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Journal of Environmental Sciences 2018年第8期30卷 54-62页

作者： Yin Zhou Dong Xu Enrong Xiao Dan Xu Peng Xu Xia Zhang Qiaohong Zhou Feng He Zhenbin Wu State Key Laboratory of Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China University of Chinese Academy of Sciences Beijing 100049China School of Resource and Environmental Engineering Wuhan University of TechnologyWuhan 430070China

To find suitable wetland plants for constructed wetland-microbial fuel cells（CW-MFCs）,four commonly used wetland plants, including Canna indica, Cyperus alternifolius L., Acorus calamus, and Arundo donax, were investigated for their electrogenic performance and physiological changes during non-growing seasons. The maximum power output of12.82 mW/m^2 was achieved in the A. donax CW-MFC only when root exudates were being released. The results also showed that use of an additional carbon source could remarkably improve the performance of electricity generation in the C. indica and A. donax CW-MFCs at relatively low temperatures（2–15°C）. However, A. calamus withered before the end of the experiment, whereas the other three plants survived the winter safely, although their relative growth rate values and the maximum quantum yield of PSII（Fv/Fm） significantly declined, and free proline and malondialdehyde significantly accumulated in their *** the basis of correlation analysis, temperature had a greater effect on plant physiology than voltage. The results offer a valuable reference for plant selection for CW-MFCs.

关键词： Wetland plants microbial fuel cells Physiological changes Power production

Tuning electrospinning hierarchically porous nanowires anode for enhanced bioelectrocatalysis in microbial fuel cells

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Nano Research 2022年第6期15卷 5089-5097页

作者： Shiwei Qian Xiaoshuai Wu Zhuanzhuan Shi Xiaofen Li Xin Sun Yongjia Ma Wei Sun Chunxian Guo ChangMing Li Institute for Advanced Cross-field Science and College of Life Science Qingdao UniversityQingdao 266071China Institute of Materials Science and Devices School of Materials Science and EngineeringSuzhou University of Science and TechnologySuzhou 215011China College of Chemistry and Chemical Engineering Hainan Normal UniversityHaikou 571158China

Pore structure plays critical roles in electrode kinetics but very challenging to tailor porous nanowires with rationally distributed pore sizes in a bioelectrochemical *** a hierarchically porous nanowires-material is delicately tuned for an optimal pore structure by adjusting the weight percentage of SiO_(2)-hard template in an electrospinning precursor *** asprepared optimal electrospinning nanowires further used as an anode of microbial fuel cells(MFCs),delivering a maximum output power density of 1,407.42 mW·m^(−2)with 4.24 and 10 times higher than that of the non-porous fiber and carbon cloth anode,*** great enhancement is attributed to the rational pore structure which offers the largest surface area while the rich-mesopores well match with the size of electron mediators for a high density of catalytic *** work provides thoughtful insights to design of hierarchical porous electrode for high-performance MFCs and other bioelectrochemical system devices.

关键词： hierarchically porous nanowires microbial fuel cells interfacial electron transfer biofilm

Combining biological denitrification and electricity generation in methane-powered microbial fuel cells

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Journal of Environmental Sciences 2023年第8期130卷 212-222页

作者： Linpeng Yu Eryi Zhang Lin Yang Shiqi Liu Christopher Rensing Shungui Zhou Resources and Environment Fujian Agriculture and Forestry UniversityFuzhou 350002China Cranfield University CranfieldBedfordshire MK43 OALUK Biofuels Institute School of Environment and Safety EngineeringJiangsu UniversityZhenjiang 212013China

Methane has been demonstrated to be a feasible substrate for electricity generation in microbial fuel cells(MFCs)and denitrifying anaerobic methane oxidation(DAMO).However,these two processes were evaluated separately in previous studies and it has remained unknown whether methane is able to simultaneously drive these *** we investigated the co-occurrence and performance of these two processes in the anodic chamber of *** results showed that methane successfully fueled both electrogenesis and ***,the maximum nitrate removal rate was significantly enhanced from(1.4±0.8)to(18.4±1.2)mg N/(L·day)by an electrogenic *** the presence of DAMO,the MFCs achieved a maximum voltage of 610 mV and a maximum power density of 143±12 mW/m^(2).Electrochemical analyses demonstrated that some redox substances(***)were likely involved in electrogenesis and also in the denitrification ***-throughput sequencing indicated that the methanogen Methanobacterium,a close relative of Methanobacterium espanolae,catalyzed methane oxidation and cooperated with both exoelectrogens and denitrifiers(e.g.,Azoarcus).This work provides an effective strategy for improving DAMO in methane-powered MFCs,and suggests that methanogens and denitrifiers may jointly be able to provide an alternative to archaeal DAMO for methane-dependent denitrification.

关键词： Anaerobic methane oxidation Denitrification microbial fuel cells Electricity generation Electroactive compounds Methanobacterium

Sustainable biochar as an electrocatalysts for the oxygen reduction reaction in microbial fuel cells

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Green Energy & Environment 2021年第5期6卷 644-659页

作者： Shengnan Li Shih-Hsin Ho Tao Hua Qixing Zhou Fengxiang Li Jingchun Tang College of Environmental Science and Engineering Ministry of Education Key Laboratory of Pollution Processes and Environmental CriteriaRemediation and Pollution Control for Urban Ecological EnvironmentalNankai UniversityTianjin300350China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090China

microbial fuel cells(MFCs)have gained remarkable attention as a novel wastewater treatment that simultaneously generates *** low activity of the oxygen reduction reaction(ORR)remains one of the most critical bottlenecks limiting the development of *** date,although research on biochar as an electrocatalyst in MFCs has made tremendous progress,further improvements are needed to make it economically ***,biochars have been considered to be ORR electrocatalysts with developmental *** this review,the ORR mechanism and the essential requirements of ORR catalysts in MFC applications are ***,the focus is to highlight the material selection,properties,and preparation of biochar electrocatalysts,as well as the evaluation and measurement of biochar ***,in order to provide comprehensive information on the specific applications of biochars in the field of MFCs,their applications as electrocatalysts,are then discussed in detail,including the uses of nitrogen-doped biochar and other heteroatom-doped biochars as electrocatalysts,poisoning tests for biochar catalysts,and the cost estimation of biochar ***,profound insights into the current challenges and clear directions for future perspectives and research are concluded.

关键词： Biochar Electrocatalysts Oxygen reduction reaction microbial fuel cells Pyrolysis

Melamine modified carbon felts anode with enhanced electrogenesis capacity toward microbial fuel cells

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Journal of Energy Chemistry 2017年第1期26卷 81-86页

作者： Yang'en Xie Zhaokun Ma Huaihe Song Zachary A.Stoll Pei Xu State Key Laboratory of Chemical Resource Engineering Beijing Key Laboratory of Electrochemical Process and Technology for Materials Beijing University of Chemical Technology Department of Civil Engineering New Mexico State University

Surface electropositivity and low internal resistance are important factors to improve the anode performance in microbial fuel cells (MFCs). Nitrogen doping is an effective way for the modification of traditional carbon materials. In this work, heat treatment and melamine were used to modify carbon felts to enhance electrogenesis capacity of MFCs. The modified carbon felts were characterized using X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), atomic force microscopy (AFM) and malvern zeta potentiometer. Results show that the maximum power densities under heat treatment increase from 276.1 to 423.4 mW/m(2) (700 degrees C) and 461.5 mW/m(2) (1200 degrees C) and further increase to 472.5 mW/m(2) (700 degrees C) and 515.4 mW/m(2) (1200 degrees C) with the co-carbonization modification of melamine. The heat treatment reduces the material resistivity, improves the zeta potential which is beneficial to microbial adsorption and electron transfer. The addition of melamine leads to the higher content of surface pyridinic and quaternary nitrogen and higher zeta potential. It is related to higher MFCs performance. Generally, the melamine modification at high temperature increases the feasibility of carbon felt as MFCs's anode materials. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.

关键词： microbial fuel cells Anode materials Carbon felts Modification Melamine

3-Aminopropyltriethoxysilane Complexation with Iron Ion Modified Anode in Marine Sediment microbial fuel cells with Enhanced Electrochemical Performance

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Journal of Ocean University of China 2021年第3期20卷 581-589页

作者： ZAI Xuerong GUO Man HAO Yaokang HOU Shaoxin YANG Zhiwei LI Jia LI Yang JI Hongwei FU Yubin College of Chemistry and Chemical Engineering the Key Laboratory of Marine Chemistry Theory and TechnologyMinistry of EducationOcean University of ChinaQingdao 266100China School of Materials Science and Engineering Ocean University of ChinaQingdao 266100China

Anode modification plays a key role in higher power output in marine sediment microbial fuel cells(MSMFCs).A low-molecular organosilicon compound(3-aminopropyltriethoxysilane)was grafted onto the surface of carbon felt using chemical method and a composite modified anode was prepared through organic ligands coordination Fe^(3+)for better electro-chemical *** show that the biofilm resistance of the composite modified anode(2707Ω)is 1.3 times greater than that of the unmodified anode(2100Ω),and its biofilm capacitance also increases by 2.2 times,indicating that the composite modification pro-motes the growth and attachment of electroactive bacteria on the *** specific capacitance(887.8 Fm^(−2))is 3.7 times higher than that of unmodified anode,generating a maximum current density of 1.5Am^(−2).In their Tafel curves,the composite modified anodic exchange current density(5.25×10^(−6)Acm^(−2))is 5.8 times bigger than that of unmodified anode,which suggests that the electro-chemical activity of redox,anti-polarization ability and electron transfer kinetic activity are significantly *** marine sediment microbial fuel cell with the composite modified anode generates the higher power densities than the blank(203.8mWm^(−2) versus 45.07mWm^(−2)),and its current also increases by 4.4 *** free amino groups on the anode surface expands a creative idea that the modified anode ligates the natural Fe(Ⅲ)ion in sea water in the MSMFCs for its higher power output.

关键词： 3-aminopropyltriethoxysilane iron ion composite modified carbon anode electro-chemical performances marine sediment microbial fuel cells

Nitrogen and Sulfur Co-doped Porous Carbon Derived from ZIF-8 as Oxygen Reduction Reaction Catalyst for microbial fuel cells

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Journal of Wuhan University of Technology(Materials Science) 2020年第2期35卷 280-286页

作者： HAN Wuli YAN Xuemin JIANG Yu PING Mei DENG Xiaoqing ZHANG Yan College of Chemistry and Environmental Engineering Yangtze UniversityJingzhou 434023China

Nitrogen and sulfur co-doped porous nanocarbon (ZIF-C-N-S) catalyst was successfully synthesized derived from ZIF-8 and thiourea *** electrochemical measurements indicate that the as-obtained ZIF-C-N-S catalyst exhibits higher electrocatalytic activity for oxygen reduction reaction (ORR) in alkaline electrolyte and superior durability-longer than commercial Pt/C *** enhancment of electrocatalytic activity mainly be come from the open pore structure,large specific surface area as well as the synergistic effect resulted from the co-doping of N and S *** addition,the ZIF-C-N-S catalyst is also used as the air cathode catalyst in the microbial fuel cell (MFC) *** maximum power density and stable output voltage of ZIF-C-N-S based MFC are 1315 mW/m2 and 0.48 V,respectively,which is better than that of Pt/C based MFC.

关键词： electrocatalyst oxygen reduction reaction microbial fuel cells nitrogen and sulfur co-doped

Metal-based cathode catalysts for electrocatalytic ORR in microbial fuel cells:A review

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Chinese Chemical Letters 2024年第5期35卷 85-96页

作者： Yaxin Sun Huiyu Li Shiquan Guo Congju Li School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China

microbial fuel cells(MFCs)have a simple structure and excellent pollutant treatment and power generation ***,the slow kinetics of the oxygen reduction reaction(ORR)at the MFC cathode limit power *** electrochemical performance of MFCs can be improved through *** far,metal-based catalysts have shown astonishing results in the field of electrocatalysis,enabling MFC devices to demonstrate power generation capabilities comparable to those of Pt,thus showing enormous *** article reviews the research progress of meta-based MFC cathode ORR catalysts,including the ORR reaction mechanism of MFC,different types of catalysts,and preparation *** catalytic effects of different catalysts in MFC are compared and *** discussing the practical application and expanded manufacturing of catalysts,we summarize the key challenges that must be addressed when using metal-based catalysts in MFC,with the aim of providing a scientific direction for the future development of advanced materials.

关键词： microbial fuel cells Metal-based cathode catalysts Oxygen reduction reaction Noble metal catalysts MOFs M-N-C Single-atom Transition metal oxides

Hierarchically Porous and Defective Carbon Fiber Cathode for Efficient Zn‑Air Batteries and microbial fuel cells

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Advanced Fiber Materials 2022年第4期4卷 795-806页

作者： Daohao Li Xiaojing Long Yaqian Wu Huijie Hou Xueyao Wang Jun Ren Lijie Zhang Dongjiang Yang Yanzhi Xia State Key Laboratory of Bio‑Fibers and Eco‑Textiles Collaborative Innovation Center of Marine Biobased Fibers and Ecological TextilesInstitute of Marine Biobased MaterialsCollege of Materials Science and EngineeringCollege of Environmental Science and EngineeringQingdao UniversityQingdao 266071People’s Republic of China School of Environmental Science and Engineering Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China School of Chemical and Environmental Engineering North University of ChinaTaiyuan 030051People’s Republic of China

Developing low-cost,efficient oxygen reduction reaction(ORR)catalysts to replace Pt-based materials is urgently required for the application of Zn-air batteries(ZABs)and microbial fuel cells(MFCs).In this work,meso-microporous carbon fibers with tunable defect density were synthesized by carrageenan fibers.A highly defective carbon fiber(HDCFs)was produced which exhibited an outstanding ORR catalytic activity,reaching to the half-wave potential of 0.841 and 0.44 V in alkaline and neutral electrolytes,*** HDCFs can also act as highly efficient air cathodes for ZABs(delivered potential of 0.69 V and power density of 220 mW cm^(–2) at 300 mA cm^(–2))and MFCs(high power density of 69.7 mW cm^(–2)).Simulation by the density functional theory indicated that a high density of defections in a carbon based framework can remarkably modulate the electrical *** instance the charge entrapments in the carbon active sites may reduce the energy barrier of ORR.

关键词： Carbon fiber Defective structure Oxygen reduction reaction Zn-air batteries microbial fuel cells

Tailoring Iron-Ion Release of Cellulose-Based Aerogel-Coated Iron Foam for Long-Term High-Power microbial fuel cells

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Transactions of Tianjin University 2024年第5期30卷 436-447页

作者： Zhengyang Ni Huitao Yu Haoran Wang Mengmeng Qin Feng Li Hao Song Xiangyu Chen Yiyu Feng Wei Feng School of Material Science and Engineering Tianjin UniversityTianjin 300350China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 100083China

The presence of iron(Fe) has been found to favor power generation in microbial fuel cells(MFCs). To achieve long-term power production in MFCs, it is crucial to effectively tailor the release of Fe ions over extended operating periods. In this study, we developed a composite anode(A/IF) by coating iron foam with cellulose-based aerogel. The concentration of Fe ions in the anode solution of A/IF anode reaches 0.280 μg/mL(Fe^(2+) vs. Fe^(3+) = 61%:39%) after 720 h of aseptic primary cell operation. This value was significantly higher than that(0.198 μg/mL, Fe^(2+) vs. Fe^(3+) = 92%:8%) on uncoated iron foam(IF), indicating a continuous release of Fe ions over long-term operation. Notably, the resulting MFCs hybrid cell exhibited a 23% reduction in Fe ion concentration(compared to a 47% reduction for the IF anode) during the sixth testing cycle(600-720 h). It achieved a high-power density of 301 ± 55 mW/m^(2) at 720 h, which was 2.62 times higher than that of the IF anode during the same period. Furthermore, a sedimentary microbial fuel cell(SMFCs) was constructed in a marine environment, and the A/IF anode demonstrated a power density of 103 ± 3 mW/m^(2) at 3240 h, representing a 75% improvement over the IF anode. These findings elucidate the significant enhancement in long-term power production performance of MFCs achieved through effective tailoring of Fe ions release during operation.

关键词： microbial fuel cells Coating Fe ions Tailor release Long-term