title: Enhanced bactericidal action of SnO2 nanostructures having different morphologies under visible light: influence of surfactant.
abstract: The practical use of visible-light for bactericide treatment has been established by tin oxide nanostructures synthesized using a surfactant-assisted solvothermal method. Anionic (sodium n-dodecyl sulfate, SDS), cationic (cetyltrimethyl ammonium bromide, CTAB) and non-ionic (Tritron X-100) surfactants were used as morphology controlling agents. The as-synthesized nanoparticles are characterized by X-ray powder diffraction (XRD), UV-vis spectroscopy and scanning electron microscopy (SEM). The XRD patterns of the as-synthesized tin oxide nanoparticles were well indexed to the tetragonal rutile structure. Nanostructure tin oxide powders of about 70-92nm in size have been obtained with different morphologies. The spherical, cauliflower, flower petals morphologies of surfactant-mediated SnO2 were obtained using X-100, CTAB, and SDS, respectively and the spherical-like for surfactant-free SnO2 was observed in the SEM micrographs. The surfactant-mediated SnO2 samples showed absorption edges red shift to longer wavelength and increased absorption intensities compared to surfactant-free SnO2. Antibacterial effectiveness of SnO2 samples was tested against general Escherichia coli (E. coli ATCC 25922) under UV-, visible-light and dark conditions. The surfactant promoted antimicrobial effect under visible light by SnO2 band gap modification. In contrast, the surfactant-free SnO2 possessed higher photokilling activity under UV-light. The antibacterial performance of SnO2 samples as a function of their structural and morphological features such as particle size, surface area and visible/UV light absorbing capacity was discussed.
authors: Department of Chemistry, Shahreza Branch, Islamic Azad University, Razi Chemistry Research Centre, 86145-311 Shahreza, Isfahan, Iran. Electronic address: talebiannasrin@gmail.com.
authors: Nasrin
authors: N
authors: Talebian
authors: Department of Chemistry, Shahreza Branch, Islamic Azad University, Razi Chemistry Research Centre, 86145-311 Shahreza, Isfahan, Iran.
authors: Hoda
authors: H
authors: Sadeghi Haddad Zavvare
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology / Q000528:radiation effects; D002384:Catalysis; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D004926:Escherichia coli / Q000187:drug effects*; D008027:Light; D053768:Metal Nanoparticles / Q000008:administration & dosage / Q000737:chemistry / Q000528:radiation effects; D017830:Octoxynol / Q000737:chemistry; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D013501:Surface-Active Agents / Q000737:chemistry*; D017971:Tin Compounds / Q000737:chemistry / Q000494:pharmacology / Q000528:radiation effects
chemical_list: D000900:Anti-Bacterial Agents; D002593:Cetrimonium Compounds; D013501:Surface-Active Agents; D017971:Tin Compounds; D012967:Sodium Dodecyl Sulfate; D017830:Octoxynol; C045358:stannic oxide; D000077286:Cetrimonium
keywords: Bactericide property; Morphology; SnO(2); Solvothermal; Surfactant