NANOSIZED CU/ ZNO CATALYTIC SYSTEMS – CHARACTERIZATION AND ACTIVITY TOWARD OZONE DECOMPOSITION
Katya I. Milenova, Ivalina A. Avramova, Penko M. Nikolov
Pagini: 462-471
Publicat: 1 Jan 2013
Vizualizări: 365
Descărcări: 50
Rezumat: Nanosized doped with low concentrations of copper ZnO samples were synthesized using precipitation method. The samples were characterized by XRD, AAS, IR, XPS and EPR, the specific surface area was determined by BET. The X-ray diffraction analysis of the samples give evidence for the formation of wurtzite phase ZnO. The determined dopant contents in the investigated samples are 0.010 and 0.034 wt. %. The calculated mean size of the crystallites is in the range of 40 ÷ 43 nm. The presence of 2+ Cu ions is confirmed by EPR analysis. XPS investigations show that probably the ZnO is in the oxygen deficient state. The catalytic activity of the samples with the time for ozone decomposition was investigated and moderate deactivation was observed. The increase of the Cu content in ZnO samples leads to enhancement of their catalytic activities.
Cuvinte cheie: zno catalysts, copper doping, ozone decomposition
Citează acest articol: Katya I. Milenova, Ivalina A. Avramova, Penko M. Nikolov. NANOSIZED CU/ ZNO CATALYTIC SYSTEMS – CHARACTERIZATION AND ACTIVITY TOWARD OZONE DECOMPOSITION. Journal of International Scientific Publications: Materials, Methods & Technologies 7, 462-471 (2013). https://www.scientific-publications.net/en/article/1003127/
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