Open AccessCatalytic Property of Double Layered Perovskites A2MM’O6 for Radiolytical Split of Water
Author(s) -
Alexandru Cecal,
Tudor Lupaşcu,
Oana Roxana Hauta,
Ioana Aurelia Gorodea,
Mircea Nicolae Palamaru,
Alexandra Raluca Iordan,
Ada Macovei
Publication year - 2009
Publication title -
chemistry journal of moldova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.275
H-Index - 5
eISSN - 2345-1688
pISSN - 1857-1727
DOI - 10.19261/cjm.2009.04(1).02
Subject(s) - radiolysis , yield (engineering) , chemistry , catalysis , radiochemistry , mass spectrometry , radiation dose , nuclear chemistry , metallurgy , materials science , organic chemistry , aqueous solution , chromatography , medicine , nuclear medicine
This paper deals with a study of water splitting by gamma rays in the presence of some double perovskites A2MM’O6 and also Sr2Fe1-xTa1+xO6. The irradiation is performed using 60Co as a source with 3·104 Ci activity and 8.3 kGy/h dose rate, which simulated the radioactive wastes, resulted from reprocessing of spent nuclear fuel elements much more active: 108-109 Ci. The stable products of radiolysis, as well as the other chemical species are measured by mass spectrometry. The calculated radiation yield (GH2) generally decreases in the order: Sr2Fe1-xTa1+xO6 (x=0.5; 0.4; 0.3; 0.1) > Ca2AlTaO6 > Sr2AlTaO6 > Ba2AlTaO6, under the given experimental conditions; the yield was higher in the presence of these catalysts than in their absence.