151
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Wang YZ, Shen Y, Gao L, Liao ZH, Sun JZ, Yong YC. Improving the extracellular electron transfer of Shewanella oneidensis MR-1 for enhanced bioelectricity production from biomass hydrolysate. RSC Adv 2017. [DOI: 10.1039/c7ra04106c] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Direct electricity production from biomass hydrolysate by microbial fuel cells (MFC) holds great promise for the development of the sustainable biomass industry.
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Affiliation(s)
- Yan-Zhai Wang
- Biofuels Institute
- School of the Environment
- Jiangsu University
- Zhenjiang 212013
- China
| | - Yu Shen
- College of Environment and Resources
- Chongqing Technology and Business University
- Chongqing Institute of Green and Intelligent Technology
- Chinese Academy of Sciences
- Chongqing 401122
| | - Lu Gao
- Biofuels Institute
- School of the Environment
- Jiangsu University
- Zhenjiang 212013
- China
| | - Zhi-Hong Liao
- Biofuels Institute
- School of the Environment
- Jiangsu University
- Zhenjiang 212013
- China
| | - Jian-Zhong Sun
- Biofuels Institute
- School of the Environment
- Jiangsu University
- Zhenjiang 212013
- China
| | - Yang-Chun Yong
- Biofuels Institute
- School of the Environment
- Jiangsu University
- Zhenjiang 212013
- China
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152
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Zhao CE, Gai P, Song R, Chen Y, Zhang J, Zhu JJ. Nanostructured material-based biofuel cells: recent advances and future prospects. Chem Soc Rev 2017; 46:1545-1564. [DOI: 10.1039/c6cs00044d] [Citation(s) in RCA: 205] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The review provides comprehensive discussions about electrode materials of BFCs and prospects of this technology for real-word applications.
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Affiliation(s)
- Cui-e Zhao
- State key Laboratory of Analytical Chemistry for Life Science
- Collaborative Innovation of Chemistry for Life Science
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Panpan Gai
- State key Laboratory of Analytical Chemistry for Life Science
- Collaborative Innovation of Chemistry for Life Science
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Rongbin Song
- State key Laboratory of Analytical Chemistry for Life Science
- Collaborative Innovation of Chemistry for Life Science
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Ying Chen
- State key Laboratory of Analytical Chemistry for Life Science
- Collaborative Innovation of Chemistry for Life Science
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Jianrong Zhang
- State key Laboratory of Analytical Chemistry for Life Science
- Collaborative Innovation of Chemistry for Life Science
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Jun-Jie Zhu
- State key Laboratory of Analytical Chemistry for Life Science
- Collaborative Innovation of Chemistry for Life Science
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
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153
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Li F, Li Y, Sun L, Li X, Yin C, An X, Chen X, Tian Y, Song H. Engineering Shewanella oneidensis enables xylose-fed microbial fuel cell. BIOTECHNOLOGY FOR BIOFUELS 2017; 10:196. [PMID: 28804512 PMCID: PMC5549365 DOI: 10.1186/s13068-017-0881-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 08/01/2017] [Indexed: 05/22/2023]
Abstract
BACKGROUND The microbial fuel cell (MFC) is a green and sustainable technology for electricity energy harvest from biomass, in which exoelectrogens use metabolism and extracellular electron transfer pathways for the conversion of chemical energy into electricity. However, Shewanella oneidensis MR-1, one of the most well-known exoelectrogens, could not use xylose (a key pentose derived from hydrolysis of lignocellulosic biomass) for cell growth and power generation, which limited greatly its practical applications. RESULTS Herein, to enable S. oneidensis to directly utilize xylose as the sole carbon source for bioelectricity production in MFCs, we used synthetic biology strategies to successfully construct four genetically engineered S. oneidensis (namely XE, GE, XS, and GS) by assembling one of the xylose transporters (from Candida intermedia and Clostridium acetobutylicum) with one of intracellular xylose metabolic pathways (the isomerase pathway from Escherichia coli and the oxidoreductase pathway from Scheffersomyces stipites), respectively. We found that among these engineered S. oneidensis strains, the strain GS (i.e. harbouring Gxf1 gene encoding the xylose facilitator from C. intermedi, and XYL1, XYL2, and XKS1 genes encoding the xylose oxidoreductase pathway from S. stipites) was able to generate the highest power density, enabling a maximum electricity power density of 2.1 ± 0.1 mW/m2. CONCLUSION To the best of our knowledge, this was the first report on the rationally designed Shewanella that could use xylose as the sole carbon source and electron donor to produce electricity. The synthetic biology strategies developed in this study could be further extended to rationally engineer other exoelectrogens for lignocellulosic biomass utilization to generate electricity power.
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Affiliation(s)
- Feng Li
- Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
- SynBio Research Platform, Collaborative Innovation Centre of Chemical Science and Engineering, Tianjin University, Tianjin, 300072 China
| | - Yuanxiu Li
- Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
- SynBio Research Platform, Collaborative Innovation Centre of Chemical Science and Engineering, Tianjin University, Tianjin, 300072 China
| | - Liming Sun
- Petrochemical Research Institute, PetroChina Company Limited, Beijing, 102206 People’s Republic of China
| | - Xiaofei Li
- Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
- SynBio Research Platform, Collaborative Innovation Centre of Chemical Science and Engineering, Tianjin University, Tianjin, 300072 China
| | - Changji Yin
- Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
- SynBio Research Platform, Collaborative Innovation Centre of Chemical Science and Engineering, Tianjin University, Tianjin, 300072 China
| | - Xingjuan An
- Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
- SynBio Research Platform, Collaborative Innovation Centre of Chemical Science and Engineering, Tianjin University, Tianjin, 300072 China
| | - Xiaoli Chen
- Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
- SynBio Research Platform, Collaborative Innovation Centre of Chemical Science and Engineering, Tianjin University, Tianjin, 300072 China
| | - Yao Tian
- Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
- SynBio Research Platform, Collaborative Innovation Centre of Chemical Science and Engineering, Tianjin University, Tianjin, 300072 China
| | - Hao Song
- Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
- SynBio Research Platform, Collaborative Innovation Centre of Chemical Science and Engineering, Tianjin University, Tianjin, 300072 China
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154
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Song RB, Zhao CE, Gai PP, Guo D, Jiang LP, Zhang Q, Zhang JR, Zhu JJ. Graphene/Fe3O4Nanocomposites as Efficient Anodes to Boost the Lifetime and Current Output of Microbial Fuel Cells. Chem Asian J 2016; 12:308-313. [DOI: 10.1002/asia.201601272] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 11/19/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Rong-Bin Song
- State Key Laboratory of Analytical Chemistry for Life and Collaborative Innovation Center of Chemistry for Life Science School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210093 P. R. China
- School of Materials Science and Engineering; Nanyang Technological University; Nanyang Avenue 639798 Singapore Singapore
| | - Cui-e Zhao
- Key Laboratory for Organic Electronics and Information Displays and Institute of Advanced Materials; Nanjing University of Posts & Telecommunications; Nanjing 210023 P. R. China
| | - Pan-Pan Gai
- State Key Laboratory of Analytical Chemistry for Life and Collaborative Innovation Center of Chemistry for Life Science School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210093 P. R. China
| | - Dan Guo
- State Key Laboratory of Analytical Chemistry for Life and Collaborative Innovation Center of Chemistry for Life Science School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210093 P. R. China
| | - Li-Ping Jiang
- State Key Laboratory of Analytical Chemistry for Life and Collaborative Innovation Center of Chemistry for Life Science School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210093 P. R. China
| | - Qichun Zhang
- School of Materials Science and Engineering; Nanyang Technological University; Nanyang Avenue 639798 Singapore Singapore
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Science; Nanyang Technological University; Nanyang Avenue 639798 Singapore Singapore
| | - Jian-Rong Zhang
- State Key Laboratory of Analytical Chemistry for Life and Collaborative Innovation Center of Chemistry for Life Science School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210093 P. R. China
- School of Chemistry and Life Science; Nanjing University Jinling College; Nanjing 210089 P. R. China
| | - Jun-Jie Zhu
- State Key Laboratory of Analytical Chemistry for Life and Collaborative Innovation Center of Chemistry for Life Science School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210093 P. R. China
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155
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Nanocomposites of graphene and graphene oxides: Synthesis, molecular functionalization and application in electrochemical sensors and biosensors. A review. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-2007-0] [Citation(s) in RCA: 181] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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156
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Si RW, Yang Y, Yu YY, Han S, Zhang CL, Sun DZ, Zhai DD, Liu X, Yong YC. Wiring Bacterial Electron Flow for Sensitive Whole-Cell Amperometric Detection of Riboflavin. Anal Chem 2016; 88:11222-11228. [PMID: 27750415 DOI: 10.1021/acs.analchem.6b03538] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A whole-cell bioelectrochemical biosensing system for amperometric detection of riboflavin was developed. A "bioelectrochemical wire" (BW) consisting of riboflavin and cytochrome C between Shewanella oneidensis MR-1 and electrode was characterized. Typically, a strong electrochemical response was observed when riboflavin (VB2) was added to reinforce this BW. Impressively, the electrochemical response of riboflavin with this BW was over 200 times higher than that without bacteria. Uniquely, this electron rewiring process enabled the development of a biosensing system for amperometric detection of riboflavin. Remarkably, this amperometric method showed high sensitivity (LOD = 2.2 nM, S/N = 3), wide linear range (5 nM ∼ 10 μM, 3 orders of magnitude), good selectivity, and high resistance to interferences. Additionally, the developed amperometric method featured good stability and reusability. It was further applied for accurate and reliable determination of riboflavin in real conditions including food, pharmaceutical, and clinical samples without pretreatment. Both the cost-effectiveness and robustness make this whole-cell amperometric system ideal for practical applications. This work demonstrated the power of bioelectrochemical signal amplification with exoelectrogen and also provided a new idea for development of versatile whole-cell amperometric biosensors.
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Affiliation(s)
- Rong-Wei Si
- Biofuels Institute and ‡School of the Environment, Jiangsu University , 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China
| | - Yuan Yang
- Biofuels Institute and ‡School of the Environment, Jiangsu University , 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China
| | - Yang-Yang Yu
- Biofuels Institute and ‡School of the Environment, Jiangsu University , 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China
| | - Song Han
- Biofuels Institute and ‡School of the Environment, Jiangsu University , 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China
| | - Chun-Lian Zhang
- Biofuels Institute and ‡School of the Environment, Jiangsu University , 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China
| | - De-Zhen Sun
- Biofuels Institute and ‡School of the Environment, Jiangsu University , 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China
| | - Dan-Dan Zhai
- Biofuels Institute and ‡School of the Environment, Jiangsu University , 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China
| | - Xiang Liu
- Biofuels Institute and ‡School of the Environment, Jiangsu University , 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China
| | - Yang-Chun Yong
- Biofuels Institute and ‡School of the Environment, Jiangsu University , 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China
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157
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Liu J, Zheng Y, Hong Z, Cai K, Zhao F, Han H. Microbial synthesis of highly dispersed PdAu alloy for enhanced electrocatalysis. SCIENCE ADVANCES 2016; 2:e1600858. [PMID: 27704047 PMCID: PMC5045266 DOI: 10.1126/sciadv.1600858] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 08/18/2016] [Indexed: 05/04/2023]
Abstract
Biosynthesis based on the reducing capacity of electrochemically active bacteria is frequently used in the reduction of metal ions into nanoparticles as an eco-friendly way to recycle metal resources. However, those bionanoparticles cannot be used directly as electrocatalysts because of the poor conductivity of cell substrates. This problem was solved by a hydrothermal reaction, which also contributes to the heteroatom doping and alloying between Pd and Au. With the protection of graphene, the aggregation of nanoparticles was successfully avoided, and the porous structure was maintained, resulting in better electrocatalytic activity and durability than commercial Pd/C under both alkaline (CH3CH2OH, 6.15-fold of mass activity) and acidic (HCOOH, 6.58-fold of mass activity) conditions. The strategy developed in this work opens up a horizon into designing electrocatalysts through fully utilizing the abundant resources in nature.
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Affiliation(s)
- Jiawei Liu
- State Key Laboratory of Agricultural Microbiology, College of Science, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yue Zheng
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Zilan Hong
- State Key Laboratory of Agricultural Microbiology, College of Science, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Kai Cai
- State Key Laboratory of Agricultural Microbiology, College of Science, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Feng Zhao
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- Corresponding author. (H.H.); (F.Z.)
| | - Heyou Han
- State Key Laboratory of Agricultural Microbiology, College of Science, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
- Corresponding author. (H.H.); (F.Z.)
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158
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Yang X, Ma X, Wang K, Wu D, Lei Z, Feng C. Eighteen-month assessment of 3D graphene oxide aerogel-modified 3D graphite fiber brush electrode as a high-performance microbial fuel cell anode. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.05.215] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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159
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Yuan Y, Guo T, Qiu X, Tang J, Huang Y, Zhuang L, Zhou S, Li Z, Guan BO, Zhang X, Albert J. Electrochemical Surface Plasmon Resonance Fiber-Optic Sensor: In Situ Detection of Electroactive Biofilms. Anal Chem 2016; 88:7609-16. [DOI: 10.1021/acs.analchem.6b01314] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yong Yuan
- Guangdong
Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China
| | - Tuan Guo
- Guangdong
Key Laboratory of Optical Fiber Sensing and Communications, Institute
of Photonics Technology, Jinan University, Guangzhou 510632, China
| | - Xuhui Qiu
- Guangdong
Key Laboratory of Optical Fiber Sensing and Communications, Institute
of Photonics Technology, Jinan University, Guangzhou 510632, China
| | - Jiahuan Tang
- Guangdong
Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China
| | - Yunyun Huang
- Guangdong
Key Laboratory of Optical Fiber Sensing and Communications, Institute
of Photonics Technology, Jinan University, Guangzhou 510632, China
| | - Li Zhuang
- Guangdong
Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China
| | - Shungui Zhou
- Guangdong
Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China
| | - Zhaohui Li
- Guangdong
Key Laboratory of Optical Fiber Sensing and Communications, Institute
of Photonics Technology, Jinan University, Guangzhou 510632, China
| | - Bai-Ou Guan
- Guangdong
Key Laboratory of Optical Fiber Sensing and Communications, Institute
of Photonics Technology, Jinan University, Guangzhou 510632, China
| | - Xuming Zhang
- Department
of Applied Physics, Hong Kong Polytechnic University, Hong Kong, People’s Republic of China
| | - Jacques Albert
- Department
of Electronics, Carleton University, Ottawa K1S5B6, Canada
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160
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Xu YS, Zheng T, Yong XY, Zhai DD, Si RW, Li B, Yu YY, Yong YC. Trace heavy metal ions promoted extracellular electron transfer and power generation by Shewanella in microbial fuel cells. BIORESOURCE TECHNOLOGY 2016; 211:542-547. [PMID: 27038263 DOI: 10.1016/j.biortech.2016.03.144] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 03/24/2016] [Accepted: 03/25/2016] [Indexed: 06/05/2023]
Abstract
Although microbial fuel cells (MFCs) is considered as one of the most promising technology for renewable energy harvesting, low power output still accounts one of the bottlenecks and limits its further development. In this work, it is found that Cu(2+) (0.1μgL(-1)-0.1mgL(-1)) or Cd(2+) (0.1μgL(-1)-1mgL(-1)) significantly improve the electricity generation in MFCs. The maximum power output achieved with trace level of Cu(2+) (∼6nM) or Cd(2+) (∼5nM) is 1.3 times and 1.6 times higher than that of the control, respectively. Further analysis verifies that addition of Cu(2+) or Cd(2+) effectively improves riboflavin production and bacteria attachment on the electrode, which enhances bacterial extracellular electron transfer (EET) in MFCs. These results unveil the mechanism for power output enhancement by Cu(2+) or Cd(2+) addition, and suggest that metal ion addition should be a promising strategy to enhance EET as well as power generation of MFCs.
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Affiliation(s)
- Yu-Shang Xu
- Biofuels Institute, School of the Environment, Jiangsu University, Zhenjiang 212013, China; College of Biotechnology and Pharmaceutical Engineering and Bioenergy Research Institute, Nanjing TECH University, Nanjing 210095, China
| | - Tao Zheng
- Guangzhou Institute of Energy Conversion, Key Laboratory of Renewable Energy, Chinese Academy of Science, Guangzhou, Guangdong 510640, China
| | - Xiao-Yu Yong
- College of Biotechnology and Pharmaceutical Engineering and Bioenergy Research Institute, Nanjing TECH University, Nanjing 210095, China
| | - Dan-Dan Zhai
- Biofuels Institute, School of the Environment, Jiangsu University, Zhenjiang 212013, China
| | - Rong-Wei Si
- Biofuels Institute, School of the Environment, Jiangsu University, Zhenjiang 212013, China
| | - Bing Li
- Biofuels Institute, School of the Environment, Jiangsu University, Zhenjiang 212013, China
| | - Yang-Yang Yu
- Biofuels Institute, School of the Environment, Jiangsu University, Zhenjiang 212013, China
| | - Yang-Chun Yong
- Biofuels Institute, School of the Environment, Jiangsu University, Zhenjiang 212013, China.
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161
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Song RB, Zhao CE, Jiang LP, Abdel-Halim ES, Zhang JR, Zhu JJ. Bacteria-Affinity 3D Macroporous Graphene/MWCNTs/Fe3O4 Foams for High-Performance Microbial Fuel Cells. ACS APPLIED MATERIALS & INTERFACES 2016; 8:16170-16177. [PMID: 27266894 DOI: 10.1021/acsami.6b03425] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Promoting the performance of microbial fuel cells (MFCs) relies heavily on the structure design and composition tailoring of electrode materials. In this work, three-dimensional (3D) macroporous graphene foams incorporated with intercalated spacer of multiwalled carbon nanotubes (MWCNTs) and bacterial anchor of Fe3O4 nanospheres (named as G/MWCNTs/Fe3O4 foams) were first synthesized and used as anodes for Shewanella-inoculated microbial fuel cells (MFCs). Thanks to the macroporous structure of 3D graphene foams, the expanded electrode surface by MWCNTs spacing, as well as the high affinity of Fe3O4 nanospheres toward Shewanella oneidensis MR-1, the anode exhibited high bacterial loading capability. In addition to spacing graphene nanosheets for accommodating bacterial cells, MWCNTs paved a smoother way for electron transport in the electrode substrate of MFCs. Meanwhile, the embedded bioaffinity Fe3O4 nanospheres capable of preserving the bacterial metabolic activity provided guarantee for the long-term durability of the MFCs. With these merits, the constructed MFC possessed significantly higher power output and stronger stability than that with conventional graphite rod anode.
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Affiliation(s)
- Rong-Bin Song
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, P. R. China
| | - Cui-E Zhao
- Key Laboratory for Organic Electronics and Information Displays and Institute of Advanced Materials, Nanjing University of Posts & Telecommunications , Nanjing 210023, P. R. China
| | - Li-Ping Jiang
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, P. R. China
| | - Essam Sayed Abdel-Halim
- Chemistry Department, College of Science, King Saud University , Riyadh 11451, P. O. Box2455, Kingdom of Saudi Arabia
| | - Jian-Rong Zhang
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, P. R. China
- School of Chemistry and Life Science, Nanjing University Jinling College , Nanjing 210089, P. R. China
| | - Jun-Jie Zhu
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, P. R. China
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162
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Xie J, Zhao CE, Lin ZQ, Gu PY, Zhang Q. Nanostructured Conjugated Polymers for Energy-Related Applications beyond Solar Cells. Chem Asian J 2016; 11:1489-511. [DOI: 10.1002/asia.201600293] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Indexed: 12/14/2022]
Affiliation(s)
- Jian Xie
- School of Materials Science and Engineering; Nanyang Technological University (Singapore); 639798 Singapore Singapore
| | - Cui-e Zhao
- School of Materials Science and Engineering; Nanyang Technological University (Singapore); 639798 Singapore Singapore
| | - Zong-qiong Lin
- School of Materials Science and Engineering; Nanyang Technological University (Singapore); 639798 Singapore Singapore
| | - Pei-yang Gu
- School of Materials Science and Engineering; Nanyang Technological University (Singapore); 639798 Singapore Singapore
| | - Qichun Zhang
- School of Materials Science and Engineering; Nanyang Technological University (Singapore); 639798 Singapore Singapore
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematics Science; Nanyang Technological University (Singapore); 637371 Singapore Singapore
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163
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Hui J, Jiang X, Xie H, Chen D, Shen J, Sun X, Han W, Li J, Wang L. Laccase-catalyzed electrochemical fabrication of polyaniline/graphene oxide composite onto graphite felt electrode and its application in bioelectrochemical system. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2015.12.119] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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164
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Wang W, You S, Gong X, Qi D, Chandran BK, Bi L, Cui F, Chen X. Bioinspired Nanosucker Array for Enhancing Bioelectricity Generation in Microbial Fuel Cells. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:270-275. [PMID: 26550771 DOI: 10.1002/adma.201503609] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Revised: 09/13/2015] [Indexed: 06/05/2023]
Abstract
A bioinspired active anode with a suction effect is demonstrated for microbial fuel cells by constructing polypyrrole (PPy) nanotubular arrays on carbon textiles. The oxygen in the inner space of the nanosucker can be depleted by micro-organisms with the capability of facul-tative respiration, forming a vacuum, which then activates the electrode to draw the microorganism by suction and thus improve the bioelectricity generation.
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Affiliation(s)
- Wei Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, P. R. China
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore
| | - Shijie You
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, P. R. China
| | - Xiaobo Gong
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, P. R. China
| | - Dianpeng Qi
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore
| | - Bevita K Chandran
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore
| | - Lanpo Bi
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, P. R. China
| | - Fuyi Cui
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, P. R. China
| | - Xiaodong Chen
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore
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165
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Zhai DD, Li B, Sun JZ, Sun DZ, Si RW, Yong YC. Enhanced power production from microbial fuel cells with high cell density culture. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2016; 73:2176-81. [PMID: 27148719 DOI: 10.2166/wst.2016.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Improvement of power production in a microbial fuel cell (MFC) with a high cell density culture strategy was developed. By using high cell density culture, the voltage output and power density output of the MFC were enhanced about 0.6 and 1.6 times compared to the control, respectively. Further analysis showed that riboflavin concentration in the MFC was dramatically increased from 0.1 mg/L to 1.2 mg/L by high cell density culture. Moreover, the biofilm formation on the anode surface was significantly enhanced by this new strategy. The increased accumulation of electron shuttle (riboflavin) as well as enhanced biofilm formation contributed to the improvement in anodic electrochemical activity and these factors were the underlying mechanism for MFC performance improvement by high cell density culture. This work demonstrated that high cell density culture would be a simple and practical strategy for MFC manipulation.
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Affiliation(s)
- Dan-Dan Zhai
- Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China E-mail: ; College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, Henan Province, China
| | - Bing Li
- Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China E-mail:
| | - Jian-Zhong Sun
- Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China E-mail:
| | - De-Zhen Sun
- Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China E-mail:
| | - Rong-Wei Si
- Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China E-mail:
| | - Yang-Chun Yong
- Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China E-mail:
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166
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Zhao C, Ding C, Lv M, Wang Y, Jiang L, Liu H. Hydrophilicity boosted extracellular electron transfer in Shewanella loihica PV-4. RSC Adv 2016. [DOI: 10.1039/c5ra24369f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A superhydrophilic electrode enables the drastically boosted bacterial EET activity ofShewanella loihicaPV-4. It is proposed that a hydrophilic electrode favors the reduced state of OMCs, and consequently both the EET activity and cell proliferation are highly facilitated.
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Affiliation(s)
- Chen Zhao
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Chunmei Ding
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Meiling Lv
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Yuan Wang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Lei Jiang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Huan Liu
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
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167
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Kalathil S, Pant D. Nanotechnology to rescue bacterial bidirectional extracellular electron transfer in bioelectrochemical systems. RSC Adv 2016. [DOI: 10.1039/c6ra04734c] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Advanced nanostructured electrode materials largely improve the bacterial bidirectional extracellular electron transfer in bioelectrochemical systems.
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Affiliation(s)
- Shafeer Kalathil
- Division of Biological and Environmental Science & Engineering
- King Abdullah University of Science and Technology
- Thuwal 23955-6900
- Saudi Arabia
| | - Deepak Pant
- Separation and Conversion Technology
- VITO – Flemish Institute for Technological Research
- 2400 Mol
- Belgium
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168
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Qiu HJ, Guan Y, Luo P, Wang Y. Recent advance in fabricating monolithic 3D porous graphene and their applications in biosensing and biofuel cells. Biosens Bioelectron 2015; 89:85-95. [PMID: 26711357 DOI: 10.1016/j.bios.2015.12.029] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Revised: 12/07/2015] [Accepted: 12/14/2015] [Indexed: 11/18/2022]
Abstract
Graphene shows great potential in biosensing and bioelectronics. To facilitate graphene's applications and enhance its performance, recently, three-dimensional (3D) graphene-based materials especially free-standing porous graphene with tunable pore size and void space, have attracted increasing attention for bio-related applications owing to their special features. 3D graphene usually shows the following merits such as an interconnected porous network, a high electronic conductivity, a large active surface area, good chemical/thermal stability and can be more easily handled compared with dispersed graphene sheets. With modified surface properties, graphene can also be bio-friendly. These properties make 3D graphene a perfect candidate as high-performance electrode materials in bioelectronics devices. In this review, we discuss recent advance in fabricating monolithic 3D graphene and their applications in biosensing and biofuel cells.
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Affiliation(s)
- Hua-Jun Qiu
- The State Key Laboratory of Mechanical Transmissions and School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Yongxin Guan
- The State Key Laboratory of Mechanical Transmissions and School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Pan Luo
- The State Key Laboratory of Mechanical Transmissions and School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Yu Wang
- The State Key Laboratory of Mechanical Transmissions and School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
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169
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Xie Z, Dai J. Meeting report on Synthetic Biology Young Scholar Forum. QUANTITATIVE BIOLOGY 2015. [DOI: 10.1007/s40484-015-0053-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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170
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Yong YC, Wu XY, Sun JZ, Cao YX, Song H. Engineering quorum sensing signaling of Pseudomonas for enhanced wastewater treatment and electricity harvest: A review. CHEMOSPHERE 2015; 140:18-25. [PMID: 25455678 DOI: 10.1016/j.chemosphere.2014.10.020] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Revised: 07/13/2014] [Accepted: 10/05/2014] [Indexed: 06/04/2023]
Abstract
Cell-cell communication that enables synchronized population behaviors in microbial communities dictates various biological processes. It is of great interest to unveil the underlying mechanisms of fine-tuning cell-cell communication to achieve environmental and energy applications. Pseudomonas is a ubiquitous microbe in environments that had wide applications in bioremediation and bioenergy generation. The quorum sensing (QS, a generic cell-cell communication mechanism) systems of Pseudomonas underlie the aromatics biodegradation, denitrification and electricity harvest. Here, we reviewed the recent progresses of the genetic strategies in engineering QS circuits to improve efficiency of wastewater treatment and the performance of microbial fuel cells.
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Affiliation(s)
- Yang-Chun Yong
- Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China.
| | - Xiang-Yang Wu
- Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China
| | - Jian-Zhong Sun
- Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China
| | - Ying-Xiu Cao
- Key Laboratory of Systems Bioengineering (Ministry of Education), SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China; School of Chemical & Biomedical Engineering, and Singapore Centre on Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, Singapore 637457, Singapore
| | - Hao Song
- Key Laboratory of Systems Bioengineering (Ministry of Education), SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China; School of Chemical & Biomedical Engineering, and Singapore Centre on Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, Singapore 637457, Singapore.
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171
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Zheng T, Xu YS, Yong XY, Li B, Yin D, Cheng QW, Yuan HR, Yong YC. Endogenously enhanced biosurfactant production promotes electricity generation from microbial fuel cells. BIORESOURCE TECHNOLOGY 2015; 197:416-421. [PMID: 26356112 DOI: 10.1016/j.biortech.2015.08.136] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 08/12/2015] [Accepted: 08/15/2015] [Indexed: 06/05/2023]
Abstract
Microbial fuel cell (MFC) is considered as a promising green energy source and energy-saving pollutants treatment technology as it integrates pollutant biodegradation with energy extraction. In this work, a facile approach to enhance endogenous biosurfactant production was developed to improve the electron transfer rate and power output of MFC. By overexpression of rhlA, the key gene responsible for rhamnolipids synthesis, over-production of self-synthesized rhamnolipids from Pseudomonas aeruginosa PAO1 was achieved. Strikingly, the increased rhamnolipids production by rhlA overexpression significantly promoted the extracellular electron transfer of P. aeruginosa by enhancing electron shuttle (pyocyanin) production and increasing bacteria attachment on the anode. As a result, the strain with endogenously enhanced rhamnolipids production delivered 2.5 times higher power density output than that of the parent strain. This work substantiated that the enhancement on endogenous biosurfactant production could be a promising approach for improvement on the electricity output of MFC.
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Affiliation(s)
- Tao Zheng
- College of Biotechnology and Pharmaceutical Engineering, and Bioenergy Research Institute, Nanjing Tech University, Nanjing 210095, Jiangsu Province, China; Guangzhou Institute of Energy Conversion, Key Laboratory of Renewable Energy, Chinese Academy of Science, Guangzhou, Guangdong 510640, China
| | - Yu-Shang Xu
- Biofuels Institute, School of the Environment, Jiangsu University, Zhenjiang 212013, Jiangsu Province, China; College of Biotechnology and Pharmaceutical Engineering, and Bioenergy Research Institute, Nanjing Tech University, Nanjing 210095, Jiangsu Province, China
| | - Xiao-Yu Yong
- College of Biotechnology and Pharmaceutical Engineering, and Bioenergy Research Institute, Nanjing Tech University, Nanjing 210095, Jiangsu Province, China
| | - Bing Li
- Biofuels Institute, School of the Environment, Jiangsu University, Zhenjiang 212013, Jiangsu Province, China
| | - Di Yin
- Biofuels Institute, School of the Environment, Jiangsu University, Zhenjiang 212013, Jiangsu Province, China
| | - Qian-Wen Cheng
- Biofuels Institute, School of the Environment, Jiangsu University, Zhenjiang 212013, Jiangsu Province, China
| | - Hao-Ran Yuan
- Guangzhou Institute of Energy Conversion, Key Laboratory of Renewable Energy, Chinese Academy of Science, Guangzhou, Guangdong 510640, China
| | - Yang-Chun Yong
- Biofuels Institute, School of the Environment, Jiangsu University, Zhenjiang 212013, Jiangsu Province, China.
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172
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Zhang X, Liu H, Wang J, Ren G, Xie B, Liu H, Zhu Y, Jiang L. Facilitated extracellular electron transfer of Shewanella loihica PV-4 by antimony-doped tin oxide nanoparticles as active microelectrodes. NANOSCALE 2015; 7:18763-18769. [PMID: 26505239 DOI: 10.1039/c5nr04765j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Dissimilatory metal reducing bacteria are capable of extracellular electron transfer (EET) to insoluble metal oxides as external electron acceptors for their anaerobic respiration, which is recognized as an important energy-conversion process in natural and engineered environments, such as in mineral cycling, bioremediation, and microbial fuel/electrolysis cells. However, the low EET efficiency remains one of the major bottlenecks for its practical application. We report firstly that the microbial current generated by Shewanella loihica PV-4 (S. loihica PV-4) could be greatly improved that is up to ca. 115 fold, by adding antimony-doped tin oxide (ATO) nanoparticles in the electrochemical reactor. The results demonstrate that the biocompatible, electrically conductive ATO nanoparticles acted as active microelectrodes could facilitate the formation of a cells/ATO composite biofilm and the reduction of the outer membrane c-type cytochromes (OM c-Cyts) that are beneficial for the electron transfer from cells to electrode. Meanwhile, a synergistic effect between the participation of OM c-Cyts and the accelerated EET mediated by cell-secreted flavins may play an important role for the enhanced current generation in the presence of ATO nanoparticles. Moreover, it is worth noting that the TCA cycle in S. loihica PV-4 cells is activated by adding ATO nanoparticles, even if the potential is poised at +0.2 V, thereby also improving the EET process. The results presented here may provide a simple and effective strategy to boost the EET of S. loihica PV-4 cells, which is conducive to providing potential applications in bioelectrochemical systems.
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Affiliation(s)
- Xiaojian Zhang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Chemistry and Environment, Beihang University, Beijing 100191, PR China.
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173
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Anode decoration with biogenic Pd nanoparticles improved power generation in microbial fuel cells. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.09.157] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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174
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Yu Y, Wu Y, Cao B, Gao YG, Yan X. Adjustable bidirectional extracellular electron transfer between Comamonas testosteroni biofilms and electrode via distinct electron mediators. Electrochem commun 2015. [DOI: 10.1016/j.elecom.2015.07.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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175
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Tang J, Chen S, Yuan Y, Cai X, Zhou S. In situ formation of graphene layers on graphite surfaces for efficient anodes of microbial fuel cells. Biosens Bioelectron 2015; 71:387-395. [DOI: 10.1016/j.bios.2015.04.074] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Revised: 04/22/2015] [Accepted: 04/23/2015] [Indexed: 11/25/2022]
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176
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Liao ZH, Sun JZ, Sun DZ, Si RW, Yong YC. Enhancement of power production with tartaric acid doped polyaniline nanowire network modified anode in microbial fuel cells. BIORESOURCE TECHNOLOGY 2015; 192:831-834. [PMID: 26094048 DOI: 10.1016/j.biortech.2015.05.105] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 05/26/2015] [Accepted: 05/27/2015] [Indexed: 06/04/2023]
Abstract
The feasibility to use tartaric acid doped PANI for MFC anode modification was determined. Uniform PANI nanowires doped with tartaric acid were synthesized and formed mesoporous networks on the carbon cloth surface. By using this tartaric acid doped PANI modified carbon cloth (PANI-TA) as the anode, the voltage output (435 ± 15 mV) and power output (490 ± 12 mW/m(2)) of MFC were enhanced by 1.6 times and 4.1 times compared to that of MFC with plain carbon cloth anode, respectively. Strikingly, the performance of PANI-TA MFC was superior to that of the MFCs with inorganic acids doped PNAI modified anode. These results substantiated that tartaric acid is a promising PANI dopant for MFC anode modification, and provided new opportunity for MFC performance improvement.
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Affiliation(s)
- Zhi-Hong Liao
- Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China
| | - Jian-Zhong Sun
- Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China
| | - De-Zhen Sun
- Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China
| | - Rong-Wei Si
- Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China
| | - Yang-Chun Yong
- Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China.
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177
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Yuan Y, Li L, Zhou S. Axial Ligation of Heme in c-Type Cytochromes of LivingShewanella oneidensis: A New Insight into Enhanced Extracellular Electron Transfer. ChemElectroChem 2015. [DOI: 10.1002/celc.201500234] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yong Yuan
- Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control; Guangdong Institute of Eco-Environmental and Soil Sciences; Guangzhou 510650 China
| | - Laicai Li
- College of Chemistry and Material Science; Sichuan Normal University; Chengdu 610066 China
| | - Shungui Zhou
- Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control; Guangdong Institute of Eco-Environmental and Soil Sciences; Guangzhou 510650 China
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178
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Zhao CE, Chen J, Ding Y, Wang VB, Bao B, Kjelleberg S, Cao B, Loo SCJ, Wang L, Huang W, Zhang Q. Chemically Functionalized Conjugated Oligoelectrolyte Nanoparticles for Enhancement of Current Generation in Microbial Fuel Cells. ACS APPLIED MATERIALS & INTERFACES 2015; 7:14501-14505. [PMID: 26079170 DOI: 10.1021/acsami.5b03990] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Water-soluble conjugated oligoelectrolyte nanoparticles (COE NPs), consisting of a cage-like polyhedral oligomeric silsesquioxanes (POSS) core equipped at each end with pendant groups (oligo(p-phenylenevinylene) electrolyte, OPVE), have been designed and demonstrated as an efficient strategy in increasing the current generation in Escherichia coli microbial fuel cells (MFCs). The as-prepared COE NPs take advantage of the structure of POSS and the optical properties of the pendant groups, OPVE. Confocal laser scanning microscopy showed strong photoluminescence of the stained cells, indicating spontaneous accumulation of COE NPs within cell membranes. Moreover, the electrochemical performance of the COE NPs is superior to that of an established membrane intercommunicating COE, DSSN+ in increasing current generation, suggesting that these COE NPs thus hold great potential to boost the performance of MFCs.
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Affiliation(s)
- Cui-e Zhao
- †School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Jia Chen
- †School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Yuanzhao Ding
- §Singapore Centre on Environmental Life Sciences Engineering, Nanyang Technological University, Singapore 637551, Singapore
| | - Victor Bochuan Wang
- †School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
- §Singapore Centre on Environmental Life Sciences Engineering, Nanyang Technological University, Singapore 637551, Singapore
| | | | - Staffan Kjelleberg
- §Singapore Centre on Environmental Life Sciences Engineering, Nanyang Technological University, Singapore 637551, Singapore
- ∥School of Biotechnology and Biomolecular Sciences and Centre for Marine Bio-innovation, The University of New South Wales, Sydney New South Wales 2052, Australia
| | - Bin Cao
- §Singapore Centre on Environmental Life Sciences Engineering, Nanyang Technological University, Singapore 637551, Singapore
- ⊥School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 637551, Singapore
| | - Say Chye Joachim Loo
- †School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
- §Singapore Centre on Environmental Life Sciences Engineering, Nanyang Technological University, Singapore 637551, Singapore
| | | | | | - Qichun Zhang
- †School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
- ∇Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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179
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Zhao CE, Wu J, Kjelleberg S, Loo JSC, Zhang Q. Employing a Flexible and Low-Cost Polypyrrole Nanotube Membrane as an Anode to Enhance Current Generation in Microbial Fuel Cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:3440-3443. [PMID: 25828694 DOI: 10.1002/smll.201403328] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Revised: 02/23/2015] [Indexed: 06/04/2023]
Abstract
The flexible and low-cost polypyrrole nanotube membrane is demonstrated as a promising anode in microbial fuel cells, which significantly enhances the extracellular electron transfer between Shewanella oneidensis MR-1 and the electrode, owing to the large active surface area and high electrical conductivity.
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Affiliation(s)
- Cui-e Zhao
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore
| | - Jiansheng Wu
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore
| | - Staffan Kjelleberg
- Singapore Centre on Environment Life Sciences Engineering, Nanyang Technological University, 60 Nanyang Drive, 637551, Singapore
- School of Biotechnology and Biomolecular Sciences and Centre for Marine Bio-innovation, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Joachim Say Chey Loo
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore
- Singapore Centre on Environment Life Sciences Engineering, Nanyang Technological University, 60 Nanyang Drive, 637551, Singapore
| | - Qichun Zhang
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
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180
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Gong XB, You SJ, Yuan Y, Zhang JN, Sun K, Ren NQ. Three-Dimensional Pseudocapacitive Interface for Enhanced Power Production in a Microbial Fuel Cell. ChemElectroChem 2015. [DOI: 10.1002/celc.201500174] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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181
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Si RW, Zhai DD, Liao ZH, Gao L, Yong YC. A whole-cell electrochemical biosensing system based on bacterial inward electron flow for fumarate quantification. Biosens Bioelectron 2015; 68:34-40. [DOI: 10.1016/j.bios.2014.12.035] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 12/08/2014] [Accepted: 12/15/2014] [Indexed: 10/24/2022]
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182
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Yuan H, He Z. Graphene-modified electrodes for enhancing the performance of microbial fuel cells. NANOSCALE 2015; 7:7022-7029. [PMID: 25465393 DOI: 10.1039/c4nr05637j] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Graphene is an emerging material with superior physical and chemical properties, which can benefit the development of microbial fuel cells (MFC) in several aspects. Graphene-based anodes can enhance MFC performance with increased electron transfer efficiency, higher specific surface area and more active microbe-electrode-electrolyte interaction. For cathodic processes, oxygen reduction reaction is effectively catalyzed by graphene-based materials because of a favorable pathway and an increase in active sites and conductivity. Despite challenges, such as complexity in synthesis and property degeneration, graphene-based electrodes will be promising for developing MFCs and other bioelectrochemical systems to achieve sustainable water/wastewater treatment and bioenergy production.
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Affiliation(s)
- Heyang Yuan
- Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA.
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183
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Tremblay PL, Zhang T. Electrifying microbes for the production of chemicals. Front Microbiol 2015; 6:201. [PMID: 25814988 PMCID: PMC4356085 DOI: 10.3389/fmicb.2015.00201] [Citation(s) in RCA: 118] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 02/24/2015] [Indexed: 01/06/2023] Open
Abstract
Powering microbes with electrical energy to produce valuable chemicals such as biofuels has recently gained traction as a biosustainable strategy to reduce our dependence on oil. Microbial electrosynthesis (MES) is one of the bioelectrochemical approaches developed in the last decade that could have critical impact on the current methods of chemical synthesis. MES is a process in which electroautotrophic microbes use electrical current as electron source to reduce CO2 to multicarbon organics. Electricity necessary for MES can be harvested from renewable resources such as solar energy, wind turbine, or wastewater treatment processes. The net outcome is that renewable energy is stored in the covalent bonds of organic compounds synthesized from greenhouse gas. This review will discuss the future of MES and the challenges that lie ahead for its development into a mature technology.
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Affiliation(s)
- Pier-Luc Tremblay
- Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Hørsholm Denmark
| | - Tian Zhang
- Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Hørsholm Denmark
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184
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Song Z, Wang X, Zhu G, Nian Q, Zhou H, Yang D, Qin C, Tang R. Virus capture and destruction by label-free graphene oxide for detection and disinfection applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:1171-6. [PMID: 25285820 DOI: 10.1002/smll.201401706] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 08/18/2014] [Indexed: 05/20/2023]
Abstract
Graphene oxide (GO) can efficiently capture viruses, destroy their surface proteins, and extract viral RNA in an aqueous environment by using the superficial bioreduction of GO. It follows from these phenomena that GO is an excellent nanomaterial for the high-throughput detection and disinfection of viruses, demonstrating its great potential for the prevention of environmental infections.
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Affiliation(s)
- Zhiyong Song
- Center for Biomaterials and Bioparthways, Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China
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185
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Zhao CE, Wu J, Ding Y, Wang VB, Zhang Y, Kjelleberg S, Loo JSC, Cao B, Zhang Q. Hybrid Conducting Biofilm with Built-in Bacteria for High-Performance Microbial Fuel Cells. ChemElectroChem 2015. [DOI: 10.1002/celc.201402458] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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186
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Lu Z, Girguis P, Liang P, Shi H, Huang G, Cai L, Zhang L. Biological capacitance studies of anodes in microbial fuel cells using electrochemical impedance spectroscopy. Bioprocess Biosyst Eng 2015; 38:1325-33. [PMID: 25656699 DOI: 10.1007/s00449-015-1373-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 01/29/2015] [Indexed: 01/28/2023]
Abstract
It is known that cell potential increases while anode resistance decreases during the start-up of microbial fuel cells (MFCs). Biological capacitance, defined as the apparent capacitance attributed to biological activity including biofilm production, plays a role in this phenomenon. In this research, electrochemical impedance spectroscopy was employed to study anode capacitance and resistance during the start-up period of MFCs so that the role of biological capacitance was revealed in electricity generation by MFCs. It was observed that the anode capacitance ranged from 3.29 to 120 mF which increased by 16.8% to 18-20 times over 10-12 days. Notably, lowering the temperature and arresting biological activity via fixation by 4% para formaldehyde resulted in the decrease of biological capacitance by 16.9 and 62.6%, indicating a negative correlation between anode capacitance and anode resistance of MFCs. Thus, biological capacitance of anode should play an important role in power generation by MFCs. We suggest that MFCs are not only biological reactors and/or electrochemical cells, but also biological capacitors, extending the vision on mechanism exploration of electron transfer, reactor structure design and electrode materials development of MFCs.
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Affiliation(s)
- Zhihao Lu
- State Environmental Protection Key Laboratory of Environmental Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
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187
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Sun JZ, Peter Kingori G, Si RW, Zhai DD, Liao ZH, Sun DZ, Zheng T, Yong YC. Microbial fuel cell-based biosensors for environmental monitoring: a review. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2015; 71:801-9. [PMID: 25812087 DOI: 10.2166/wst.2015.035] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The microbial fuel cell (MFC) is an innovative technology that was initially designed to harness energy from organic waste using microorganisms. It is striking how many promising applications beyond energy production have been explored in recent decades. In particular, MFC-based biosensors are considered to be the next generation biosensing technology for environmental monitoring. This review describes recent advances in this emerging technology of MFC-based biosensors, with a special emphasis on monitoring of biochemical oxygen demand and toxicity in the environment. The progress confirms that MFC-based biosensors could be used as self-powered portable biosensing devices with great potential in long-term and remote environmental monitoring.
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Affiliation(s)
- Jian-Zhong Sun
- School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China E-mail:
| | - Gakai Peter Kingori
- School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China E-mail: ; School of Environmental Studies, Kenyatta University, P.O. Box 43844, Nairobi, Kenya
| | - Rong-Wei Si
- School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China E-mail:
| | - Dan-Dan Zhai
- School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China E-mail: ; College of Bioengineering, Henan University of Technology, Henan 450001, China
| | - Zhi-Hong Liao
- School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China E-mail:
| | - De-Zhen Sun
- School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China E-mail:
| | - Tao Zheng
- College of Biotechnology & Pharmaceutical Engineering, Nanjing Tech University, No. 5 XinMofan Road, Nanjing 210009, China
| | - Yang-Chun Yong
- School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China E-mail:
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188
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Ding CM, Lv ML, Zhu Y, Jiang L, Liu H. Wettability-Regulated Extracellular Electron Transfer from the Living Organism ofShewanella loihicaPV-4. Angew Chem Int Ed Engl 2014; 54:1446-51. [DOI: 10.1002/anie.201409163] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 10/27/2014] [Indexed: 12/11/2022]
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189
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Ding CM, Lv ML, Zhu Y, Jiang L, Liu H. Wettability-Regulated Extracellular Electron Transfer from the Living Organism ofShewanella loihicaPV-4. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409163] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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190
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Jiang X, Hu J, Lieber AM, Jackan CS, Biffinger JC, Fitzgerald LA, Ringeisen BR, Lieber CM. Nanoparticle facilitated extracellular electron transfer in microbial fuel cells. NANO LETTERS 2014; 14:6737-6742. [PMID: 25310721 DOI: 10.1021/nl503668q] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Microbial fuel cells (MFCs) have been the focus of substantial research interest due to their potential for long-term, renewable electrical power generation via the metabolism of a broad spectrum of organic substrates, although the low power densities have limited their applications to date. Here, we demonstrate the potential to improve the power extraction by exploiting biogenic inorganic nanoparticles to facilitate extracellular electron transfer in MFCs. Simultaneous short-circuit current recording and optical imaging on a nanotechnology-enabled platform showed substantial current increase from Shewanella PV-4 after the formation of cell/iron sulfide nanoparticle aggregates. Detailed characterization of the structure and composition of the cell/nanoparticle interface revealed crystalline iron sulfide nanoparticles in intimate contact with and uniformly coating the cell membrane. In addition, studies designed to address the fundamental mechanisms of charge transport in this hybrid system showed that charge transport only occurred in the presence of live Shewanella, and moreover demonstrated that the enhanced current output can be attributed to improved electron transfer at cell/electrode interface and through the cellular-networks. Our approach of interconnecting and electrically contacting bacterial cells through biogenic nanoparticles represents a unique and promising direction in MFC research and has the potential to not only advance our fundamental knowledge about electron transfer processes in these biological systems but also overcome a key limitation in MFCs by constructing an electrically connected, three-dimensional cell network from the bottom-up.
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Affiliation(s)
- Xiaocheng Jiang
- Department of Chemistry and Chemical Biology and ‡Division of Engineering and Applied Sciences, Harvard University , Cambridge, Massachusetts 02138, United States
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191
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Shen HB, Yong XY, Chen YL, Liao ZH, Si RW, Zhou J, Wang SY, Yong YC, OuYang PK, Zheng T. Enhanced bioelectricity generation by improving pyocyanin production and membrane permeability through sophorolipid addition in Pseudomonas aeruginosa-inoculated microbial fuel cells. BIORESOURCE TECHNOLOGY 2014; 167:490-494. [PMID: 25011080 DOI: 10.1016/j.biortech.2014.05.093] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2014] [Revised: 05/23/2014] [Accepted: 05/24/2014] [Indexed: 06/03/2023]
Abstract
Improvement on electron shuttle-mediated extracellular electron transfer (EET) is of great potential to enhance the power output of MFCs. In this study, sophorolipid was added to enhance the performance of Pseudomonas aeruginosa-inoculated MFC by improving the electron shuttle-mediated EET. Upon sophorolipid addition, the current density and power density increased ∼ 1.7 times and ∼ 2.6 times, respectively. In accordance, significant enhancement on pyocyanin production (the electron shuttle) and membrane permeability were observed. Furthermore, the conditions for sophorolipid addition were optimized to achieve maximum pyocyanin production (14.47 ± 0.23 μg/mL), and 4 times higher power output was obtained compared to the control. The results substantiated that enhanced membrane permeability and pyocyanin production by sophorolipid, which promoted the electron shuttle-mediated EET, underlies the improvement of the energy output in the P. aeruginosa-inoculated MFC. It suggested that addition of biosurfactant could be a promising way to enhance the energy generation in MFCs.
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Affiliation(s)
- Hai-Bo Shen
- College of Biotechnology and Pharmaceutical Engineering, Nanjing TECH University, Nanjing 210009, China; Bioenergy Research Institute, Nanjing TECH University, Nanjing 210009, China
| | - Xiao-Yu Yong
- College of Biotechnology and Pharmaceutical Engineering, Nanjing TECH University, Nanjing 210009, China; Bioenergy Research Institute, Nanjing TECH University, Nanjing 210009, China
| | - Yi-Lu Chen
- College of Biotechnology and Pharmaceutical Engineering, Nanjing TECH University, Nanjing 210009, China
| | - Zhi-Hong Liao
- Biofuels Institute, School of the Environment, Jiangsu University, Zhenjiang 212013, China
| | - Rong-Wei Si
- Biofuels Institute, School of the Environment, Jiangsu University, Zhenjiang 212013, China
| | - Jun Zhou
- College of Biotechnology and Pharmaceutical Engineering, Nanjing TECH University, Nanjing 210009, China; Bioenergy Research Institute, Nanjing TECH University, Nanjing 210009, China
| | - Shu-Ya Wang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing TECH University, Nanjing 210009, China; Bioenergy Research Institute, Nanjing TECH University, Nanjing 210009, China
| | - Yang-Chun Yong
- Biofuels Institute, School of the Environment, Jiangsu University, Zhenjiang 212013, China.
| | - Ping-Kai OuYang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing TECH University, Nanjing 210009, China; Bioenergy Research Institute, Nanjing TECH University, Nanjing 210009, China
| | - Tao Zheng
- College of Biotechnology and Pharmaceutical Engineering, Nanjing TECH University, Nanjing 210009, China; Bioenergy Research Institute, Nanjing TECH University, Nanjing 210009, China.
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192
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Liu XW, Huang YX, Sun XF, Sheng GP, Zhao F, Wang SG, Yu HQ. Conductive carbon nanotube hydrogel as a bioanode for enhanced microbial electrocatalysis. ACS APPLIED MATERIALS & INTERFACES 2014; 6:8158-8164. [PMID: 24818709 DOI: 10.1021/am500624k] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Enhancing microbial electrocatalysis through new material design is essential to the efficient and stable operation of bio-electrochemical system (BES). In this work, a novel conductive carbon nanotube (CNT) hydrogel was fabricated by electrodepositing both CNT and chitosan onto a carbon paper electrode and used as a BES anode electrode. The microscopic, spectroscopic, and electrochemical analytical results show that the CNT hydrogel exhibited an excellent electrochemical activity. In the BES tests, the current generation and the maximum power density of the MFC with the CNT hydrogel increased by 23% and 65%, respectively, compared with the control. This demonstrates that the utilization of such a hydrogel offers an effective approach to enhance the current generation of BES. The great conductivity of CNT and the high content of oxygen-containing functional groups (C-OH, C═O, etc.) on their surface were found to be responsible for the improvements. Our work provides a facile way to prepare appropriate BES electrodes and offers a straightforward and effective route to enhance the BES performance.
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Affiliation(s)
- Xian-Wei Liu
- Department of Chemistry, University of Science and Technology of China , Hefei 230026, China
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