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Bifunctional silver nanoparticle cathode in microbial fuel cells for microbial growth inhibition with comparable oxygen reduction reaction activity.
Environ Sci Technol. 2011 Jun 15; 45(12):5441-6.ES

Abstract

Organic contamination of water bodies in which benthic microbial fuel cells (benthic MFCs) are installed, and organic crossover from the anode to the cathode of membraneless MFCs, is a factor causing oxygen depletion and substrate loss in the cathode due to the growth of heterotrophic aerobic bacteria. This study examines the possible use of silver nanoparticles (AgNPs) as a cathodic catalyst for MFCs suffering from organic contamination and oxygen depletion. Four treated cathodes (AgNPs-coated, Pt/C-coated, Pt/C+AgNPs-coated, and plain graphite cathodes) were prepared and tested under high levels of organics loading. During operation (fed with 50 mM acetate), the AgNPs-coated system showed the highest DO concentration (0.8 mg/L) in the cathode area as well as the highest current (ranging from 0.04 to 0.12 mA). Based on these results, we concluded that (1) the growth of oxygen-consuming heterotrophic microbes could be inhibited by AgNPs, (2) the function of AgNPs as a bacterial growth inhibitor resulted in a greater increase of DO concentration in the cathode than the other tested cathode systems, (3) AgNPs could be applied as a cathode catalyst for oxygen reduction, and as a result (4) the MFC with the AgNPs-coated cathode led to the highest current generation among the tested MFCs.

Authors+Show Affiliations

School of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), Buk-gu, Gwangju 500-712, Korea.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21585217

Citation

An, Junyeong, et al. "Bifunctional Silver Nanoparticle Cathode in Microbial Fuel Cells for Microbial Growth Inhibition With Comparable Oxygen Reduction Reaction Activity." Environmental Science & Technology, vol. 45, no. 12, 2011, pp. 5441-6.
An J, Jeon H, Lee J, et al. Bifunctional silver nanoparticle cathode in microbial fuel cells for microbial growth inhibition with comparable oxygen reduction reaction activity. Environ Sci Technol. 2011;45(12):5441-6.
An, J., Jeon, H., Lee, J., & Chang, I. S. (2011). Bifunctional silver nanoparticle cathode in microbial fuel cells for microbial growth inhibition with comparable oxygen reduction reaction activity. Environmental Science & Technology, 45(12), 5441-6. https://doi.org/10.1021/es2000326
An J, et al. Bifunctional Silver Nanoparticle Cathode in Microbial Fuel Cells for Microbial Growth Inhibition With Comparable Oxygen Reduction Reaction Activity. Environ Sci Technol. 2011 Jun 15;45(12):5441-6. PubMed PMID: 21585217.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Bifunctional silver nanoparticle cathode in microbial fuel cells for microbial growth inhibition with comparable oxygen reduction reaction activity. AU - An,Junyeong, AU - Jeon,Hongrae, AU - Lee,Jaeyoung, AU - Chang,In Seop, Y1 - 2011/05/17/ PY - 2011/5/19/entrez PY - 2011/5/19/pubmed PY - 2011/10/1/medline SP - 5441 EP - 6 JF - Environmental science & technology JO - Environ Sci Technol VL - 45 IS - 12 N2 - Organic contamination of water bodies in which benthic microbial fuel cells (benthic MFCs) are installed, and organic crossover from the anode to the cathode of membraneless MFCs, is a factor causing oxygen depletion and substrate loss in the cathode due to the growth of heterotrophic aerobic bacteria. This study examines the possible use of silver nanoparticles (AgNPs) as a cathodic catalyst for MFCs suffering from organic contamination and oxygen depletion. Four treated cathodes (AgNPs-coated, Pt/C-coated, Pt/C+AgNPs-coated, and plain graphite cathodes) were prepared and tested under high levels of organics loading. During operation (fed with 50 mM acetate), the AgNPs-coated system showed the highest DO concentration (0.8 mg/L) in the cathode area as well as the highest current (ranging from 0.04 to 0.12 mA). Based on these results, we concluded that (1) the growth of oxygen-consuming heterotrophic microbes could be inhibited by AgNPs, (2) the function of AgNPs as a bacterial growth inhibitor resulted in a greater increase of DO concentration in the cathode than the other tested cathode systems, (3) AgNPs could be applied as a cathode catalyst for oxygen reduction, and as a result (4) the MFC with the AgNPs-coated cathode led to the highest current generation among the tested MFCs. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/21585217/Bifunctional_silver_nanoparticle_cathode_in_microbial_fuel_cells_for_microbial_growth_inhibition_with_comparable_oxygen_reduction_reaction_activity_ L2 - https://doi.org/10.1021/es2000326 DB - PRIME DP - Unbound Medicine ER -