title: Carbon-dot-decorated TiO₂ nanotube arrays used for photo/voltage-induced organic pollutant degradation and the inactivation of bacteria.
abstract: Photoluminescent carbon dots (c-dots) have recently attracted growing interest as a new member of the carbon-nanomaterial family. Here, we report for the first time that c-dot-decorated TiO2 nanotube arrays (c-dot/TiNTs) exhibit highly enhanced abilities regarding photo/voltage-induced organic pollutant degradation and bacterial inactivation. By applying UV irradiation (365 nm) or an electrochemical potential over 3 V (versus Ag/AgCl), an organic dye and a herbicide were efficiently degraded. Moreover, the inactivation of Gram-positive S. aureus and Gram-negative E. coli bacteria was realized on a c-dot/TiNT film. The c-dots were able to absorb light efficiently resulting in multiple exciton generation and also a reduction in the recombination of the e(-)/h(+) pair produced in c-dot/TiNT film during photo/voltage-induced degradation. It was also possible to readily regenerate the surface using ultraviolet light irradiation, leaving the whole film structure undamaged and with high reproducibility and stability.
authors: Laboratory of Chemical Biology, Division of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun, 130022, People's Republic of China.
authors: Lingyan
authors: L
authors: Feng
authors: Hanjun
authors: H
authors: Sun
authors: Jinsong
authors: J
authors: Ren
authors: Xiaogang
authors: X
authors: Qu
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology*; D002384:Catalysis; D002733:Chlorophenols / Q000737:chemistry; D004785:Environmental Pollutants / Q000737:chemistry*; D004926:Escherichia coli / Q000187:drug effects; D008751:Methylene Blue / Q000737:chemistry; D037742:Nanotubes, Carbon / Q000737:chemistry*; D055668:Photochemical Processes; D045663:Quantum Dots / Q000737:chemistry*; D013211:Staphylococcus aureus / Q000187:drug effects; D014025:Titanium / Q000737:chemistry / Q000494:pharmacology*; D014466:Ultraviolet Rays
chemical_list: D000900:Anti-Bacterial Agents; D002733:Chlorophenols; D004785:Environmental Pollutants; D037742:Nanotubes, Carbon; C009495:titanium dioxide; C029107:4-chlorophenol; D014025:Titanium; D008751:Methylene Blue