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Preparation and Photoluminescence of ZnS:Mn2+/polystyrene Core-Shell Structures and ZnS:Mn2+ Hollow Spheres
Zhang Lixin1,2, Zhang Ren1, Wang Lin1, Zhou Chunming1, Jin Pu1, Chen Qianwang*1,2
1.Department of Chemistry,University of Science and Technology of China,Hefei 230026;2.Structure Research Laboratory, Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026
Abstract:
ZnS:Mn2+ polystyrene (PS) core-shell structures and ZnS:Mn2+ hollow spheres were prepared by a sonoehemical deposition approach. Transmission electron micrograph (TEM) studies show that the PS surface is covered by a thin shell consisted of ZnS: Mn2+ nanoparticles with an average size of 9 nm. ZnS: Mn2+ hollow spheres were obtained by heating the core-shell particles in air at 500 ℃ to drive off PS. The photoluminescence spectrum for the emission band of Mn2+ peaked at 540 nm, and a 45 nm blue shift compared to that of corresponding bulk sample, was discussed based on the Mn-O octahedral distortion induced by shell structure.
Key words:  ZnS: Mn2 + , Core-shell, Hollow sphere
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附件
ZnS:Mn2+/聚苯乙烯核壳及ZnS:Mn2+中空球的制备和光谱性质
张立新1,2, 张韧1, 王琳1, 周春明1, 金浦1, 陈乾旺*1,2
1.中国科学技术大学,化学系,合肥,230026;2.中国科学技术大学,中国科学院结构分析重点实验室,合肥,230026
摘要:
采用超声化学沉积法制备了ZnS:Mn2+/聚苯乙烯核壳结构和ZnS:Mn2+空心球.产物分别用透射电镜、X射线衍射仪和光致发光谱进行了表征.透射电镜结果表明,在聚苯乙烯胶体微球表面覆盖了平均尺寸为9 nm的ZnS:Mn2+纳米颗粒,X射线衍射结果进一步验证了这个结论.将核壳粒子在500℃灼烧除去PS核后,可以得到空心的ZnS:Mn2+微球,Mn2+的发射谱的峰位在540nm,与体相材料相比,蓝移了45 nm,这可能是由于壳层结构引起Mn-O八面体畸变,进而导致能带结构变化引起的.
关键词:  ZnS:Mn2+  核壳结构  中空球
DOI:10.1088/1674-0068/18/4/609-613
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