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合肥工业大学 材料科学与工程学院, 安徽 合肥 230009
收稿:2009-08-17,
修回:2009-11-11,
网络首发:2010-08-27,
纸质出版:2010-08-27
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王雷燕, 徐光青, 郑治祥. 纳米Zn<sub>2</sub>SiO<sub>4</sub> ∶ Mn包覆SiO<sub>2</sub> 颗粒的制备及表征[J]. 发光学报, 2010,31(4): 543-548
WANG Lei-yan, XU Guang-qing, ZHENG Zhi-xiang. Preparation and Optical Characterization of SiO<sub>2</sub> Particles Coated with Nanosized Zn<sub>2</sub>SiO<sub>4</sub> ∶ Mn[J]. 发光学报, 2010,31(4): 543-548
王雷燕, 徐光青, 郑治祥. 纳米Zn<sub>2</sub>SiO<sub>4</sub> ∶ Mn包覆SiO<sub>2</sub> 颗粒的制备及表征[J]. 发光学报, 2010,31(4): 543-548 DOI:
WANG Lei-yan, XU Guang-qing, ZHENG Zhi-xiang. Preparation and Optical Characterization of SiO<sub>2</sub> Particles Coated with Nanosized Zn<sub>2</sub>SiO<sub>4</sub> ∶ Mn[J]. 发光学报, 2010,31(4): 543-548 DOI:
采用水热合成方法添加KOH在SiO
2
颗粒表面包覆Mn
2+
掺杂纳米Zn
SiO
4
通过X射线衍射(XRD)仪、扫描电子显微镜(SEM)、能谱、光致发光(PL)光谱仪对产物的晶体结构、形貌及光学性能进行表征
并对Zn
晶体在水热反应过程中的反应机制进行了讨论。XRD测试结果表明:220 ℃水热条件下
添加少量KOH
反应不同时间后
可在石英砂表面生成一层Zn
;SEM照片显示所生成的Zn
为六棱柱形
并且不同反应条件下Zn
的包覆程度不同。反应产物经光致发光性能研究表明:Mn
包覆SiO
样品中显示两套光致发光谱
一套为250 nm左右激发产生的522 nm绿色发光带
另一套为340~410 nm宽带激发的440 nm蓝色发光带
前者为典型的Mn
离子发光
后者440 nm发光带则有可能来源于基体SiO
的氧空位缺陷。
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