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Na(1-x)Lix(Gd0.39Y0.39Yb0.2Er0.02)F4 (0 ≤ x ≤ 1) Solid Solution Microcrystals: Li/Na Ratio-Induced Transition of Crystalline Phase and Morphology and Their Enhanced Upconversion Emission
- Source :
- Crystal Growth & Design. 18:6581-6590
- Publication Year :
- 2018
- Publisher :
- American Chemical Society (ACS), 2018.
-
Abstract
- Na(1-x)Lix(Gd0.39Y0.39Yb0.2Er0.02)F4 (0 ≤ x ≤ 1) (denoted as Na(1-x)LixReF4) solid solution microcrystals with different microstructures have been synthesized by a facile hydrothermal method. The influences of Li+ ion concentration on the morphology, crystal structure, grain size, and upconversion emission of the microcrystals are deeply investigated. It is found that the substitution concentration of Li+ not only causes the phase transition but also induces variation in morphology and size. When the substitution concentration of Li+ ions is lower (x ≤ 0.3), the obtained Na(1-x)LixReF4 microcrystals possess hexagonal structure and exhibit hexagonal prism in morphology. Whereas at the higher substitution concentration of Li+ ions (x ≥ 0.6), the crystalline phase of the final Na(1-x)LixReF4 microcrystals transformed into tetragonal structure and their morphology changed into octahedron except for the sample Na(1-x)LixReF4 with x = 0.9. Predictably, the obtained Na(1-x)LixReF4 microcrystals at the moderate s...
- Subjects :
- Hexagonal prism
Materials science
02 engineering and technology
General Chemistry
Crystal structure
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Photon upconversion
0104 chemical sciences
Ion
Crystallography
Tetragonal crystal system
Octahedron
Phase (matter)
General Materials Science
0210 nano-technology
Solid solution
Subjects
Details
- ISSN :
- 15287505 and 15287483
- Volume :
- 18
- Database :
- OpenAIRE
- Journal :
- Crystal Growth & Design
- Accession number :
- edsair.doi...........cdd9b668d1248a6e5ad9f1fbad229e5b