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Luminescence studies of decomposition of ceric sulfate
Author(s) -
Bakane M. A.,
Joshi C. P.,
Moharil S. V.,
Muthal P. L.,
Dhopte S. M.
Publication year - 2011
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.1269
Subject(s) - decomposition , thermal decomposition , sulfate , luminescence , monoclinic crystal system , chemistry , inorganic chemistry , phase (matter) , oxide , materials science , organic chemistry , crystal structure , optoelectronics
Literature results on the decomposition products of ceric sulfate are inconsistent. A group of researchers claim that ceric sulfate decomposed to ceric oxide without going through a cerous phase at any stage, while the results of the other group show that cerous sulfate is formed as an intermediate phase. Most of these studies used DTA/TGA, XRD and IR techniques. Cerous compounds can also be detected by the characteristic luminescence of Ce 3+ . Using such techniques we show that the thermal decomposition of both monoclinic and β Ce(SO 4 ) 2 ·4H 2 O in air at 500°C leads to the formation of cerous sulphate. Use of various atmospheres (air/N 2 /vacuum) and temperature profiles for the decomposition by the different researchers may be responsible for the discrepancies between literature results. Copyright © 2011 John Wiley & Sons, Ltd.