摘要
以Pr(NO_3)_3、Sm(NO_3)_3、Na_2MoO_4·2H2O、SrCl_2·6H_2O为原料,采用化学共沉淀法,通过控制掺杂稀土离子的比例和煅烧温度制得一系列的以SrMoO_4为基质的荧光体粉末。XRD结果表明,稀土离子的掺杂量为9%时不会引起基质结构的改变。荧光光谱分析表明,在煅烧温度为800℃时样品的发光性能最好。固定激发波长为λ_(ex)=250 nm,Pr^(3+)在486,619,645 nm处有一组较强的发射峰,对应于Pr^(3+)的~3H_4→~3P_0、~3P_0→~3H_6、~3P_0→~3F_2的跃迁。Sm^(3+)发射光谱中位于566,601,648 nm发射峰,分别对应于Sm^(3+)的~4G_(5/2)→~6H_(5/2),~4G_(5/2)→~6H_(7/2),~4G_(5/2)→~6H_(9/2)的跃迁。
A series of novel Pr^（3＋）/ Sm^（3＋） Co-doped Sr MoO_4 phosphors synthesized by chemical co-precipitation at different temperature and different doping concentration of rare earth ions were prepared from the raw materials： Pr（NO_3）_3,Sm（NO_3）_3,Na_2MoO_4·2H2O,SrCl_2·6H_2O（ all those are of analytical grade）. XRD results show that the doping amount of rare earth ions is not caused by changes in matrix structure of 9%. And the light-emitting properties of the samples is best when the calcination temperature is 800 ℃. The excitation spectra of the Sr_（1. 0- x）MoO_4： x Pr^（3＋）phosphor monitored at 250 nm. It can be find that there are five peaks,including two weak peak and three relatively strong peak. These three peaks are located at 486,619,645 nm corresponding to the ~3H_4→~3P_0、~3P_0→~3H_6、~3P_0→~3F_2. The emission spectra of the Sr_（1. 0- x）MoO_4： x Sm^（3＋） were located at about 566,601 and 648 nm,corresponding to ~4G_（5/2）→~6H_（5/2）,~4G_（5/2）→~6H_（7/2）,~4G_（5/2）→~6H_（9/2）,respectively.
出处
《应用化工》
CAS
CSCD
北大核心
2016年第1期26-29,34,共5页
Applied Chemical Industry
基金
国家自然科学基金(21501203)
河南省科技厅资助项目(132102310296)
河南省高等学校重点科研项目(15A430055)
分析化学重点学科资助
关键词
钼酸锶
化学共沉淀法
发光材料
稀土离子
SrMoO_4
chemical co-precipitation
luminescent material
rare earth ions
