摘要
利用单层十六烷基三甲基溴化铵(CTAB)表面活性剂包覆染料并将其转相到水中,通过溶胶-凝胶法制备以荧光染料为核、介孔二氧化硅纳米粒子(MSNs)为壳的荧光介孔二氧化硅纳米粒子。利用DLS探讨了正硅酸乙酯、表面活性剂、氨水、染料浓度对粒子粒径的影响,利用SEM、TEM、TG、UV、PL光谱分析手段对复合纳米粒子结构、形貌、热稳定性、光谱进行了表征和探讨。结果表明,随着正硅酸乙酯和氨水用量增多,粒子粒径增加;表面活性剂用量较少时粒径会较大;染料浓度较低时对粒径影响较小;制备出的粉体可以在100nm左右可控;荧光强度提高、染料与二氧化硅最佳掺杂质量比为1.5×10-3;由于是物理包覆所以热稳定性提高有限,但抗紫外耐老化性有显著的提高。
Using single hexadecyl trimethyl ammonium bromide （CTAB） surfactant coat dye and transfer it into the water, and preparing fluorescent dye for nuclear, mesoporous silica nanoparticles（MSNs） for shell of fluorescent mesoporous silica nanoparticles by sol-gel method. DLS was used to study the influence of tetraethyl orthosilicate, surfactant, ammonia, dye concentration on the particle size, using SEM, TEM, TG, UV and PL spectra characterize and discusses composite nanoparticles structure, morphology, thermal stability and optical. The results show that with the increase of the tetraethyl orthosilicate and ammonia, the particle size increases; the particle size will be larger when in large amount surfactant; its size will be less affected at lower dye concentrations. The preparation of the particle can be controlled around 100 nm; Fluorescence intensity increase and the optimal doping mass ratio of dye and silicon dioxide is 1.5 × 10-3 ; thermal stability improve limited due to the physical coat and ultraviolet aging resistance is signifi- cantly improved.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2016年第8期18-23,共6页
Materials Reports
关键词
介孔二氧化硅
荧光染料
溶胶-凝胶法
有机/无机复合荧光材料
mesoporous silica, fluorescent dyes, sol-gel method, organic/inorganic composite fluorescent material
