摘要
Monodisperse （Sr, Eu）CO3 sphere （the homogenous mixture of Sr2＋ and Eu3＋ carbonates） was firstly prepared, and then its surface was coated by amorphous SiO2 in the presence of cationic surfactant cetyltrimethylammonium bromide （CTAB） to form （Sr, Eu）CO3@SiO2 core-shell-like precursor. The overall synthesized mechanism was investigated and proposed based on the Fourier transform infrared spec- troscopy （FTIR）, X-ray diffraction （XRD） and scanning electron microscopy （SEM）. This strategy could be applied to construct core-shell structured precursors for the preparation of alkali earth silicate phosphors.
Monodisperse （Sr, Eu）CO3 sphere （the homogenous mixture of Sr2＋ and Eu3＋ carbonates） was firstly prepared, and then its surface was coated by amorphous SiO2 in the presence of cationic surfactant cetyltrimethylammonium bromide （CTAB） to form （Sr, Eu）CO3@SiO2 core-shell-like precursor. The overall synthesized mechanism was investigated and proposed based on the Fourier transform infrared spec- troscopy （FTIR）, X-ray diffraction （XRD） and scanning electron microscopy （SEM）. This strategy could be applied to construct core-shell structured precursors for the preparation of alkali earth silicate phosphors.
基金
supported by the National Hi-Tech R&D Program of China (863 Program, 2010AA03A404, 2011AA03A101)
Beijing Natural Science Foundation (2102022)
the Hong Kong Polytechnic University Grant (J-BB9R)
