Centre for Clean Environment and Energy, and Griffith School of Environment, Gold Coast Campus, Griffith University, Gold Coast, QLD, 4222, Australia.
Appl Microbiol Biotechnol. 2012 Dec;96(5):1201-7. doi: 10.1007/s00253-012-4233-7. Epub 2012 Jun 28.
In this work, we report the use of a non-toxic nanocrystal Cu(2)O-loaded TiO(2) nanotube array (Cu(2)O/TNTs) film as high-performance visible-light bactericidal photocatalyst. The samples were characterized by field-emission scanning electron microscopy, X-ray photoelectron spectroscopy, and ultraviolet-visible diffusion reflection spectroscopy. This Cu(2)O/TNTs film photocatalyst is capable of complete inactivation of Escherichia coli in 5 × 10(7) colony-forming units/mL within a record short disinfection time of 20 min under visible-light irradiation. The average bactericidal percentage of the Cu(2)O/TNTs for E. coli under visible-light irradiation are 20 times and 6.6 times higher than those of TNTs under the same conditions and Cu(2)O/TNTs without light, respectively. This superior bactericidal performance is mainly attributed to the high ability to produce OH radicals by both photogenerated electron and hole of the prepared photocatalyst under visible light. The Cu(2)O/TNTs film photocatalyst makes it applicable to broad fields including drinking water disinfection.
在这项工作中，我们报告了使用无毒纳米晶氧化铜负载的二氧化钛纳米管阵列（Cu2O/TNTs）薄膜作为高性能可见光杀菌光催化剂。通过场发射扫描电子显微镜、X 射线光电子能谱和紫外可见漫反射光谱对样品进行了表征。在可见光照射下，Cu2O/TNTs 薄膜光催化剂在 20 分钟的记录短消毒时间内能够完全灭活 5×107 个菌落形成单位/mL 的大肠杆菌。在可见光照射下，Cu2O/TNTs 对大肠杆菌的平均杀菌率分别比相同条件下的 TNTs 和无光下的 Cu2O/TNTs 高 20 倍和 6.6 倍。这种优异的杀菌性能主要归因于在可见光下制备的光催化剂的光生电子和空穴具有高能力产生 OH 自由基。Cu2O/TNTs 薄膜光催化剂使其适用于包括饮用水消毒在内的广泛领域。
