title: Ozone decomposition on Ag/SiO2 and Ag/clinoptilolite catalysts at ambient temperature.
abstract: Silver modified zeolite (Bulgarian natural clinoptilolite) and Ag/silica catalysts were synthesized by ion exchange and incipient wet impregnation method respectively and characterized by different techniques. DC arc-AES was used for Ag detection. XRD spectra show that Ag is loaded over the surface of the SiO(2) sample and that after the ion-exchange process the HEU type structure of clinoptilolite is retained. UV-VIS (specific reflection at 310 nm) and IR (band at 695 cm(-1)) spectroscopy analysis proved that silver is loaded as a T-atom into zeolite channels as Ag(+), instead of Na(+), Ca(2+), or K(+) ions, existing in the natural clinoptilolite form. The samples Ag/SiO(2) and Ag-clinoptilolite were tested as catalysts for decomposition of gas phase ozone. Very high catalytic activity (up to 99%) was observed and at the same time the catalysts remained active over time at room temperature.
authors.affiliation: Institute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria. Electronic address: penmail@mail.bg.
authors.forename: Penko
authors.initials: P
authors.lastname: Nikolov
authors.affiliation: Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
authors.forename: Krassimir
authors.initials: K
authors.lastname: Genov
authors.affiliation: Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
authors.forename: Petya
authors.initials: P
authors.lastname: Konova
authors.affiliation: Institute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
authors.forename: Katya
authors.initials: K
authors.lastname: Milenova
authors.affiliation: Institute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
authors.forename: Todor
authors.initials: T
authors.lastname: Batakliev
authors.affiliation: Institute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
authors.forename: Vladimir
authors.initials: V
authors.lastname: Georgiev
authors.affiliation: Laboratory of Industrial Chemistry, Process Chemistry Centre, Åbo Akademi University, Biskopsgatan 8, 20500 Åbo/Turku, Finland.
authors.forename: Narendra
authors.initials: N
authors.lastname: Kumar
authors.affiliation: School of Pharmacy and Biomolecular Sciences, University of Brighton, Lewes Road, Brighton BN2 4GJ, UK.
authors.forename: Dipak K
authors.initials: DK
authors.lastname: Sarker
authors.affiliation: University of Chemical Technology and Metallurgy, 1756 Sofia, Bulgaria.
authors.forename: Dimitar
authors.initials: D
authors.lastname: Pishev
authors.affiliation: Institute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
authors.forename: Slavcho
authors.initials: S
authors.lastname: Rakovsky
mesh_terms: D002384:Catalysis; D010126:Ozone / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013696:Temperature; D017641:Zeolites / Q000737:chemistry*
chemical_list: C083175:clinoptilolite; D017641:Zeolites; D012834:Silver; D010126:Ozone; D012822:Silicon Dioxide