Ozone decomposition on Ag/SiO2 and Ag/clinoptilolite catalysts at ambient temperature

Penko Nikolov*, Krassimir Genov, Petya Konova, Katya Milenova, Todor Batakliev, Vladimir Georgiev, Narendra Kumar, Dipak K. Sarker, Dimitar Pishev, Slavcho Rakovsky

*Korresponderande författare för detta arbete

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

52 Citeringar (Scopus)

Sammanfattning

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 SiO2 sample and that after the ion-exchange process the HEU type structure of clinoptilolite is retained. UV-VIS (specific reflection at 310nm) and IR (band at 695cm-1) spectroscopy analysis proved that silver is loaded as a T-atom into zeolite channels as Ag+, instead of Na+, Ca2+, or K+ ions, existing in the natural clinoptilolite form. The samples Ag/SiO2 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.

OriginalspråkEngelska
Sidor (från-till)16-19
Antal sidor4
TidskriftJournal of Hazardous Materials
Volym184
Utgåva1-3
DOI
StatusPublicerad - dec 2010
MoE-publikationstypA1 Tidskriftsartikel-refererad

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