Applied Catalysis B: Environment and Energy ( IF 22.1 ) Pub Date : 2018-05-02 Yiqiu zhang, Chen Lin, Qun Lin, Yubo jin, Yonghao Wang, Zizhong Zhang, Huaxiang Lin, Jinlin Long, Xuxu Wang
CuI-BiOI/Cu film with effective photocatalytic inactivation of E. coli under visible-light-driven (VLD) were prepared on copper sheet and were characterized by TEM, SEM, XRD, XPS and DRS. The photocatalytic inactivation of E. coli of CuI, BiOI, CuI-BiOI and CuI-BiOI/Cu film were investigated. The results showed that CuI-BiOI/Cu film exhibit the most excellent bacteria disinfection activity, and the quantity of viable bacteria could almost inactivate after being illuminated for 2 h. The Laser Scanning Confocal Microscopy (LSCM) observation exhibits that the morphology of bacteria changed a lot after visible light irradiation, and the UV spectra confirm the leakage of bacterial protein. The antibacterial mechanism was studied by employing photoelectrochemical techniques and scavengers of different reactive species, which reveals that the effect of reactive species on the antibacterial activity decrease in order h+ > e-> H2O2>
HO >
O2-. The CuI and Cu play the important role in the separation of h+ and e−. During the photocatalytic process, the CuI act as a hole-transport channel and the Cu act as electron transfer for CuI-BiOI heterostructure, which promotes the separation of photogenerated charges and enhances the photocatalytic antibacterial activity of the as-prepared samples.
中文翻译：
CuI-BiOI / Cu膜可增强光致电荷分离和可见光抗菌活性
在铜片上制备了在可见光驱动（VLD）下具有有效光催化灭活大肠杆菌的CuI-BiOI / Cu膜，并通过TEM，SEM，XRD，XPS和DRS对其进行了表征。研究了CuI，BiOI，CuI-BiOI和CuI-BiOI / Cu膜对大肠杆菌的光催化失活。结果表明，CuI-BiOI / Cu膜表现出最优异的细菌消毒活性，光照2 h后活菌数量几乎失活。激光扫描共聚焦显微镜（LSCM）观察表明，可见光照射后细菌的形态发生了很大变化，而UV光谱证实了细菌蛋白质的泄漏。通过采用光电化学技术和不同反应物种的清除剂研究了抗菌机理，+ > e-> H 2 O 2 >
何>O 2-。崔和Cu起到h的分离的重要作用+和e - 。在光催化过程中，CuI充当空穴传输通道，Cu充当CuI-BiOI异质结构的电子转移，从而促进了光生电荷的分离并增强了所制备样品的光催化抗菌活性。
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