Premium
Hydrothermal Synthesis of Nanocrystalline Cerium(IV) Oxide Powders
Author(s) -
Hirano Masanori,
Kato Etsuro
Publication year - 1999
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1999.tb01838.x
Subject(s) - nanocrystalline material , crystallite , hydrothermal circulation , fluorite , cerium oxide , calcination , cerium , materials science , hydrothermal synthesis , nanocrystal , oxide , particle size , chemical engineering , inorganic chemistry , urea , nuclear chemistry , mineralogy , metallurgy , chemistry , nanotechnology , catalysis , organic chemistry , engineering
Nanocrystalline cerium(IV) oxide (CeO 2 ) powders were prepared by heating solutions of cerium(IV) salts in the presence of urea under hydrothermal conditions at 120° to 180°C. The effects of the concentration of urea and hydrothermal treatment temperature on the morphology and crystallite size of the synthesized particles were investigated. The synthesized particles were angular, ultrafine CeO 2 , with a cubic fluorite structure. Their crystallite size decreased from 20 to 10 nm with increasing urea concentration from 2 times to 8 times that of the Ce 4+ ion. The size only slightly changed by calcining at temperatures below 600°C.