| SiO2∶Sm粉体：溶胶-凝胶法制备及特殊荧光性能(英文) |
| Unique Photoluminescence in SiO2∶Sm Prepared by Sol-Gel Process |
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| 摘要: 采用溶胶-凝胶法制备SiO2∶Sm粉体，通过TG-DSC、FTIR、MAS-NMR、PL对材料的结构和性能进行测试表征。FTIR分析显示样品位于960 cm-1的吸收峰归属于Si-O-Sm键的变形振动，29Si MAS-NMR证实Sm3+进入SiO2网络结构。在380 nm入射光激发下样品产生除Sm3+特征发光以外的蓝绿荧光，对不同Sm3+掺量样品荧光性能进行对比分析，结果表明这种特殊的荧光发射与Si-O-Sm键的形成有关。 |
| 关键词: SiO2∶Sm 溶胶-凝胶 光致发光 Si-O-Sm键 |
| 基金项目: |
| Abstract: SiO2∶Sm powders prepared by the sol-gel process were structurally characterized by thermogravimetric-differential scanning calorimetry(TG-DSC), Fourier transform infrared(FTIR) spectraoscopy and 29Si magic angle spinning nuclear magnetic resonance(MAS-NMR). The peaks near 960 cm-1 in FTIR results are assigned to the deformation vibration of Si-O-Sm linkages, and the samarium ion has been incorporated into the framework of SiO2 as validated by 29Si MAS-NMR. Blue-green and red photoluminescence(PL) emission in structural disordered SiO2∶Sm powders was observed at room temperature with excitation at 380 nm. Study on the luminescence spectra of SiO2∶Sm powders with different doping concentrations of Sm3+ indicates that the generation of the special PL band is related to the formation of Si-O-Sm linkages. |
| Keywords: SiO2∶Sm sol-gel photoluminescence Si-O-Sm linkages |
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| 谭伟民,陆春华,倪亚茹,王晓钧,许仲梓.SiO2∶Sm粉体：溶胶-凝胶法制备及特殊荧光性能(英文)[J].无机化学学报,2009,25(4):635-640. |
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