Highly Active Bidirectional Electron Transfer by a Self-Assembled Electroactive Reduced- Graphene-Oxide-Hybridized Biofilm
Highly Active Bidirectional Electron Transfer by a Self-Assembled Electroactive Reduced- Graphene-Oxide-Hybridized Biofilm
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通过自组装电活性还原氧化石墨烯杂化生物膜实现高活性双向电子转移
DOI：
10.1002/anie.201400463
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发表时间：
2014
影响因子：
16.6
通讯作者：
Hao Song
中科院分区：
文献类型：
--
作者：
Yang-Chun Yong;Yang-Yang Yu;Xinhai Zhang;Hao Song
低的细胞外电子传递性能通常是开发高性能生物电化学系统的瓶颈。在本文中，我们表明氧化石墨烯和希瓦氏菌（Shewanella oneidensisMR-1）的自组装形成了电活性的、还原的氧化石墨烯杂化的三维大孔生物膜，由于高生物量掺入和增强的直接接触式细胞外电子转移，这使得希瓦氏菌和电极之间能够高效地双向电子转移。这种3D电活性生物膜与天然存在的生物膜相比，向外电流（氧化电流，从细菌到电极的电子通量）增加了25倍，向内电流（还原电流，从电极到细菌的电子通量）增加了74倍。
Low extracellular electron transfer performance is often a bottleneck in developing high‐performance bioelectrochemical systems. Herein, we show that the self‐assembly of graphene oxide andShewanella oneidensisMR‐1 formed an electroactive, reduced‐graphene‐oxide‐hybridized, three‐dimensional macroporous biofilm, which enabled highly efficient bidirectional electron transfers between Shewanella and electrodes owing to high biomass incorporation and enhanced direct contact‐based extracellular electron transfer. This 3D electroactive biofilm delivered a 25‐fold increase in the outward current (oxidation current, electron flux from bacteria to electrodes) and 74‐fold increase in the inward current (reduction current, electron flux from electrodes to bacteria) over that of the naturally occurring biofilms.