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| MCM-41介孔分子筛光致发光机理的研究 | |
| 引用本文： | 葛树勋,何农跃,杨春,顾民,胡澄.MCM-41介孔分子筛光致发光机理的研究[J].东南大学学报(自然科学版),2004,34(4):504-506. |
| 作者姓名： | 葛树勋 何农跃 杨春 顾民 胡澄 |
| 作者单位： | 1. 东南大学分子与生物分子电子学教育部重点实验室,南京,210096 2. 南京师范大学化学与环境科学学院,南京,210097 3. 南京大学固体微结构国家重点实验室,南京,210093 |
| 基金项目： | 南京大学校科研和教改项目，教育部跨世纪优秀人才培养计划 |
| 摘 要： | 乙二胺水溶液作为碱介质合成得到纯硅MCM-41母体,然后分别于813,1 073和1 323 K温度下焙烧.结果表明,813 K焙烧后的MCM-41显示最强的光致发光强度,而1 073和1 323 K焙烧的样品仅具有微弱的光致发光效应.29 Si MAS 核磁共振(NMR)结果证实了高温焙烧后硅羟基含量降低.与此同时,骨架红外(IR)谱中氧空位缺陷带消失.证实了MCM-41的光致发光强度随焙烧温度升高而下降是受硅羟基含量和氧空位缺陷带的影响. |
| 关 键 词： | 光致发光 缺陷 |
| 文章编号： | 1001-0505(2004)04-0504-03 |
Investigation on photoluminescence mechanism of MCM-41 |
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| Ge Shuxun,He Nongyue,Yang Chun,Gu Min,Hu Cheng.Investigation on photoluminescence mechanism of MCM-41[J].Journal of Southeast University(Natural Science Edition),2004,34(4):504-506. | |
| Authors: | Ge Shuxun He Nongyue Yang Chun Gu Min Hu Cheng |
| Institution: | Ge Shuxun 1 He Nongyue 1 Yang Chun 2 Gu Min 3 Hu Cheng 3 |
| Abstract: | As synthesized mobil catalytic material 41 (MCM 41) sample was synthesized in an ethylenediamine aqueous medium. It is shown that MCM 41 calcined at 813 K ex hibits strongest photoluminescent (PL) intensity while those calcined at 1 073 K and 1 323 K only exhibit a weak photoluminescent effect. 29 Si MAS nuclear magnetic resonance (NMR) spectroscopy demonstrates that the contents of silanol decreases as the calcine temperature increases. Meanwhile the oxyge n related defect sites disappear in infrared (IR) spectrum after high temperat ure calcination. It is proved that both the oxygen related defect sites and si lanol contents are responsible for the strong PL effect of the investigated MCM 41 samples. |
| Keywords: | MCM-41 NMR |
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