Controlled Layer-By-Layer Deposition of Carbon Nanotubes on Electrodes for Microbial Fuel Cells

Wu, Wenguo; Niu, Hao; Yang, Dayun; Wang, Shibin; Wang, Jiefu; Lin, Jia Horng; Hu, Chaoyi

doi:10.3390/en12030363

Cited by 10 publications

(7 citation statements)

References 52 publications

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“…Unfortunately, in real conditions, the choice of catalyst is mainly come to by experimental methods [37,38]. For this reason, experimental research on the selection of new catalysts for MFCs is still conducted [14,29,30,[33][34][35][36][37][38][39][40]. Herein, we demonstrate the possibility of using Cu-B alloy as a cathode catalyst for MFCs for municipal wastewater treatment and electricity production.…”

Section: Anode C H O + 6h O → 6co + 24h + 24ementioning

confidence: 98%

Wastewater Treatment and Electricity Production in a Microbial Fuel Cell with Cu–B Alloy as the Cathode Catalyst

Włodarczyk

2019

Catalysts

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The possibility of wastewater treatment and electricity production using a microbial fuel cell with Cu–B alloy as the cathode catalyst is presented in this paper. Our research covered the catalyst preparation; measurements of the electroless potential of electrodes with the Cu–B catalyst, measurements of the influence of anodic charge on the catalytic activity of the Cu–B alloy, electricity production in a microbial fuel cell (with a Cu–B cathode), and a comparison of changes in the concentration of chemical oxygen demand (COD), NH4+, and NO3– in three reactors: one excluding aeration, one with aeration, and during microbial fuel cell operation (with a Cu–B cathode). During the experiments, electricity production equal to 0.21–0.35 mA·cm−2 was obtained. The use of a microbial fuel cell (MFC) with Cu–B offers a similar reduction time for COD to that resulting from the application of aeration. The measured reduction of NH4+ was unchanged when compared with cases employing MFCs, and it was found that effectiveness of about 90% can be achieved for NO3– reduction. From the results of this study, we conclude that Cu–B can be employed to play the role of a cathode catalyst in applications of microbial fuel cells employed for wastewater treatment and the production of electricity.

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Section: Anode C H O + 6h O → 6co + 24h + 24ementioning

confidence: 98%

Wastewater Treatment and Electricity Production in a Microbial Fuel Cell with Cu–B Alloy as the Cathode Catalyst

Włodarczyk

2019

Catalysts

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“…However, this function only leads to an output in the form of a theoretical value, which usually deviates significantly from the values that are obtained experimentally in comparable circumstances [38,66]. Therefore, it is necessary to conduct experimental research concerned with the selection of a catalyst suitable for a specific substance (in this case a substance employed as the waste material) that further constitutes the fuel applied in MFC [1,2,38,[48][49][50][51][52][53][54][55]66]. The selection of a catalyst has an effect on the final cost of electricity production and the expenses associated with pre-treatment of wastewater for the needs of MFC.…”

Section: Introductionmentioning

confidence: 98%

“…Therefore, it is necessary to look for other catalysts that do not contain precious metals [40][41][42][43][44][45][46][47]. As electrodes (also as catalysts) do not contain precious metals, different electrode materials (carbon fiber brush, carbon felt, carbon foam, carbon cloth, graphite paper, and others) were analyzed in various works [48][49][50][51][52][53][54][55][56]. Of these materials, the most efficient anode material is carbon felt.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Analysis of Ni–Co Catalyst Use for Electricity Production and COD Reduction in Microbial Fuel Cells

Włodarczyk

2019

Catalysts

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Microbial fuel cells (MFCs) are devices than can contribute to the development of new technologies using renewable energy sources or waste products for energy production. Moreover, MFCs can realize wastewater pre-treatment, e.g., reduction of the chemical oxygen demand (COD). This research covered preparation and analysis of a catalyst and measurements of changes in the concentration of COD in the MFC with a Ni–Co cathode. Analysis of the catalyst included measurements of the electroless potential of Ni–Co electrodes oxidized for 1–10 h, and the influence of anodic charge on the catalytic activity of the Ni–Co alloy (for four alloys: 15, 25, 50, and 75% concentration of Co). For the Ni–Co alloy containing 15% of Co oxidized for 8 h, after the third anodic charge the best catalytic parameters was obtained. During the MFC operation, it was noted that the COD reduction time (to 90% efficiency) was similar to the reduction time during wastewater aeration. However, the characteristic of the aeration curve was preferred to the curve obtained during the MFC operation. The electricity measurements during the MFC operation showed that power equal to 7.19 mW was obtained (at a current density of 0.47 mA·cm−2).

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“…Furthermore, by varying processing conditions (such as ionic strength, pH, types of polyelectrolytes, molecular weight, and temperature) during polyelectrolyte deposition, the physicochemical properties and morphology of multilayers can be simply controlled [28][29][30]. Functionalized multilayers can be created with a variety of combinations of materials such as quantum dots, biological molecules, dendrimers, and carbon nanomaterials [31][32][33][34]. LbL assembly is mainly a result of electrostatic interaction in most cases, but other molecular interactions between the LbL materials, including hydrogen bonds, coordination bonds, charge transfer, hydrophobic interactions, and the combined interaction of the above forces have been shown to be driving forces to build up multilayer films [35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Organic Thermoelectric Multilayers with High Stretchiness

Cho

Son

2019

Nanomaterials

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A stretchable organic thermoelectric multilayer is achieved by alternately depositing bilayers (BL) of 0.1 wt% polyethylene oxide (PEO) and 0.03 wt% double walled carbon nanotubes (DWNT), dispersed with 0.1 wt% polyacrylic acid (PAA), by the layer-by-layer assembly technique. A 25 BL thin film (~500 nm thick), composed of a PEO/DWNT-PAA sequence, displays electrical conductivity of 19.6 S/cm and a Seebeck coefficient of 60 µV/K, which results in a power factor of 7.1 µW/m·K2. The resultant nanocomposite exhibits a crack-free surface up to 30% strain and retains its thermoelectric performance, decreasing only 10% relative to the unstretched one. Even after 1000 cycles of bending and twisting, the thermoelectric behavior of this nanocomposite is stable. The synergistic combination of the elastomeric mechanical properties (originated from PEO/PAA systems) and thermoelectric behaviors (resulting from a three-dimensional conjugated network of DWNT) opens up the possibility of achieving various applications such as wearable electronics and sensors that require high mechanical compliance.

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Controlled Layer-By-Layer Deposition of Carbon Nanotubes on Electrodes for Microbial Fuel Cells

Cited by 10 publications

References 52 publications

Wastewater Treatment and Electricity Production in a Microbial Fuel Cell with Cu–B Alloy as the Cathode Catalyst

Wastewater Treatment and Electricity Production in a Microbial Fuel Cell with Cu–B Alloy as the Cathode Catalyst

Preparation and Analysis of Ni–Co Catalyst Use for Electricity Production and COD Reduction in Microbial Fuel Cells

Organic Thermoelectric Multilayers with High Stretchiness

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