期刊
JOURNAL OF RARE EARTHS
卷 34, 期 7, 页码 661-666出版社
ELSEVIER
DOI: 10.1016/S1002-0721(16)60076-5
关键词
solid polymer electrolytes; natural polymers; photoluminescence spectroscopy; rare earths
资金
- Fundacao para a Ciencia e Tecnologia
- European Regional Development Fund (FEDER) [PEst-C/QUI/UI0686/2013]
- Human Potential Operational Programme/European Social Fund (POPH/FSE) [SFRH/BD/97232/2013]
- Sao Paulo Research Foundation (FAPESP)
- CNPq
- CAPES
- Fundação para a Ciência e a Tecnologia [SFRH/BD/97232/2013] Funding Source: FCT
Solid polymer electrolytes based on chitosan and europium triflate were prepared by solvent casting and characterized by X-ray diffraction, scanning electron microscopy (SEM), atomic force microscopy (AFM), and photoluminescence spectroscopy. The X-ray diffraction exhibited that the samples were essentially amorphous with organized regions over the whole range of the salt content studied. The AFM analysis demonstrated that the smoother sample had roughness of 4.39 nm. Surface visualization through SEM revealed good homogeneity without any phase separation for more conductive samples and the less conductive showed some imperfections on the surface. The emission and excitation spectra displayed the characteristic bands of Eu(CF3SO3)(3) in addition to broad bands corresponding to the polymer host. The excited state D-5(0) lifetime values ranged from 0.29-0.37 ms for the studied samples.
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