title: Enhanced electrical contact of microbes using Fe(3)O(4)/CNT nanocomposite anode in mediator-less microbial fuel cell.
abstract: A novel Fe(3)O(4)/CNT nanocomposite was synthesized and employed for the modification of carbon paper anode in a mediator-less microbial fuel cell (MFC) to enhance its performance. The Fe(3)O(4)/CNT composite modified anodes with various Fe(3)O(4) contents were investigated to find the optimum ratio of the nanocomposite for the best MFC performance. The Fe(3)O(4)/CNT modified anodes produced much higher power densities than unmodified carbon anode and the 30wt% Fe3O4/CNT modified anode exhibited a maximum power density of 830mW/m(2). In the Fe(3)O(4)/CNT composite modified anode, Fe(3)O(4) helps to attach the CNT on anode surface by its magnetic attraction and forms a multi layered network, whereas CNT offers a better nanostructure environment for bacterial growth and helps electron transfer from E.coli to electrode resulting in the increase in the current production with the catalytic activity of bacteria. The electrocatalytic behavior and all possible mechanism for their better performance are discussed in detail with the help of various structural and electrochemical techniques.
authors.affiliation: Specialized Graduate School of Hydrogen and Fuel Cell Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea.
authors.forename: In Ho
authors.initials: IH
authors.lastname: Park
authors.affiliation: R&D Education Center for Fuel Cell Materials & Systems, Chonbuk National University, Jeonju 561-756, Republic of Korea.
authors.forename: Maria
authors.initials: M
authors.lastname: Christy
authors.affiliation: Specialized Graduate School of Hydrogen and Fuel Cell Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea; R&D Education Center for Fuel Cell Materials & Systems, Chonbuk National University, Jeonju 561-756, Republic of Korea; School of Chemical Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea.
authors.forename: Pil
authors.initials: P
authors.lastname: Kim
authors.affiliation: Specialized Graduate School of Hydrogen and Fuel Cell Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea; R&D Education Center for Fuel Cell Materials & Systems, Chonbuk National University, Jeonju 561-756, Republic of Korea; School of Chemical Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea. Electronic address: nahmks@jbnu.ac.kr.
authors.forename: Kee Suk
authors.initials: KS
authors.lastname: Nahm
mesh_terms: D001422:Bacterial Adhesion / Q000502:physiology; D001674:Bioelectric Energy Sources / Q000382:microbiology*; D018441:Biofilms / Q000254:growth & development; D002384:Catalysis; D004566:Electrodes / Q000382:microbiology; D004735:Energy Transfer / Q000502:physiology; D004867:Equipment Design; D019544:Equipment Failure Analysis; D004926:Escherichia coli / Q000502:physiology*; D005290:Ferric Compounds / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D005290:Ferric Compounds; D037742:Nanotubes, Carbon; C000499:ferric oxide
keywords: Electro-catalysis; Electron transfer; Microbial fuel cell; Modified anode; Nanocomposite; Power production