N-type Cu2O Film for Photocatalytic and Photoelectrocatalytic Processes: Its stability and Inactivation of E-coli
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摘要Photoelectrocatalytic (PEC) inactivation of Escherichia coli K-12 by cuprous oxide (Cu2O) film irradiated by visible light is firstly reported. A complete inactivation of about 7 log of E. coli was obtained for Cu2O film within 6 h. The bacterial inactivation efficiency was significantly improved in a photoelectrochemical cell, in which 7 log of E. coli could be completely inactivated within 2 h by Cu2O film with a 0.1 V bias. Electric charge transfer between electrodes and E. coli, and electric charge inactivation towards E. coli were investigated using membrane-separated reactor combined with short circuit photocurrent technique. H2O2, hole, and toxicity of Cu2O film were found responsible for the inactivation of E. coli. Toxicity of copper ions (including Cu2+ and Cu+) leakage from Cu2O films was determined and the results showed that the amount of leakage copper ions was not toxic to E. coli. Finally, the Cu2O film was proved to be effective and reusable for PC and PEC inactivation of E. coli. (C) 2014 Elsevier Ltd. All rights reserved.
著者Xiong LB, Ng TW, Yu Y, Xia DH, Yip HY, Li GY, An TC, Zhao HJ, Wong PK
期刊名稱Electrochimica Acta
出版年份2015
月份1
日期20
卷號153
出版社Elsevier
頁次583 - 593
國際標準期刊號0013-4686
電子國際標準期刊號1873-3859
語言英式英語
關鍵詞charge transfer; Cu2O; Escherichia coli; membrane-separated reactor; photoelectrocatalytic inactivation; reactive oxygen species
Web of Science 學科類別Electrochemistry

上次更新時間 2020-19-05 於 01:20