| 244 | 7 | 9 |
| 下载次数 | 被引频次 | 阅读次数 |
采用溶胶-凝胶法并结合后续700～1000℃热处理制备Ce3+、B3+共掺纳米SiO2材料。用X射线衍射(X-ray diffraction,XRD)、透射电子显微镜(transmission electron microscope,TEM)、X射线光电子能谱、紫外-可见吸收光谱仪(ultraviolet-visible spectrophotometry,UV-Vis)及荧光光谱仪表征材料的结构、形貌、成分、光吸收及光致发光性能。XRD及TEM分析结果表明:该纳米材料具有非晶态结构,一次颗粒尺寸为10nm左右。UV-Vis吸收光谱显示:共掺样品在紫外区有吸收峰,其主吸收峰位于225nm和260nm。荧光光谱分析显示,经过H2气氛处理的样品中存在两套光致发光谱:一套为258nm激发产生的363nm紫外发光;另一套为317nm激发产生的407nm的宽带发光。对比分析经过不同温度处理以及不同B3+掺量样品的发光光谱,初步探讨两发光峰的起源。
Abstract：Cerium and boron ions co-doped SiO2 nanoparticles were synthesized using the sol-gel method,and followed by heat treatment at different temperatures from 700 ℃to 1000℃.Thephase structure,morphology,component,optic absorption,and pho-toluminescence properties of products are measured using the X-ray diffraction apparatus(XRD) ,transmission electron microscope(TEM) ,X-ray photoelectron spectroscopy(XPS) ,ultraviolet-visible spectrophotometry,UV-Vis) adsorption spectroscopy,and fluo-rescence spectrum.The results of the XRD and TEM analysis show that the products are amorphous and the size is about 10 nm.The UV-Vis absorption patterns show that the Ce 3+ and B 3+ co-doped silica have strong absorption in the UV area,with the absorption peaks at 225 nm and 260 nm.Two luminescent bands exist in the products heat-treated in H2 ambience.One is a UV emission band with the wavelength at 363 nm excited at 258 nm,the other is a wide band with the maximum point at 407 nm when excited at 317 nm. The photoluminescence properties of the products heat-treated at different temperatures and with different concentration of B3 +are studied and the origins of the two bands discussed.
[1]FASOLI M,VEDDA A,LAURIA A,et al.Effect of reducing sintering atmosphere on Ce-doped sol-gel silica glasses[J].J Non-Crystal Solids,2009,355:1140-1144.
[2]REISFELD R,PATRA A,PANCZER G,et al.Spectroscopic properties of cerium in sol-gel glasses[J].Opt Mater,1999,13(1):81-88.
[3]KUNKELY H,VOGLER A.Optical metal-to-ligand charge transfer in tris(pyrazine-2-carboxylato)cerium(Ⅲ):Absorption and emission[J].J Photochem Photobio A:Chem,2002,151(1):45-47.
[4]PEPE A,APARICIA M,CERE S,et al.Preparation and characteriza-tion of cerium doped silica sol-gel coatings on glass and aluminum substrates[J].J Non-Cryst Solids,2004,348(15):162-171.
[5]SAKURAI Y.Oxygen-related red photoluminescence bands in silica glasses[J].J Non-Cryst Solids,2003,316(3):389-392.
[6]AEDDA A,CARBONARO C M,CLEMENTE F,et al.Ultraviolet excitation of photoluminescence of porous silica under vacuum condi-tions[J].J Non-Cryst Solids,2003,322(1):95-99.
[7]XU G Q,ZHENG Z X,TANG W M,et al.Multi-peak behavior of photoluminescence of silica particles heat-treated in hydrogen at elevated temperature[J].J Lumin,2007,126(1):43-47.
[8]XU G Q,ZHENG Z X,TANG W M,et al.Luminescence property of Ce3+doped silica decorated with S2-and Cl-anions[J].J Lumin,2007,126(2):475-480.
基本信息:
DOI：10.14062/j.issn.0454-5648.2010.03.002
中图分类号:O482.31
引用信息:
[1]徐光青,汤文明,郑治祥,等.Ce~(3+)及B~(3+)共掺杂纳米SiO_2的光致发光性能[J].硅酸盐学报,2010,38(03):440-445.DOI:10.14062/j.issn.0454-5648.2010.03.002.
基金信息:
高等学校博士学科点专项科研基金新教师课题(20070359030)资助项目
2010-03-15
2010-03-15