Facilitated extracellular electron transfer of Shewanella loihica PV-4 by antimony-doped tin oxide nanoparticles as active microelectrodes

	Facilitated extracellular electron transfer of Shewanella loihica PV-4 by antimony-doped tin oxide nanoparticles as active microelectrodes
	Zhang, Xiaojian 1; Liu, Huan 1; Wang, Jinrong 1; Ren, Guangyuan 1; Xie, Beizhen 2; Liu, Hong 2; Zhu, Ying 1; Jiang, Lei 3
刊名	NANOSCALE
	2015
卷号	7 期号:44 页码:18763-18769
英文摘要	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.
收录类别	SCI
语种	英语
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/29293]
专题	化学研究所_有机固体实验室
作者单位	1.Beihang Univ, Sch Chem & Environm,Minist Educ, Beijing Key Lab Bioinspired Energy Mat & Devices, Key Lab Bioinspired Smart Interfacial Sci & Tech, Beijing 100191, Peoples R China 2.Beihang Univ, Sch Biol Sci & Med Engn, Beijing 100191, Peoples R China 3.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100191, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xiaojian,Liu, Huan,Wang, Jinrong,et al. Facilitated extracellular electron transfer of Shewanella loihica PV-4 by antimony-doped tin oxide nanoparticles as active microelectrodes[J]. NANOSCALE,2015,7(44):18763-18769.
APA	Zhang, Xiaojian.,Liu, Huan.,Wang, Jinrong.,Ren, Guangyuan.,Xie, Beizhen.,...&Jiang, Lei.(2015).Facilitated extracellular electron transfer of Shewanella loihica PV-4 by antimony-doped tin oxide nanoparticles as active microelectrodes.NANOSCALE,7(44),18763-18769.
MLA	Zhang, Xiaojian,et al."Facilitated extracellular electron transfer of Shewanella loihica PV-4 by antimony-doped tin oxide nanoparticles as active microelectrodes".NANOSCALE 7.44(2015):18763-18769.