercial Co 3 O 4 respectively [39].…”

Section: Transition Metal/oxides Dopingmentioning

confidence: 99%

“…For instance, a MFC well fitted with an AC cathode bonded with a polytetrafluoroethylene (PTFE) and the current collected by nickel brought about 1220 mWm −2 greater to 1060 mWm −2 achieved using a Pt catalyst cathode (0.5 mg-Pt cm −2 ) and a Nafion binder [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] ) AC powder [50].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Catalyst Efficiency of Activated Carbon for Oxygen Reduction Reaction in Air Cathode Microbial Fuel Cell Application

Muhoza¹,

Ma²,

Kalakodio³

et al. 2017

Int J Waste Resour

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IntroductionMicrobial fuel cell (MFC) is a potential environmental friendly bioelectrochemical system as it combines treatment of organic wastes and electric energy generation [1][2][3][4]. In MFCs, the electrochemically active microorganisms' biofilm colonizes the anodic surface thus oxidizing organic pollutants producing electrons and protons. Electrons are transferred through an external circuit to the cathode where are received by the terminal electron acceptor while protons migrate through the membrane or solution to the cathode to keep electrical neutrality which creates potential difference [1,5]. Several applications of this technology such as hydrogen gas production [6], hydrogen peroxide generation [7], desalination [8][9][10], remote sensors and monitoring devices [11,12] metal recovery at cathode [13] and robots [12,14] to mention but few, have been studied and left researchers with more innovation ideas in the field. Having electrochemical processes catalyzed by biological processes in addition to some other design parameters such as engineering of microbial biofilm structure, decrypting electron transfer mechanisms, cell/reactor configuration, electrode materials and geometries, substrate concentration, retention time, and optimizing cathode catalysts [15,16] makes this system more sensitive to internal losses and gives it a certain level of complexity [17,18]. This and other challenges that are still unanswered are the bottlenecks for MFC application in real environment [15,19]. Therefore, current researches focus on limiting factors and ways to curb their effects thus increasing the performance [2,20,21]. Among others, is trying different MFC design configurations where MFC aircathode proved to more advantageous over double chamber for scaling up because of its simple structure, low cost and direct use oxygen in air, which could removes aeration from conventional wastewater treatment process [5,22]. Due to its high reduction potential and inexhaustible source, Oxygen is the most fairly used terminal electron acceptor and is considered to be competent for MFC air-cathode application and scale up as it plays a critical role in both organic oxidation and energy recovery at the cathode [23]. AbstractMicrobial fuel cell (MFC) air cathode present a great potential among other configurations due to its simple design, low cost and direct use oxygen from air as terminal electron acceptor which could help to save tremendous energy used for aeration in conventional wastewater treatment. However, at the cathode oxygen reduction reaction which is vital to generate high power density is naturally slow, therefore a catalyst is needed to overcome its reaction over-potential. Platinum (Pt) is the standard used catalyst in large number of oxidation reduction reactions whether in basic or acidic electrolytes. But, due to its high cost and limited resources it doesn't make it a sustainable candidate for scaling up of this juvenile technology. Activated carbon was found to be a low cost and environmental friendly Ox...

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Progress in Development of Electrode Materials in Microbial Fuel Cells

Pareek

Mohan

2019

Bioelectrochemical Interface Engineering

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The addition of ortho-hexagon nano spinel Co 3 O 4 to improve the performance of activated carbon air cathode microbial fuel cell

Cited by 92 publications

References 33 publications

Synthesis of p-Co3O4/n-TiO2 Nanoparticles for Overall Water Splitting under Visible Light Irradiation

Synthesis of p-Co3O4/n-TiO2 Nanoparticles for Overall Water Splitting under Visible Light Irradiation

Enhancing Catalyst Efficiency of Activated Carbon for Oxygen Reduction Reaction in Air Cathode Microbial Fuel Cell Application

Progress in Development of Electrode Materials in Microbial Fuel Cells

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