摘要
以Stber反应为基础,制备了粒径为(900±50)nm的SiO2非晶型球形颗粒,产品粒径均匀、单分散性良好,以该SiO2颗粒为内部核层材料,采用均相沉淀法,通过三聚磷酸钠(Na5P3O10,TPP)的逐渐水解所生成的磷酸根与溶液中的稀土离子在价格低廉的SiO2表面定点沉积,生成了发绿光LnPO4(Ln=La:Ce,Tb)壳层,从而得到了SiO2-LnPO4核-壳结构材料。该核-壳结构颗粒粒径为(1.5±0.1)μm,具有明显的荧光性质,其最大荧光发射峰位于547nm处。由于内核材料不含稀土元素,且形貌规整,故该产品可降低稀土磷酸盐绿色荧光粉的合成成本,同时提高荧光粉的应用性能,在发光照明行业有着重要的应用前景。
Silica particles were synthesized based on the classical Stber reaction.These particles were non-crystalline solid granules with smooth surfaces and good monodispersity.The average size was （900±50） nm.While the rare earth ions combined with the free phosphate ions hydrolyzed by tripolyphosphate（TPP） on the surface of silica,the SiO2-LnPO4（Ln=La：Ce,Tb） core-shell particles were thus obtained by the homogeneous precipitation method and their size were （1.5±0.1） μm.The core-shell product had an obvious fluorescence property and the maximum fluorescent emission peak was at 547 nm.With no rare earth element in the core and with uniform morphology and size.This SiO2-LnPO4 material could decrease the synthetic cost and improve the application property of the LnPO4 green phosphor.This material might have an important application prospect in the illumination field.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2010年第10期963-967,共5页
Fine Chemicals
基金
国家自然科学基金项目(20871059)
江南大学科学研究基金项目(2009LYY04)
中央高校基本科研业务费专项资金(JUSRP20905)
国家大学生创新性实验计划项目(091029516)~~
关键词
二氧化硅
稀土磷酸盐
核-壳结构
荧光材料
silica
rare earth phosphate
core-shell structure
fluorescent material
