title: Nanocrystal Cu2O-loaded TiO2 nanotube array films as high-performance visible-light bactericidal photocatalyst.
abstract: 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.
authors: Centre for Clean Environment and Energy, and Griffith School of Environment, Gold Coast Campus, Griffith University, Gold Coast, QLD, 4222, Australia.
authors: Shengsen
authors: S
authors: Zhang
authors: Chang
authors: C
authors: Liu
authors: Xiaolu
authors: X
authors: Liu
authors: Haimin
authors: H
authors: Zhang
authors: Porun
authors: P
authors: Liu
authors: Shanqing
authors: S
authors: Zhang
authors: Feng
authors: F
authors: Peng
authors: Huijun
authors: H
authors: Zhao
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology* / Q000528:radiation effects; D003300:Copper / Q000737:chemistry / Q000494:pharmacology* / Q000528:radiation effects; D004926:Escherichia coli / Q000187:drug effects*; D005609:Free Radicals / Q000494:pharmacology; D006878:Hydroxides / Q000494:pharmacology; D008027:Light; D050296:Microbial Viability / Q000187:drug effects; D049329:Nanostructures / Q000737:chemistry / Q000528:radiation effects; D055668:Photochemical Processes; D013057:Spectrum Analysis; D014025:Titanium / Q000737:chemistry / Q000494:pharmacology* / Q000528:radiation effects
chemical_list: D000900:Anti-Bacterial Agents; D005609:Free Radicals; D006878:Hydroxides; C009495:titanium dioxide; D003300:Copper; D014025:Titanium; C000520:cuprous oxide