Synergistic Effect of Atmospheric-pressure Plasma and TiO(2) Photocatalysis on Inactivation of Escherichia coli Cells in Aqueous Media.
Synergistic Effect of Atmospheric-pressure Plasma and TiO(2) Photocatalysis on Inactivation of Escherichia coli Cells in Aqueous Media.
复制标题
常压等离子体和 TiO2 光催化对水介质中大肠杆菌细胞灭活的协同作用
DOI：
10.1038/srep39552
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发表时间：
2016-12-22
影响因子：
4.6
通讯作者：
Ken Ostrikov K
中科院分区：
文献类型：
--
作者：
Zhou R;Zhou R;Zhang X;Li J;Wang X;Chen Q;Yang S;Chen Z;Bazaka K;Ken Ostrikov K
大气压等离子体和TiO 2纳米粒子已被广泛研究，分别用于管理和减少水溶液中的微生物。本文将这两种方法结合起来，以达到更深刻的理解，它们在大肠杆菌污染的水消毒的相互作用。利用微等离子体射流阵列进行水下放电，可使大肠杆菌快速失活。大肠杆菌细胞。灭活效率在很大程度上取决于所使用的进料气体、等离子体处理时间和放电功率。与常压N2、He和空气微等离子体阵列相比，O2微等离子体阵列对大肠杆菌的活性最高。在等离子体放电反应器中添加TiO 2光催化膜，可显著提高O2微等离子体系统的灭活效率，缩短了达到99.9%杀灭大肠杆菌所需的时间。这可能是由于等离子体-TiO 2复合体系中TiO 2光催化剂的高催化活性和稳定性增强了ROS的产生。目前的工作证明了这两种药物的协同作用，这可以是相关的，以最大限度地提高治疗效率。
Atmospheric-pressure plasma and TiO 2 photocatalysis 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 N 2, He and air microplasma arrays, O 2 microplasma had the highest activity against E. coli cells in aqueous solution, and showed> 99.9% bacterial inactivation efficiency within 4 min. Addition of TiO 2 photocatalytic film to the plasma discharge reactor significantly enhanced the inactivation efficiency of the O 2 microplasma 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 TiO 2 photocatalyst in the combined plasma-TiO 2 systems. Present work demonstrated the synergistic effect of the two agents, which can be correlated in order to maximize treatment efficiency.