Mengni Tao, Zhao Jing, Zhengkai Tao et al.

Journal of Cleaner Production • 2021

Jiwei Jiang, Shixuan Zhang, Shengnan Li et al.

The Science of The Total Environment • 2021

Mrinal Kumar Sarma, Mohd Golam Abdul Quadir, Rupam Bhaduri et al.

Biosensors and Bioelectronics • 2018

Dongliang Wang, Jingping Hu, Jiakuan Yang et al.

International Journal of Hydrogen Energy • 2019

Muruganantham Rethinasabapathy, A.T. Ezhil Vilian, Seung Kyu Hwang et al.

Journal of Power Sources • 2020

Enren Zhang, Wenjing Zhai, Yue Luo et al.

Bioresource Technology • 2016

Adeniyi P. Adebule, Aderiye Bi, A. A. Adebayo

Annals of Applied Microbiology & Biotechnology Journal • 2018

The enhancement of bioelectricity generation in the Microbial Fuel Cell (MFC) necessitated the introduction of exogenous compound (s) (i.e. mediators). The effect of 1ml of various synthetic exogenous mediators including dyes and metallorganics such as Ethylene Diamine Tetra Acid [EDTA], potassium ferricyanide [K 3 Fe(CN) 6 ], methylene blue [MB], neutral red [NR] and potassium permanganate [KMnO 4 ] was investigated in a 21day study during electricity generation in an MFC. The maximum Power Density (PD) obtained without the addition of any mediator was 84.58mW/m 2 , while those MFCs which utilized mediators recorded higher energy yield. The highest power density and percentage energy contribution of 924.79mW/m 2 (993.39%) was obtained using K 3 Fe(CN) 6, while values obtained with EDTA [803.71mW/m 2 (850.24%)]; MB [340.45mW/m 2 (302.52%)] and KMnO 4 [192.14mW/m 2 (121.17%)] as mediators were appreciably higher. Further study on the use of these mediators showed inhibitory effects with the % reduction of microbial load in the following trend as MB (4.96%) < EDTA (6.13%) < NR (11.67%) < Ferricyanide (19.16%) < KMnO 4 (21.89%) when compared to the control. Although the application of mediators improved energy production, minimum inhibitory concentration of the mediators should be ascertained to prevent the eradication of electrogens during electricity production.

Rong‐Bin Song, Shuai Zhou, Dan Guo et al.

ACS Sustainable Chemistry & Engineering • 2019

The development of advanced anode materials is a significant step to improve the performance of microbial fuel cells (MFCs). Here, a core/satellite structured Fe3O4/Au nanocomposite-incorporated three-dimensional (3D) macroporous graphene foam (Fe3O4/Au NCs-3DGF) is fabricated by an effective method, which combines in situ growth, hydrothermal treatment, and freeze-drying technologies. Fe3O4/Au NCs-3DGF is proposed as a decent anode material for MFC. Fe3O4/Au nanocomposites improve the anode/bacteria interaction due to the high bio-affinity between Fe3O4 core and Shewanella oneidensis MR-1. Moreover, the Au satellites pave high-speed channels for electron transfer, avoiding the adverse influence from the poor conductivity of Fe3O4 core. After the incorporation into 3D macroporous graphene foam, the anode surface for bacterial attachment is expanded, while the bacterial penetration into anode interior is also realized. Benefiting from these advantages, Fe3O4/Au NCs-3DGF exhibits enhanced bacterial hosting ability and high-efficiency extracellular electron transfer, which together contribute to a 71-fold increase in the volumetric power density compared to the graphite rod counterpart (2980 ± 54 vs 41 ± 4 mW m–2). This work upgrades the fineness of the design of anode materials, which will provide some guidance for the future development of high-performance MFC anode.

Chengzhi Wang, Guanlan Wu, Xiaolin Zhu et al.

Chemosphere • 2022

Yamini Mittal, Md Tabish Noori, Tanveer Saeed et al.

Journal of Water Process Engineering • 2023

Xinxing Zhou, Yunzhi Xu, Xiaojie Mei et al.

Chemosphere • 2018

Chin‐Tsan Wang, Yan-Sian Huang, Thangavel Sangeetha et al.

Applied Energy • 2017

Weihuang Zhu, Min Yao, Haoxiang Gao et al.

The Science of The Total Environment • 2019

K. Chandrasekhar, Young‐Ho Ahn

Bioresource Technology • 2017

Aradhana Singh, Anubha Kaushik

Journal of Cleaner Production • 2021

Jun Li, Hejing Li, Jili Zheng et al.

Bioresource Technology • 2017

Ye Sun, Yaqiang Duan, Liang Hao et al.

ACS Applied Materials & Interfaces • 2016

The low electrocatalytic activity for oxygen reduction reaction (ORR) and the high cost of cathode catalyst in microbial fuel cells (MFCs) are the important factors that limit the practical applications. The metal-free nitrogen (N)-doped partly graphitized carbon (NPGC) as cathode catalyst is prepared at different temperatures (700-1050 °C) by using waste cornstalks as the carbon source and melamine as the N source. Scanning electron microscopy, X-ray diffraction, specific surface areas, and transmission electron microscopy have been used, in parallel with electrochemical activity tests including rotating disk electrode (RDE) and power output, to clarify how the active constituents and structure of NPGC influence the MFCs performance. Carbonization temperature has a significant effect on the porous structure and N-doped defects (pyridinic, pyrrolic, and graphitic N), which correspondingly influence the amount of active sites, ORR activity and long-time running durability in MFCs. The abundant functional oxygen-containing groups in the porous structure (1177.76 m 2 g -1 ) of NPGC (1000 °C) contribute to the fast adsorption of molecular O 2 onto the carbon skeleton. The N-induced charge delocalization facilitates the chemisorption of O 2 and cleavage of O-O bonds to effectively enhance the four-electron O 2 reduction on NPGC electrode. The maximum power density of NPGC-1000 is 1122 mW m -2 in MFCs, which is higher than that of Pt/C (988 mW m -2 ), and only has a decline of 10.2% after 80 days. This work provides a metal-free, high-efficiency, and cost-effective ORR electrocatalyst for MFCs.

Hongzhou Liu, Tie-zhu Chen, Nan Wang et al.

Applied Energy • 2024

Shima L. Holder, Ching‐Hwa Lee, Srinivasa R. Popuri

Environmental Science and Pollution Research • 2017

Nan Jiang, Manhong Huang, Jincheng Li et al.

Bioresource Technology • 2021

Xiangchun Quan, Hengduo Xu, Bo Sun et al.

International Biodeterioration & Biodegradation • 2018

Sze–Mun Lam, Jin–Chung Sin, Honghu Zeng et al.

Chemosphere • 2021

Khaoula Bensaida, Ibrahim Maamoun, Ramadan Eljamal et al.

Energy Conversion and Management • 2021

Na Zhao, Zhaokun Ma, Huaihe Song et al.

International Journal of Hydrogen Energy • 2018

Chunfeng Shao, Shiguang Zhuang, Haocheng Zhang et al.

Small • 2020

Nitrogen-coordinated single-atom catalysts (SACs) have emerged as a new frontier for accelerating oxygen reduction reaction (ORR) owing to the optimal atom efficiency and fascinating properties. However, augmenting the full exposure of active sites is a crucial challenge in terms of simultaneously pursuing high metal loading of SACs. Here, petal-like porous carbon nanosheets with densely accessible Fe-N 4 moieties (FeNC-D) are constructed by combining the space-confinement of silica and the coordination of diethylenetriaminepentaacetic acid. The resulted FeNC-D catalyst possesses an enhanced mesoporosity and a balanced hydrophobicity/hydrophilicity, which can facilitate mass transport and advance the exposure of inaccessible Fe-N 4 sites, resulting in efficient utilization of active sites. By virtue of the petal-like porous architecture with maximized active site density, FeNC-D demonstrates superior ORR performance in a broad pH range. Remarkably, when utilized as the air cathode in Zn-air battery (ZAB) and microbial fuel cell (MFC), the FeNC-D-based device displays a large power density (356 mW cm -2 for ZAB and 1041.3 mW m -2 for MFC) and possesses remarkable stability, substantially outperforming the commercial Pt/C catalyst.

Zeyu Fan, Jun Li, Wei Yang et al.

Chemical Engineering Journal • 2019

Meng Li, Yan-Wen Li, Xiaolong Yu et al.

The Science of The Total Environment • 2020

Long Zou, Zhisong Lu, Yunhong Huang et al.

Journal of Power Sources • 2017

Chao Li, Kexin Yi, Shaogang Hu et al.

Environmental Science and Ecotechnology • 2023

Microbial fuel cells (MFCs) incorporating air-breathing cathodes have emerged as a promising eco-friendly wastewater treatment technology capable of operating on an energy-free basis. However, the inevitable biofouling of these devices rapidly decreases cathodic catalytic activity and also reduces the stability of MFCs during long-term operation. The present work developed a novel microbial separator for use in air-breathing MFCs that protects cathodic catalytic activity. In these modified devices, microbes preferentially grow on the microbial separator rather than the cathodic surface such that biofouling is prevented. Trials showed that this concept provided low charge transfer and mass diffusion resistance values during the cathodic oxygen reduction reaction of 4.6 ± 1.3 and 17.3 ± 6.8 Ω, respectively, after prolonged operation. The maximum power density was found to be stable at 1.06 ± 0.07 W m -2 throughout a long-term test and the chemical oxygen demand removal efficiency was increased to 92% compared with a value of 83% for MFCs exhibiting serious biofouling. In addition, a cathode combined with a microbial separator demonstrated less cross-cathode diffusion of oxygen to the anolyte. This effect indirectly induced the growth of electroactive bacteria and produced higher currents in air-breathing MFCs. Most importantly, the present microbial separator concept enhances both the lifespan and economics of air-breathing MFCs by removing the need to replace or regenerate the cathode during long-term operation. These results indicate that the installation of a microbial separator is an effective means of stabilizing power generation and ensuring the cost-effective performance of air-breathing MFCs intended for future industrial applications.

Shu-Hui Liu, Shen‐Long Tsai, Pei-Yu Guo et al.

Chemosphere • 2019

Peng Liang, Changyong Zhang, Yong Jiang et al.

Applied Energy • 2016

Ravinder Kumar, Lakhveer Singh, A. W. Zularisam et al.

Bioresource Technology • 2016

Qiu Bing, Yongyou Hu, Liang Chen et al.

Bioresource Technology • 2019

Guiping Ren, Yuan Sun, Anhuai Lu et al.

Journal of Power Sources • 2018

Kartik Aiyer

Heliyon • 2021

Microbial communities are catalysts that drive the operation of microbial fuel cells (MFCs). In this study, the use of a defined co-culture of Escherichia coli and Pseudomonas aeruginosa towards improved power generation in MFCs is described. The co-culture has been initially evaluated for substrate consumption, biofilm formation and microbial electron transfer activity. The co-culture gave an enhanced power density of 190.44 mW m -2 , while E. coli and P. aeruginosa as pure cultures generated lesser power densities of 139.24 and 158.76 mW m -2 respectively. The photosynthetic alga Chlorella vulgaris was then inoculated in the cathode chamber. Co-cultures in the presence of C. vulgaris improved the mean power density from 175 mW m -2 to 248 mW m -2 , a 41.7% rise. A synergistic effect was observed when the co-cultures were coupled with C. vulgaris . Combining co-cultures with photosynthetic MFCs offers a lot of promise in studying mechanisms and expanding the nature of applications.

Tao Li, Hai–Liang Song, Han Xu et al.

Journal of Hazardous Materials • 2021

Xiujun Wang, Chunfang Yuan, Chunfeng Shao et al.

Environmental Research • 2019

M. Amirul Islam, Baranitharan Ethiraj, Chin Kui Cheng et al.

Industrial & Engineering Chemistry Research • 2017

Although exogenous mediators can distinctly enhance the performance of yeast driven microbial fuel cell (MFC), the possibility of mediator’s toxicity, environmental risk, and cost are the main challenges facing toward its application in MFCs. Therefore, the use of naturally produced electron shuttles for unmediated yeast would be of great interest since it can solve most of the above-mentioned problems. The present study is to investigate the possibility of the use of electron shuttle producing bacteria Klebsiella pneumonia (K. pneumonia) to boost up the performance of yeast Lipomyces starkeyi (L. starkeyi) driven MFC. The MFCs inoculated with L. starkeyi and K. pneumoniae coculture achieved a maximum power density of 12.87 W/m3 which is about 3 and 6 times higher than that of MFC solely inoculated with pure yeast and bacteria, respectively, demonstrating that the yeast cells have successfully utilized the reduced electron shuttles excreted by the bacteria. The occurrence of the mutualistic interactions was further supported by the CV and EIS results. The findings of this work suggest that the use of mutualistic interaction of yeast and bacteria could be a new way to increase the performance of the MFCs.

Tommy Pepé Sciarria, Maida Aysla Costa de Oliveira, Barbara Mecheri et al.

Journal of Power Sources • 2020

Zhou Fang, Sichao Cheng, Xian Cao et al.

Environmental Technology • 2016

The effects of electrode gap, PB solution concentration and azo dye on the wastewater treatment and electricity generation of microbial fuel cell coupled constructed wetland (CW-MFC) were studied. The electrode gap had obvious influence on the decolorization, while the influence of PB concentration on the decolorization was not obvious. The best decolorization efficiency was 91.05% and was gained when the electrode gap was 13.2 cm. The smaller the electrode gap, the smaller the ohmic resistance. However, a too small electrode gap would reduce the electricity generation. The best PB concentration in this study was 50 mM. In the glucose group, when the PB concentration was 50 mM, the power density was enhanced to 0.38 W/m 3 , while the PB concentration was 5 mM, the power density was only 0.14 W/m 3 . In the ABRX3 group, when the PB concentration was 50 mM, the power density was 0.18 W/m 3 , while when the PB concentration was 5 mM, the power density was 0.12 W/m 3 . The electricity generation performance of the CW-MFC was enhanced with an increase in running time. Long-time running CW-MFC got a higher cathode potential and a smaller internal resistance.