title: Enhanced visible-light-driven photocatalytic inactivation of Escherichia coli by Bi2O2CO3/Bi3NbO7 composites.
abstract: The Bi2O2CO3/Bi3NbO7 (BiCO/BiNbO) composite was successfully fabricated by a simple hydrothermal method and found to be an effective visible-light-driven photocatalyst for inactivation of Escherichia coli (E. coli). The BiCO/BiNbO composite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), UV-vis diffuse reflectance spectrum (UV-vis DRS), and Fourier transform infrared (FT-IR) spectroscopy. The BiCO/BiNbO composite exhibited largely enhanced photocatalytic inactivation of E. coli as compared to the pure Bi3NbO7 under visible light irradiation. The enhanced photocatalytic performance can be attributed to the improved separation efficiency of the photogenerated holes and electrons. In addition, the possible bactericidal mechanism of the BiCO/BiNbO composite under visible light irradiation was discussed.
authors: School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China.
authors: Huihui
authors: H
authors: Gan
authors: Gaoke
authors: G
authors: Zhang
authors: Hongxia
authors: H
authors: Huang
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D002384:Catalysis; D002462:Cell Membrane / Q000187:drug effects; D002473:Cell Wall / Q000187:drug effects; D004203:Disinfection / Q000379:methods; D004583:Electrons; D004926:Escherichia coli / Q000378:metabolism*; D017665:Hydroxyl Radical; D008027:Light; D050296:Microbial Viability; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D009556:Niobium / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry; D010777:Photochemistry / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction
chemical_list: D009556:Niobium; D017665:Hydroxyl Radical; C033301:bismuth oxide; D010100:Oxygen; D001729:Bismuth