title: In-situ growth of graphene/polyaniline for synergistic improvement of extracellular electron transfer in bioelectrochemical systems.
abstract: Graphene composite has been widely used in various bioelectrochemical systems (BES). However, it is suffered from tedious fabrication procedure and ambiguous mechanism for its effect on BES. Here, a one-step and in-situ strategy for simultaneously graphene exfoliation and aniline polymerization was developed for fabrication of graphene/PANI composite electrode (GO/PANIOS). This GO/PANIOSoutperformed graphite paper (GP), GP with PANI (GP/PANI) and GP with electrochemical exfoliated graphene (GOH2SO4) in Shewanella oneidensis MR-1 inoculated BES (improved the power density output, i.e., 24, 3.4 and 5.7 times of GP , GP/PANI and GOH2SO4, respectively). Further analysis revealed a synergistic improvement on both direct and mediated extracellular electron transfer of S. oneidensis MR-1 by GO/PANIOScontributed to its performance enhancement in BES. This work not only provided a simple strategy for graphene composite fabrication, but also unveiled the underlying mechanism for its stimulation on BES, which promises new opportunity of graphene composite application in various biosystems.
authors: Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China.
authors: De-Zhen
authors: DZ
authors: Sun
authors: Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China.
authors: Yang-Yang
authors: YY
authors: Yu
authors: Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China.
authors: Rong-Rong
authors: RR
authors: Xie
authors: Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China.
authors: Chun-Lian
authors: CL
authors: Zhang
authors: Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China.
authors: Yuan
authors: Y
authors: Yang
authors: Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China; College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, Henan Province, China.
authors: Dan-Dan
authors: DD
authors: Zhai
authors: Institute for Advanced Materials, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China.
authors: Guodong
authors: G
authors: Yang
authors: Institute for Advanced Materials, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China.
authors: Lei
authors: L
authors: Liu
authors: Biofuels Institute, School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China. Electronic address: ycyong@ujs.edu.cn.
authors: Yang-Chun
authors: YC
authors: Yong
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D001674:Bioelectric Energy Sources / Q000382:microbiology*; D004566:Electrodes; D004579:Electron Transport; D004583:Electrons; D004867:Equipment Design; D006108:Graphite / Q000737:chemistry*; D008958:Models, Molecular; D020592:Shewanella / Q000166:cytology / Q000378:metabolism*
chemical_list: D000814:Aniline Compounds; C416807:polyaniline; D006108:Graphite
keywords: Bioelectrochemical systems; Extracellular electron transfer; Graphene; Microbial fuel cell; Polyaniline