Enhanced photocurrent production by the synergy of hematite   nanowire-arrayed photoanode and bioengineered Shewanella oneidensis MR-1

doi:10.1016/j.bios.2017.03.006

CORC > 北京大学 > 地球与空间科学学院

	Enhanced photocurrent production by the synergy of hematite nanowire-arrayed photoanode and bioengineered Shewanella oneidensis MR-1
	Zhu, Gaolong ; Yang, Yun ; Liu, Juan ; Liu, Feng ; Lu, Anhuai ; He, Weidong
刊名	BIOSENSORS & BIOELECTRONICS
	2017
关键词	Solar-assisted microbial photoelectrochemical system Hematite nanowire-arrayed photoelectrode Bio-engineered Shewanella oneidensis MR-1 Light-to-electricity conversion Bioelectron supply MICROBIAL FUEL-CELLS EXTRACELLULAR ELECTRON-TRANSFER MEMBRANE CYTOCHROME OMCA PERFORMANCE BACTERIA ENERGY MICROORGANISMS CHALLENGES MECHANISM MINERALS
DOI	10.1016/j.bios.2017.03.006
英文摘要	Coupling the light-harvesting capabilities of semiconductors with the catalytic power of bacteria is a promising way to increase the efficiency of bioelectrochemical systems. Here, we reported the enhanced photocurrents produced by the synergy of hematite nanowire-arrayed photoanode and the bio-engineered Shewanella oneidensis MR-1 in a solar-assisted microbial photoelectrochemical system (solar MPS) under the visible light. To increase the supply of bioelectrons, the D-lactate transporter, 501522, was overexpressed in the recombinant S. oneidensis (T-SO1522) that could digest D-lactate 61% faster than the wild-type S. oneidenesis. Without light illumination, the addition of either the wild-type or the recombinant S. oneidensis to the system did not induce any obvious increase in the current output. However, under one-sun illumination, the photocurrent of the abiotic control was 16 +/- 2 mu A cm(-2) at 0.8 V vs. Ag/AgCl, and the addition of the wild-type S. oneidensis and the recombinant S. oneidensis increased the photocurrent to 70 +/- 6 and 95 +/- 8 mu A cm(-2), respectively, at 0.8 V vs. Ag/AgCl. Moreover, the solar MPS with T-SO1522 presented quick and repeatable responses to the on/off illumination cycles, and had relatively stable photocurrent generation in the 273-h operation. Scanning electron microscope (SEM) images showed that the cell density on the hematite photoelectrode was similar between the recombinant and the wild-type S. oneidensis. These findings revealed the pronounced influence of metabolic rates on the light-to-electricity conversion in the complex photocatalyst-electricigen hybrid system, which is important to promote the development of the solar MPS for electricity production and wastewater treatment.; National Basic Research Program of China (973 Program) [2014CB846001]; National Natural Science Foundation of China [41472306]; China Postdoctoral Science Foundation [2016M591043]; SCI(E); ARTICLE; 227-234; 94
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/471495]
专题	地球与空间科学学院环境科学与工程学院
推荐引用方式 GB/T 7714	Zhu, Gaolong,Yang, Yun,Liu, Juan,et al. Enhanced photocurrent production by the synergy of hematite nanowire-arrayed photoanode and bioengineered Shewanella oneidensis MR-1[J]. BIOSENSORS & BIOELECTRONICS,2017.
APA	Zhu, Gaolong,Yang, Yun,Liu, Juan,Liu, Feng,Lu, Anhuai,&He, Weidong.(2017).Enhanced photocurrent production by the synergy of hematite nanowire-arrayed photoanode and bioengineered Shewanella oneidensis MR-1.BIOSENSORS & BIOELECTRONICS.
MLA	Zhu, Gaolong,et al."Enhanced photocurrent production by the synergy of hematite nanowire-arrayed photoanode and bioengineered Shewanella oneidensis MR-1".BIOSENSORS & BIOELECTRONICS (2017).