Chemistry Reference
In-Depth Information
Figure 1.7
TEM (a) and HRTEM (b) images of CeO
nanopolyhedra. TEM
2
(c) and HRTEM (d) images of CeO
2
nanorods; inset is a fast
Fourier transform (FFT) analysis. TEM (e) and HRTEM (f)
images of CeO
nanocubes; inset is a FFT analysis.
2
Nanoceria can also be directly prepared in appropriate
nonaqueous or mixed solvents, for example, ethanol [71, 72], CCl
,
and ethanol-water mixed solvents [73]. In a number of cases,
addictives like EDTA or fatty acids are found to play crucial roles
in controlling the crystallinity and morphology of the products.
Sun
4
. reported that with the assistance of ethylenediamine,
phase-pure ceria nanorods (40-50 nm in diameter and 0.3-2
et al
m in
length) were obtained in mixed solvents of ethanol and water [74].
Yang
ยต
. prepared high quality ceria nanocubes with strong self-
assembly tendency in a water-toluene system, with oleic acid as the
et al
