High specific surface crown ether modified chitosan nanofiber membrane by low-temperature phase separation for efficient selective adsorption of lithium

2021 ◽  
Vol 262 ◽  
pp. 118312
Author(s):  
Qian Cheng ◽  
Yuzhe Zhang ◽  
Xudong Zheng ◽  
Wen Sun ◽  
BoTao Li ◽  
...  
Keyword(s):  
Phase Separation ◽  
Low Temperature ◽  
Crown Ether ◽  
Specific Surface ◽  
Selective Adsorption ◽  
Temperature Phase ◽  
Nanofiber Membrane ◽  
Modified Chitosan ◽  
Chitosan Nanofiber ◽  
Low Temperature Phase

Low temperature phase separation in CeSi1.86

1990 ◽  
Vol 5 (10) ◽  
pp. 2126-2132 ◽  
Author(s):  
R. Madar ◽  
E. Houssay ◽  
A. Rouault ◽  
J. P. Senateur ◽  
B. Lambert ◽  
...  
Keyword(s):  
Phase Separation ◽  
Low Temperature ◽  
Close Relation ◽  
Structure Type ◽  
Primary Phase ◽  
Second Phase ◽  
Temperature Phase ◽  
Transmission Electron ◽  
Two Phases ◽  
Low Temperature Phase

Samples of CeSi1.86 which exhibit Kondo behavior are shown by neutron powder diffraction and transmission electron microscopy to consist of two closely related tetragonal phases. The primary phase is of the ThSi2 structure type with some vacancies in the silicon sublattice. The second phase presents an ordering of these vacancies. These two phases coexist at low temperature, but the abundance of the second phase increases with decreasing temperature. Neutron diffraction measurements and TEM experiments show that the phase separation occurs reversibly around 260 K, in close relation with an anomaly in the transport properties. The presence of a hysteresis indicates that we are dealing with a first order transition.

The low-temperature phase separation in Pr0.5Ca0.5CoO3

2007 ◽  
Vol 316 (2) ◽  
pp. e728-e730 ◽  
Author(s):  
A. Chichev ◽  
J. Hejtmánek ◽  
Z. Jirák ◽  
K. Knížek ◽  
M. Maryško ◽  
...  
Keyword(s):  
Phase Separation ◽  
Low Temperature ◽  
Temperature Phase ◽  
Low Temperature Phase
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