title: Solar-photocatalytic disinfection of Vibrio cholerae by using Ag@ZnO core-shell structure nanocomposites.
abstract: Disinfection of Gram-negative bacterium Vibrio cholerae 569B in aqueous matrix by solar-photocatalysis mediated by Ag@ZnO core-shell structure nanocomposite particles was investigated. Silver nanoparticles are synthesized by the reduction of silver perchlorate followed by precipitation of zinc oxide shell and are employed in the photocatalytic disinfection of the model pathogen. Effect of photocatalyst loading and reaction temperature on the disinfection kinetics was studied. Disinfection efficiency in laboratory as well as real water samples was compared with that of pure-ZnO and TiO2 (Degussa P25). Nanocomposite system has shown optimum disinfection (≈98%) at 40-60min of sun-light exposure with a catalyst loading of 0.5mg/L of the reaction solution. The reduction of aquatic bacterial densities by photocatalytically active Ag@ZnO core-shell nanocomposite in presence of natural sun-light may have potential ex situ application in water decontamination at ambient conditions.
authors.affiliation: School of Biotechnology, KIIT University, Bhubaneswar 751024, India.
authors.forename: Sourav
authors.initials: S
authors.lastname: Das
authors.affiliation: School of Biotechnology, KIIT University, Bhubaneswar 751024, India.
authors.forename: Sayantan
authors.initials: S
authors.lastname: Sinha
authors.affiliation: School of Biotechnology, KIIT University, Bhubaneswar 751024, India; Center of Industrial Technology, KIIT University, Bhubaneswar 751024, India.
authors.forename: Mrutyunjay
authors.initials: M
authors.lastname: Suar
authors.affiliation: Department of Food Science & Technology, Chonbuk National University, Jeonju 561756, South Korea.
authors.forename: Soon-Il
authors.initials: SI
authors.lastname: Yun
authors.affiliation: School of Biotechnology, KIIT University, Bhubaneswar 751024, India; Center of Industrial Technology, KIIT University, Bhubaneswar 751024, India. Electronic address: amritamishrabio@gmail.com.
authors.forename: Amrita
authors.initials: A
authors.lastname: Mishra
authors.affiliation: School of Biotechnology, KIIT University, Bhubaneswar 751024, India; Center of Industrial Technology, KIIT University, Bhubaneswar 751024, India. Electronic address: tripathy.suraj@gmail.com.
authors.forename: Suraj K
authors.initials: SK
authors.lastname: Tripathy
mesh_terms: D002384:Catalysis; D004203:Disinfection; D007700:Kinetics; D008027:Light; D053761:Nanocomposites / Q000737:chemistry* / Q000633:toxicity; D017382:Reactive Oxygen Species / Q000737:chemistry; D012834:Silver / Q000737:chemistry*; D013696:Temperature; D014734:Vibrio cholerae / Q000187:drug effects / Q000528:radiation effects; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D017382:Reactive Oxygen Species; D012834:Silver; D015034:Zinc Oxide