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Ternary composite of TiO2 nanotubes/Ti plates modified by g-C3N4 and SnO2 with enhanced photocatalytic activity for enhancing antibacterial and photocatalytic activity

Faraji, M ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jphotobiol.2017.11.009
  3. Publisher: Elsevier B.V , 2018
  4. Abstract:
  5. A series of g-C3N4-SnO2/TiO2 nanotubes/Ti plates were fabricated via simple dipping of TiO2 nanotubes/Ti in a solution containing SnCl2 and g-C3N4 nanosheets and finally annealing of the plates. Synthesized plates were characterized by various techniques. The SEM analysis revealed that the g-C3N4-SnO2 nanosheets with high physical stability have been successfully deposited onto the surface of TiO2 nanotubes/Ti plate. Photocatalytic activity was investigated using two probe chemical reactions: oxidative decomposition of acetic acid and oxidation of 2-propanol under irradiation. Antibacterial activities for Escherichia coli (E. coli) bacteria were also investigated in dark and under UV/Vis illuminations. Detailed characterization and results of photocatalytic and antibacterial activity tests revealed that semiconductor coupling significantly affected the photocatalyst properties synthesized and hence their photocatalytic and antibacterial activities. Modification of TiO2 nanotubes/Ti plates with g-C3N4-SnO2 deposits resulted in enhanced photocatalytic activities in both chemical and microbial systems. The g-C3N4-SnO2/TiO2 nanotubes/Ti plate exhibited the highest photocatalytic and antibacterial activity, probably due to the heterojunction between g-C3N4-SnO2 and TiO2 nanotubes/Ti in the ternary composite plate and thus lower electron/hole recombination rate. Based on the obtained results, a photocatalytic and an antibacterial mechanism for the degradation of E. coli bacteria and chemical pollutants over g-C3N4-SnO2/TiO2 nanotubes/Ti plate were proposed and discussed. © 2017 Elsevier B.V
  6. Keywords:
  7. 2-propanol ; Acetic acid ; Antibacterial and photocatalytic activity ; Escherichia coli ; g-C3N4-SnO2 ; TiO2 nanotubes/Ti plate ; Nanoparticle ; Tin dioxide nanoparticle ; Titanium dioxide nanoparticle ; Unclassified drug ; Antiinfective agent ; Cyanogen ; Nanotube ; Nitrile ; Stannic oxide ; Tin derivative ; Titanium dioxide ; Antibacterial activity ; Article ; Bacterial cell ; Bacterial survival ; Chemical structure ; Controlled study ; Electron transport ; Hydrogen bond ; Molecular stability ; Nanofabrication ; Nonhuman ; Photocatalysis ; Photodegradation ; Priority journal ; Radiation absorption ; Ultraviolet radiation ; Chemistry ; Drug effects ; Drug stability ; Mechanics ; Photochemistry ; Anti-Bacterial Agents ; Catalysis ; Drug Stability ; Electrochemistry ; Mechanical Phenomena ; Nanotubes ; Nitriles ; Photochemical Processes ; Tin Compounds ; Titanium
  8. Source: Journal of Photochemistry and Photobiology B: Biology ; Volume 178 , 2018 , Pages 124-132 ; 10111344 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S101113441730800X