PMID- 26505239
OWN - NLM
STAT- MEDLINE
DCOM- 20160907
LR  - 20161126
IS  - 2040-3372 (Electronic)
IS  - 2040-3364 (Linking)
VI  - 7
IP  - 44
DP  - 2015 Nov 28
TI  - Facilitated extracellular electron transfer of Shewanella loihica PV-4 by 
      antimony-doped tin oxide nanoparticles as active microelectrodes.
PG  - 18763-9
LID - 10.1039/c5nr04765j [doi]
AB  - Dissimilatory metal reducing bacteria are capable of extracellular electron 
      transfer (EET) to insoluble metal oxides as external electron acceptors for their 
      anaerobic respiration, which is recognized as an important energy-conversion 
      process in natural and engineered environments, such as in mineral cycling, 
      bioremediation, and microbial fuel/electrolysis cells. However, the low EET 
      efficiency remains one of the major bottlenecks for its practical application. We 
      report firstly that the microbial current generated by Shewanella loihica PV-4 
      (S. loihica PV-4) could be greatly improved that is up to ca. 115 fold, by adding 
      antimony-doped tin oxide (ATO) nanoparticles in the electrochemical reactor. The 
      results demonstrate that the biocompatible, electrically conductive ATO 
      nanoparticles acted as active microelectrodes could facilitate the formation of a 
      cells/ATO composite biofilm and the reduction of the outer membrane c-type 
      cytochromes (OM c-Cyts) that are beneficial for the electron transfer from cells 
      to electrode. Meanwhile, a synergistic effect between the participation of OM 
      c-Cyts and the accelerated EET mediated by cell-secreted flavins may play an 
      important role for the enhanced current generation in the presence of ATO 
      nanoparticles. Moreover, it is worth noting that the TCA cycle in S. loihica PV-4 
      cells is activated by adding ATO nanoparticles, even if the potential is poised 
      at +0.2 V, thereby also improving the EET process. The results presented here may 
      provide a simple and effective strategy to boost the EET of S. loihica PV-4 
      cells, which is conducive to providing potential applications in 
      bioelectrochemical systems.
FAU - Zhang, Xiaojian
AU  - Zhang X
AD  - Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of 
      Ministry of Education, Beijing Key Laboratory of Bio-inspired Energy Materials 
      and Devices, School of Chemistry and Environment, Beihang University, Beijing 
      100191, PR China. zhuying@buaa.edu.cn.
FAU - Liu, Huan
AU  - Liu H
FAU - Wang, Jinrong
AU  - Wang J
FAU - Ren, Guangyuan
AU  - Ren G
FAU - Xie, Beizhen
AU  - Xie B
FAU - Liu, Hong
AU  - Liu H
FAU - Zhu, Ying
AU  - Zhu Y
FAU - Jiang, Lei
AU  - Jiang L
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20151027
PL  - England
TA  - Nanoscale
JT  - Nanoscale
JID - 101525249
RN  - 0 (Tin Compounds)
RN  - KM7N50LOS6 (stannic oxide)
SB  - IM
MH  - Electron Transport
MH  - Microelectrodes
MH  - Nanoparticles/*chemistry
MH  - Shewanella/*metabolism
MH  - Tin Compounds/*chemistry
EDAT- 2015/10/28 06:00
MHDA- 2016/09/08 06:00
CRDT- 2015/10/28 06:00
PHST- 2015/10/28 06:00 [entrez]
PHST- 2015/10/28 06:00 [pubmed]
PHST- 2016/09/08 06:00 [medline]
AID - 10.1039/c5nr04765j [doi]
PST - ppublish
SO  - Nanoscale. 2015 Nov 28;7(44):18763-9. doi: 10.1039/c5nr04765j. Epub 2015 Oct 27.