title: Synthesis and potential applications of silver-porous aluminium oxide nanocomposites as prospective antiseptics and bactericides.
abstract: Alumina micro-spheres with mesoporous structure called porous aluminium oxide (POA) were prepared through a hydrothermal method using Al2(SO4)3·18H2O followed by a thermal decomposition process. Silver nanocomposites of POA (Ag/POAs) with high biochemical activity were synthesized by sorption of silver nanoparticles in the matrix of POA. Synthesis of Ag/POAs using photochemical reduction enables the producing silver nanoparticles preventing their aggregation. Ag/POAs demonstrated a stronger bactericidal activity than POA. The colony-forming ability of Escherichia coli was completely lost in 1 day on Ag/POAs at silver nanoparticles concentration of 0.241 ppm. Staphylococcus epidermidis displayed higher tolerance to Ag/POAs at all silver nanoparticles concentrations, the growth of Staphylococcus epidermidis was stopped at concentration of 0.374 ppm. The bactericidal activity of Ag/POAs against bacteria in drinking water was found to be highly effective, the growth of bacteria was completely lost in 1 day at silver nanoparticles concentration of 0.108 ppm.
authors.affiliation: Institute of Technical Chemistry, Ural Branch of Russian Academy of Sciences, Korolev str., 3, Perm, 614013, Russia. mngorb@yandex.ru.
authors.forename: Marina
authors.initials: M
authors.lastname: Gorbunova
authors.affiliation: Institute of Ecology and Genetics of Microorganisms, Ural Branch of Russian Academy of Sciences, Lenin str., 11, Perm, 614090, Russia.
authors.forename: Larisa
authors.initials: L
authors.lastname: Lemkina
authors.affiliation: Institute of Technical Chemistry, Ural Branch of Russian Academy of Sciences, Korolev str., 3, Perm, 614013, Russia.
authors.forename: Irina
authors.initials: I
authors.lastname: Lebedeva
authors.affiliation: Institute of Technical Chemistry, Ural Branch of Russian Academy of Sciences, Korolev str., 3, Perm, 614013, Russia.
authors.forename: Dmitriy
authors.initials: D
authors.lastname: Kisel'kov
authors.affiliation: Institute of Technical Chemistry, Ural Branch of Russian Academy of Sciences, Korolev str., 3, Perm, 614013, Russia.
authors.forename: Larisa
authors.initials: L
authors.lastname: Chekanova
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D000900:Anti-Bacterial Agents / Q000737:chemistry; D000891:Anti-Infective Agents, Local / Q000737:chemistry*; D060766:Drinking Water; D015195:Drug Design; D004926:Escherichia coli / Q000187:drug effects*; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry*; D008826:Microbial Sensitivity Tests; D053761:Nanocomposites / Q000737:chemistry*; D016062:Porosity; D012834:Silver / Q000737:chemistry*; D013212:Staphylococcus epidermidis / Q000187:drug effects*; D014871:Water Microbiology; D018508:Water Purification / Q000379:methods
chemical_list: D000900:Anti-Bacterial Agents; D000891:Anti-Infective Agents, Local; D060766:Drinking Water; D012834:Silver; D000537:Aluminum Oxide