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Gao Y, Huang J, Zhang L, Zhu Y, Yang P, Xue L, Wang N, He W. A three-dimensional phenolic-based carbon anode for microbial electrochemical system with customized macroscopic pore structure to promote interior bacteria colonization. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 859:160131. [PMID: 36372162 DOI: 10.1016/j.scitotenv.2022.160131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 11/06/2022] [Accepted: 11/07/2022] [Indexed: 06/16/2023]
Abstract
Microbial electrochemical system (MES) is an emerging wastewater treatment technology that compensates the energy demands of containments removal by in situ converting the chemical energy of organic pollutants. As the structure for exoelectrogens and the reaction site of extracellular electron transfer (EET), the anode is essential for MES. The future commercial application of MES requires efficiency and large-scale fabrication available anode. In this study, a 3D anode with millimeter-scale pores (3D-MPA) was successfully constructed by sacrificial template method, with low-cost phenolic resin as carbon precursor and polymethyl methacrylate (PMMA) pellets as template. With customized and ordered pore of 1 mm, the 3D-MPAs allowed the microorganisms to colonize inside, improving anodic space utilization efficiency. Different carbonization temperature in tested range from 700 °C to 1000 °C regulated the micrometer-scale convex structures and surface roughness of 3D-MPAs, causing electrochemical performance changes. The 3D-MPA-900 obtained the largest electroactive surface area (102 ± 4.1 cm2) and smallest ohmic resistance (1.8 ± 0.09 Ω). Equipped with MES, 3D-MPA-900 reached the highest power density and current density (2590 ± 25 mW m-2 and 5.20 ± 0.07 A m-2). Among tested 3D-MPA, the excellent performance of 3D-MPA-900 might be attributed by its convex structures with suitable size and surface coverage. The surface roughness of 3D-MPA-900 enhanced the microorganism adherence, which then promoted EET on anode surface. Generally, phenolic-based 3D-MPA made of sacrificial-template method had controllable porous structure, large-scale fabrication availability, high chemical stability and excellent mechanical property, which could be promising for the commercial application of MES.
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Affiliation(s)
- Yaqian Gao
- School of Environmental Science and Engineering, Academy of Ecology and Environment, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Jianjun Huang
- School of Environmental Science and Engineering, Academy of Ecology and Environment, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Lijuan Zhang
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, China; SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, Guangzhou 510006, China
| | - Yujie Zhu
- School of Environmental Science and Engineering, Academy of Ecology and Environment, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Pinpin Yang
- School of Environmental Science and Engineering, Academy of Ecology and Environment, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Lefei Xue
- School of Environmental Science and Engineering, Academy of Ecology and Environment, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Naiyu Wang
- School of Environmental Science and Engineering, Academy of Ecology and Environment, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Weihua He
- School of Environmental Science and Engineering, Academy of Ecology and Environment, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China.
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Wu J, Liu R, Dong P, Li N, He W, Feng Y, Liu J. Enhanced electricity generation and storage by nitrogen-doped hierarchically porous carbon modification of the capacitive bioanode in microbial fuel cells. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159688. [PMID: 36302411 DOI: 10.1016/j.scitotenv.2022.159688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 10/20/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
Microbial fuel cells (MFCs) can potentially be utilized for power generation, but their low power density and low energy storage capabilities remain major bottlenecks for their large-scale development. In this research, a simplistic nitrogen-doped hierarchically porous carbon material (HPC-A) was developed through a one-step carbonization and activation process and was successfully hot-pressed on the carbon cloth (CC) substrate. This process fabricates capacitive bioanodes (HPC-A-CC) that can enhance electricity generation and storage in MFCs. The as-prepared HPC-A-CC anode delivered a power density of 2043.6 mW·m-2 and a cumulative total charge (Qm) of 426.4 ± 13.4C·m-2 at each cycle, which was 2.1 and 34.8 times higher than that of the plain CC anode, respectively. This was a result of the hierarchical and interconnected porous structure, improved hydrophilic surface, and increased number of active centers which host the bacteria for enhanced electron transfer. Electrochemical measurements indicated the superior electrochemical activity and capacitive behavior of the HPC-A-CC anode. Furthermore, biofilm analysis revealed that the HPC-A-CC biofilm exhibited higher cell viability and a more uniform spatial distribution. These findings not only demonstrate the potential of HPC-A-CC for power enhancement in MFCs but also provide a feasible solution to the problem of power generation and demand mismatch in MFC applications.
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Affiliation(s)
- Jingxuan Wu
- School of Environmental Science and Engineering, Academy of Environment and Ecology, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Ruijun Liu
- School of Environmental Science and Engineering, Academy of Environment and Ecology, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Pengfei Dong
- School of Environmental Science and Engineering, Academy of Environment and Ecology, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Nan Li
- School of Environmental Science and Engineering, Academy of Environment and Ecology, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Weihua He
- School of Environmental Science and Engineering, Academy of Environment and Ecology, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Yujie Feng
- School of Environmental Science and Engineering, Academy of Environment and Ecology, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Jia Liu
- School of Environmental Science and Engineering, Academy of Environment and Ecology, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China.
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Liang D, He W, Li C, Liu G, Li Z, Wang F, Yu Y, Feng Y. Electron-pool promotes interfacial electron transfer efficiency between pyrogenic carbon and anodic microbes. BIORESOURCE TECHNOLOGY 2022; 366:128177. [PMID: 36283670 DOI: 10.1016/j.biortech.2022.128177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/17/2022] [Accepted: 10/18/2022] [Indexed: 06/16/2023]
Abstract
Relying on surface functional groups and graphitized structure, pyrogenic carbon (PC) was reported to facilitate microbial extracellular electron transfer (EET), which plays a crucial role in diverse biogeochemical reactions. However, little is known about the role of electrical capacitance on EET between microbes and PCs. Here, PCs were obtained from fermented steam bread after carbonization at different temperatures from 700 °C to 1100 °C. PC-900 exhibited the lowest charge transfer resistance and highest electrical capacitance, ascribed to combined effects of graphitic structure and hierarchical porous structure. The interfacial EET was further investigated by enriching electroactive biofilms on PC surface. Faster interfacial EET was demonstrated in PC-900. Maximum power density was proportional to electrical capacitance rather than conductivity. PC-900 enriched the most Geobacter sp., which was positively correlated with electrical capacitance according to the distance-based redundancy analysis. Electrical capacitance was suggested to act as electron pool to facilitate interfacial EET efficiency.
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Affiliation(s)
- Dandan Liang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Weihua He
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Chao Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Guohong Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China.
| | - Zeng Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Fei Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Yanling Yu
- School of Chemistry & Chemical Engineering, Harbin Institute of Technology, Harbin 150080, China
| | - Yujie Feng
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China
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Boosting bioelectricity generation in microbial fuel cells via biomimetic Fe-N-S-C nanozymes. Biosens Bioelectron 2022; 220:114895. [DOI: 10.1016/j.bios.2022.114895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/04/2022] [Accepted: 11/06/2022] [Indexed: 11/09/2022]
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Tian Y, Li C, Liang D, Xie T, He W, Li D, Feng Y. Fungus-sourced filament-array anode facilitates Geobacter enrichment and promotes anodic bio-capacitance improvement for efficient power generation in microbial fuel cells. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:155926. [PMID: 35588840 DOI: 10.1016/j.scitotenv.2022.155926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 05/07/2022] [Accepted: 05/10/2022] [Indexed: 06/15/2023]
Abstract
Microbial fuel cells (MFC) are emerging as new generation eco-friendly technology for the superiorities of energy harvest and simultaneous wastewater treatment. However, the power generation performance was strongly restricted by the material/biofilm electron transfer rate. In this research, the fungus-sourced electrode with filament-array structure was firstly proposed and prepared by one-step carbonization method. After 2 h pyrolysis, the functional groups containing N and O elements highly remained in the as-prepared material, which was beneficial to the electron transfer for the current generation. The lowest electron transfer resistance was obtained at 2.2 Ω, which showed a great reduction that compared with graphite sheet anode. With filament-array structure, the lowest mass diffusion resistance was obtained at 26.9 Ω for anodic oxidation reaction, which also supported the highest current generation performance. In addition, the relative abundance of typical electrochemical bacterium Geobacter was highly improved to 45.5% with an extraordinary electroactive biofilm loading of about 1203 ± 256 μg cm-2. More importantly, the high biocatalytic activity biofilm supported a remarkably observed bio-capacitance of about 1.14 F in 3DFfv anode, which exhibited the highest power density in 3.5 ± 0.2 W m-2. In addition, the fungus-sourced material was one kind of economical and readily available material. Overall, this work provided one efficient strategy for electrode preparation and higher power generation in MFCs, which would reduce the capital cost and improve the efficiency in further applications of MFCs.
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Affiliation(s)
- Yan Tian
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Chao Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - DanDan Liang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Ting Xie
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Weihua He
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Da Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Yujie Feng
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090, China.
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