title: Synergistic Effect of Atmospheric-pressure Plasma and TiO2Photocatalysis on Inactivation of Escherichia coli Cells in Aqueous Media.
abstract: Atmospheric-pressure plasma and TiO2photocatalysis have been widely investigated separately for the management and reduction of microorganisms in aqueous solutions. In this paper, the two methods were combined in order to achieve a more profound understanding of their interactions in disinfection of water contaminated by Escherichia coli. Under water discharges carried out by microplasma jet arrays can result in a rapid inactivation of E. coli cells. The inactivation efficiency is largely dependent on the feed gases used, the plasma treatment time, and the discharge power. Compared to atmospheric-pressure N2, He and air microplasma arrays, O2microplasma had the highest activity against E. coli cells in aqueous solution, and showed >99.9% bacterial inactivation efficiency within 4 min. Addition of TiO2photocatalytic film to the plasma discharge reactor significantly enhanced the inactivation efficiency of the O2microplasma system, decreasing the time required to achieve 99.9% killing of E. coli cells to 1 min. This may be attributed to the enhancement of ROS generation due to high catalytic activity and stability of the TiO2photocatalyst in the combined plasma-TiO2systems. Present work demonstrated the synergistic effect of the two agents, which can be correlated in order to maximize treatment efficiency.
authors.affiliation: Fujian Key Laboratory for Plasma and Magnetic Resonance, School of Physics Science and Technology, Xiamen University, Xiamen 361005, China.|School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland 4000, Australia.
authors.forename: Renwu
authors.initials: R
authors.lastname: Zhou
authors.affiliation: Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
authors.forename: Rusen
authors.initials: R
authors.lastname: Zhou
authors.affiliation: Fujian Key Laboratory for Plasma and Magnetic Resonance, School of Physics Science and Technology, Xiamen University, Xiamen 361005, China.|ShenZhen Research Institute of Xiamen University, Shenzhen 518000, China.
authors.forename: Xianhui
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Fujian Key Laboratory for Plasma and Magnetic Resonance, School of Physics Science and Technology, Xiamen University, Xiamen 361005, China.
authors.forename: Jiangwei
authors.initials: J
authors.lastname: Li
authors.affiliation: School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland 4000, Australia.|School of Physics and Electronic Information, Institute of Optoelectronic Materials and Technology, Gannan Normal University, Ganzhou 341000, China.
authors.forename: Xingquan
authors.initials: X
authors.lastname: Wang
authors.affiliation: Fujian Key Laboratory for Plasma and Magnetic Resonance, School of Physics Science and Technology, Xiamen University, Xiamen 361005, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Chen
authors.affiliation: Fujian Key Laboratory for Plasma and Magnetic Resonance, School of Physics Science and Technology, Xiamen University, Xiamen 361005, China.
authors.forename: Size
authors.initials: S
authors.lastname: Yang
authors.affiliation: Fujian Key Laboratory for Plasma and Magnetic Resonance, School of Physics Science and Technology, Xiamen University, Xiamen 361005, China.
authors.forename: Zhong
authors.initials: Z
authors.lastname: Chen
authors.affiliation: School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland 4000, Australia.|CSIRO-QUT Joint Sustainable processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O.Box 218, Lindfield, NSW 2070, Australia.
authors.forename: Kateryna
authors.initials: K
authors.lastname: Bazaka
authors.affiliation: School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland 4000, Australia.|CSIRO-QUT Joint Sustainable processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O.Box 218, Lindfield, NSW 2070, Australia.
authors.forename: Kostya
authors.initials: K
authors.lastname: Ken Ostrikov
mesh_terms: D000388:Air; D001274:Atmospheric Pressure; D002384:Catalysis; D002452:Cell Count; D004203:Disinfection / Q000379:methods*; D004566:Electrodes; D004926:Escherichia coli / Q000502:physiology*; D006371:Helium / Q000737:chemistry; D007700:Kinetics; D010100:Oxygen / Q000737:chemistry*; D058626:Plasma Gases; D011312:Pressure; D017382:Reactive Oxygen Species / Q000737:chemistry; D014025:Titanium / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D018508:Water Purification / Q000379:methods
chemical_list: D058626:Plasma Gases; D017382:Reactive Oxygen Species; D014867:Water; C009495:titanium dioxide; D006371:Helium; D014025:Titanium; D010100:Oxygen