Core-shell structured silicate luminescent material and preparation method therefor

Example 1

Preparation of NaY0.99SiO4:0.01Tb3+@SiO2 by Sol-Gel Method

[0054]1) Preparation of SiO2 microsphere: 10 mL of water was placed in a beaker, followed by sequentially added therein 15 mL of anhydrous ethanol and 1 mL of ammonia water, and subjected to magnetic stirring to achieve homogenous, and dropwisely added therein 0.5 mL of tetraethylorthosilicate (TEOS) under magnetic stirring; after addition, reaction was stirred for 6 h to give a suspension of SiO2 microsphere containing impurities. The suspension of SiO2 microsphere containing impurities was then subjected to centrifugal separation spinning at 12000 rpm, rinsed with deionized water three times to remove surplus ammonia water and residual TEOS to give the SiO2 microsphere as precipitate. The thus prepared SiO2 microsphere was subjected to ultrasonic dispersion and redispersed in 10 mL of anhydrous ethanol to give a suspension of SiO2 microsphere.

[0055]2) Preparation of NaY0.99SiO4:0.01Tb3+@SiO2 core-shell luminescent mat

Example 2

Preparation of LiLa0.7SiO4:0.3Ce3+@SiO2 by Sol-Gel Method

[0056]1) Preparation of SiO2 microsphere: 20 mL of water was placed in a beaker, followed by sequentially added therein 50 mL of anhydrous ethanol and 7 mL of ammonia water, and subjected to magnetic stirring to achieve homogenous, and dropwisely added therein 3 mL of tetraethylorthosilicate (TEOS) under magnetic stirring; after addition, reaction was stirred for 2 h to give a suspension of SiO2 microsphere containing impurities. The suspension of SiO2 microsphere containing impurities was then subjected to centrifugal separation spinning at 12000 rpm, rinsed with deionized water three times to remove surplus ammonia water and residual TEOS to give the SiO2 microsphere as precipitate. The thus prepared SiO2 microsphere was subjected to ultrasonic dispersion and redispersed in 20 mL of anhydrous ethanol to give a suspension of SiO2 microsphere.

[0057]2) Preparation of LiLa0.7SiO4:0.3Ce3+@SiO2 core-shell luminescent materia

Example 3

Preparation of KLu0.4SiO4:0.5Gd3+, 0.05Eu3+, 0.05Tm3+@SiO2 by Sol-Gel Method

[0058]1) Preparation of SiO2 microsphere: 15 mL of water was placed in a beaker, followed by sequentially added therein 20 mL of anhydrous ethanol and 3 mL of ammonia water, and subjected to magnetic stirring to achieve homogenous, and dropwisely added therein 1.5 mL of tetraethylorthosilicate (TEOS) under magnetic stirring; after addition, reaction was stirred for 3 h to give a suspension of SiO2 microsphere containing impurities. The suspension of SiO2 microsphere containing impurities was then subjected to centrifugal separation spinning at 12000 rpm, rinsed with deionized water three times to remove surplus ammonia water and residual TEOS to give the SiO2 microsphere as precipitate. The thus prepared SiO2 microsphere was subjected to ultrasonic dispersion and redispersed in 15 mL of anhydrous ethanol to give a suspension of SiO2 microsphere.

[0059]2) Preparation of KLu0.4SiO4:0.5Gd3+, 0.05Eu3+, 0.05