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Mesoscale Organization of Flower‐Like La 2 O 2 CO 3 and La 2 O 3 Microspheres
Author(s) -
Sun Chunwen,
Xiao Guoliang,
Li Hong,
Chen Liquan
Publication year - 2007
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.1551-2916.2007.01756.x
Subject(s) - calcination , materials science , mesoporous material , porosity , thermal stability , hydrothermal circulation , chemical engineering , lanthanum , mineralogy , microsphere , catalysis , chemistry , inorganic chemistry , composite material , biochemistry , engineering
Well‐dispersed spherical lanthanum oxycarbonate (La 2 O 2 CO 3 ) and La 2 O 3 particles with a flower‐like morphology were synthesized via a simultaneous polymerization–precipitate reaction, metamorphic reconstruction, and mineralization under a hydrothermal condition as well as subsequent calcination. The La 2 O 2 CO 3 and La 2 O 3 microspheres obtained consist of about 20 or 40 nm thick nanosheets as petals, respectively. They have an open three‐dimensional mesoporous and hollow structure and possess a high surface area, large pore volume, and marked thermal stability. These novel porous structural lanthanum‐based materials could be used as catalyst supports for many reactions.