title: The photocatalytic activity of TiO2 thin film deposited on Al plate together with Cu(II) and Ag(I).
abstract: Cu (II) and Ag(I) together with TiO(2) powder were deposited on conducting support substrates to enhance the photocatalytic ability. The catalytic efficiency was tested by monitoring the photocatalytic degradation and detriment of methylene blue (MB) and bovine serum albumin (BSA). The conformational change of BSA induced by catalysts was also observed by circular dichroism spectroscopy.The antibacterial activities were studied by Escherichia coli. Both MB and BSA could be degraded more efficiently than pure TiO(2). After treatment with catalyst, the morphology of cells became twisted and rougher. Regular wrinkles were damaged and groove-like rift appeared on the surface. The fluorescence polarization has shown a significant decrease in membrane fluidity and the increase of permeability of cell membrane. Changes of the spectral profile of E. coli were observed, which suggested the damages of surface groups on the cell membrane.
authors.affiliation: College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, People's Republic of China. zhangtianyu2012@gmail.com
authors.forename: Tianyu
authors.initials: T
authors.lastname: Zhang
authors.forename: Kai
authors.initials: K
authors.lastname: Yao
authors.forename: Yahuan
authors.initials: Y
authors.lastname: Guo
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology; D002384:Catalysis; D002942:Circular Dichroism; D003300:Copper / Q000737:chemistry*; D005454:Fluorescence Polarization; D008855:Microscopy, Electron, Scanning; D010777:Photochemistry; D012834:Silver / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D014025:Titanium / Q000737:chemistry*
chemical_list: D000900:Anti-Bacterial Agents; C009495:titanium dioxide; D012834:Silver; D003300:Copper; D000535:Aluminum; D014025:Titanium