期刊
DALTON TRANSACTIONS
卷 47, 期 16, 页码 5771-5779出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8dt00560e
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资金
- CNPq [141258/2014-4]
- Sao Paulo Research Foundation FAPESP [09/54082-2, 2013/07793-6]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [09/54082-2] Funding Source: FAPESP
CdFe2O4 nanoparticles of around 3.9 nm were synthesized using the coprecipitation method and protected by a silica layer. The nanoparticles were mixed with a coacervate and transformed into phosphate glasses with 1, 4 and 8% in mass of nanoparticles by the melt-quenching method. TEM images confirm that the nanoparticles were successfully incorporated into the matrix without inducing crystallization. P-31 NMR and Raman spectral analyses show that new P-O-Si bonds are formed in the glasses containing nanoparticles. The glass transition increases as a function of the nanoparticle content due to an increase in the connectivity of the phosphate glass chains. The UV-Vis spectra show bands at 415 and 520 nm assigned to Fe3+ ions and at 1025 nm, characteristic of Fe2+ ions, indicating that some of the nanoparticles dissolve during the melting process. The sample with 8% CdFe2O4 presents a paramagnetic behavior. The glasses obtained are transparent, non-hygroscopic and possess enormous thermal stability which is important for the production of optical devices.
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