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FeS 2 Nanoparticles Decorated Graphene as Microbial‐Fuel‐Cell Anode Achieving High Power Density
Author(s) -
Wang Ruiwen,
Yan Mei,
Li Huidong,
Zhang Lu,
Peng Benqi,
Sun Jinzhi,
Liu Da,
Liu Shaoqin
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201800618
Subject(s) - microbial fuel cell , anode , materials science , graphene , power density , nanoparticle , nanotechnology , geobacter , chemical engineering , electrode , power (physics) , chemistry , bacteria , physics , engineering , quantum mechanics , biofilm , biology , genetics
Microbial fuel cells (MFCs) have received great attention worldwide due to their potential in recovering electrical energy from waste and inexhaustible biomass. Unfortunately, the difficulty of achieving the high power, especially in real samples, remains a bottleneck for their practical applications. Herein, FeS 2 nanoparticles decorated graphene is fabricated via a simple hydrothermal reaction. The FeS 2 nanoparticles decorated graphene anode not only benefits bacterial adhesion and enrichment of electrochemically active Geobacter species on the electrode surface but also promotes efficient extracellular electron transfer, thus giving rise to a fast start‐up time of 2 d, an unprecedented power density of 3220 mW m −2 and a remarkable current density of 3.06 A m −2 in the acetate‐feeding and mixed bacteria‐based MFCs. Most importantly, the FeS 2 nanoparticles decorated graphene anode successfully achieves a power density of 310 mW m −2 with simultaneous removal of 1319 ± 28 mg L −1 chemical oxygen demand in effluents from a beer factory wastewater. The characteristics of improved power generation and enhanced pollutant removal efficiency opens the door toward development of high‐performance MFCs via rational anode design for practical application.