作业帮4.Conclusion
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/20 03:06:12
4.Conclusion
In summary,nanocrystalline (1−x/2)TiO2•(x/2)Eu2O3 phosphors have been synthesized by surfactant-aided reverse micelles and solvothermal synthetic method.The crystalline phase obtained from both mixtures and nanocomposites was anatase type of TiO2 and the average particle size,measured by TEM,has been changed as a function of Eu concentration.The nanocomposites were supposed to be the nanostructure of TiO2 shell with locally concentrated Eu2O3 cores and the emissions from 5D0:Eu3+ were found in the sample having Eu2O3 aggregate in TiO2 matrix.The emission band centered at 614 nm due to the transition from 5D0 to 7F2 level was strong.Regardless of the change of excitation wavelength,Eu concentration,and temperature of the nanoparticles,the bandwidth and the wavelength of emission spectra were identical.It is suggested that the Eu3+ ions radiating the luminescence are under the same environment in the TiO2 nanoparticles.
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In summary,nanocrystalline (1−x/2)TiO2•(x/2)Eu2O3 phosphors have been synthesized by surfactant-aided reverse micelles and solvothermal synthetic method.The crystalline phase obtained from both mixtures and nanocomposites was anatase type of TiO2 and the average particle size,measured by TEM,has been changed as a function of Eu concentration.The nanocomposites were supposed to be the nanostructure of TiO2 shell with locally concentrated Eu2O3 cores and the emissions from 5D0:Eu3+ were found in the sample having Eu2O3 aggregate in TiO2 matrix.The emission band centered at 614 nm due to the transition from 5D0 to 7F2 level was strong.Regardless of the change of excitation wavelength,Eu concentration,and temperature of the nanoparticles,the bandwidth and the wavelength of emission spectra were identical.It is suggested that the Eu3+ ions radiating the luminescence are under the same environment in the TiO2 nanoparticles.
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4.结论
在摘要,nanocrystalline(1?x/2)TiO2?(x/2)Eu2O3 磷光质已经被表面活性剂综合-援助了反面的 micelles 和 solvothermal 合成物质方法.被从混合和奈米复合材料获得的水晶的状态是 TiO2 和被 TEM 测量的平均的粒子大小的 anatase 类型,已经被改变如一个 Eu 集中的功能.奈米复合材料应该用地方性集中的 Eu2O3 核心是 TiO2 贝壳的奈米结构和来自 5D0 的散发:Eu3 在样品中被发现在 TiO2 点阵式让 Eu2O3 聚集.由于转变,从 5D0 to 7F2 水平在 614个 nm 集中的散发乐团是强壮的.不管奈米粒子的刺激波长、 Eu 集中和温度的变化,带宽和散发频谱的波长是同一的.它被建议放射无热光的 Eu3 离子在 TiO2 奈米粒子的相同环境之下.
在摘要,nanocrystalline(1?x/2)TiO2?(x/2)Eu2O3 磷光质已经被表面活性剂综合-援助了反面的 micelles 和 solvothermal 合成物质方法.被从混合和奈米复合材料获得的水晶的状态是 TiO2 和被 TEM 测量的平均的粒子大小的 anatase 类型,已经被改变如一个 Eu 集中的功能.奈米复合材料应该用地方性集中的 Eu2O3 核心是 TiO2 贝壳的奈米结构和来自 5D0 的散发:Eu3 在样品中被发现在 TiO2 点阵式让 Eu2O3 聚集.由于转变,从 5D0 to 7F2 水平在 614个 nm 集中的散发乐团是强壮的.不管奈米粒子的刺激波长、 Eu 集中和温度的变化,带宽和散发频谱的波长是同一的.它被建议放射无热光的 Eu3 离子在 TiO2 奈米粒子的相同环境之下.