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zirconyl chloride were used as Ce and Zr source, respectively, and
nitric acid as the peptizing agent. They also employed the nanocasting
technique to prepare a range of mesoporous Ce
Zr
O
beads, using
1-
x
x
2
polymeric porous beads as the hard template [5].
a
b
c
d
Figure
1.2
(a, b) TEM and HRTEM images of the ceria nanorods; (c,
d) TEM and HRTEM images of the ceria pearl-chain-like
nanostructures.
) are a class of materials of
great importance in catalysis and luminescence fields. Wakefield
Rare earth sesquioxides (RE
O
2
3
et
al
. developed a colloidal precipitation route to prepare Eu
O
and
2
3
Y
:Eu nanoparticles [6, 7]. The luminescent properties of these
materials were also examined. Oxide nanotubes of Er, Tm, Yb, Lu
were synthesized by Yada
O
2
3
. by the method of homogeneous
precipitation with dodecylsulfate assemblies as templates [8]. These
nanotubes can be further tailored to compose hierarchical 2D and
3D microstructures [9].
Rare earth fluorides generally exhibit good thermal stabilities
and high ionic nature, and find applications primarily in solid-state
lasers, lighting, and display. Pure and doped rare earth fluorides
et al
