摘要
采用离子液体超声辅助合成了CdSe纳米颗粒,用荧光分光光度计对纳米颗粒进行了表征。XRD结果显示,产物具有立方晶系结构,随着反应时间的增加,产物的结晶度逐渐提高。讨论了[Bmim]OH-H2O离子液体、反应时间对产物的形貌以及荧光性能的影响。在1 mL[Bmim]OH-H2O溶液中,超声反应1 h,所得产物的直径约为30～60 nm,荧光强度达到54 a.u.以上。离子液体在纳米颗粒表面形成一种保护膜,有效地阻止了颗粒间的团聚,提高了产物的荧光性能。
CdSe nanoparticles have been prepared by ultrasonic assisted ionic liquid method and characterized by means of XRD,SEM and fluorescence spectroscopy.XRD spectrum indicates that the product is a cubic phase of well-crystallized CdSe and its crystallinity increases with reaction time increasing.The effects of ionic liquid of OH-H2O and reaction time on the microstructure and fluorescence of CdSe were studied.The diameter of CdSe nanoparticles synthesized in 1 mL OH-H2O solution（ultrasonic irradiation,1 h） is 30～60 nm and their fluorescence intensity reaches 54 a.u..The fluorescence of CdSe nanoparticles could be enhanced by the method of coating these nanoparticles with ionic liquid to prevent inter-particle aggregation.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2012年第5期434-437,457,共5页
Fine Chemicals
基金
四川省科技支撑项目(2009GZ0038)~~
关键词
离子液体
超声辅助制备
纳米硒化镉
荧光性能
功能材料
ionic liquid
ultrasonic-assisted synthesis
CdSe nanoparticles
fluorescence
functional materials
