ZnO clusters encapsulated inside micropores of zeolites studied by UV Raman and laser-induced luminescence spectroscopies
文献类型：期刊论文
| 作者 | Chen, J; Feng, ZC; Ying, PL; Li, C |
| 刊名 | journal of physical chemistry b
 |
| 出版日期 | 2004-08-26 |
| 卷号 | 108期号:34页码:12669-12676 |
| 产权排序 | 1;1 |
| 英文摘要 | using microporous zeolites as host, sub-nanometric zno clusters were prepared in the micropores of the host by the incipient wetness impregnation method. a small amount of sub-nanometric zno clusters were introduced into the channels of hzsm-5 zeolite, whereas a large quantity of sub-nanometric zno clusters can be accommodated in the supercages of hy zeolite and no macrocrystalline zno exists on the extra surface of the hy material. the vibrations of the zeolite framework and zno were characterized by uv raman spectroscopy. the optical properties of these zno clusters were studied by uv-visible absorption spectroscopy and laser-induced luminescence spectroscopy. it is found that there are strong host-guest interactions between the framework oxygen atoms of zeolite and zno clusters influencing the motions of the framework oxygen atoms. the interaction may be the reason why zno clusters are stabilized in the pores of zeolites. different from bulk zno materials, these sub-nanometric zno clusters exhibit their absorption onset below 265 nm and show a purple luminescence band (centered at 410-445 nm) that possesses high quantum efficiency and quantum size effect. this purple luminescence band most likely originates from the coordinatively unsaturated zn sites in sub-nanometric zno clusters. on the other hand, the differences in the pore structure between hzsm-5 and hy zeolites cause the absorption edge and the purple luminescence band of zno clusters in zno/hzsm-5 show a red shift in comparison with those of zno clusters in zno/hy. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, physical |
| 研究领域[WOS] | chemistry |
| 关键词[WOS] | zinc-oxide nanoparticles ; semiconductor clusters ; optical-properties ; molecular-sieves ; coke formation ; si/al ratio ; particles ; electron ; photoluminescence ; transition |
| 收录类别 | SCI |
| 原文出处 | true |
| 语种 | 英语 |
| WOS记录号 | WOS:000223430800010 |
| 公开日期 | 2010-11-30 |
| 源URL | [http://159.226.238.44/handle/321008/83415]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catal, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, J,Feng, ZC,Ying, PL,et al. ZnO clusters encapsulated inside micropores of zeolites studied by UV Raman and laser-induced luminescence spectroscopies[J]. journal of physical chemistry b,2004,108(34):12669-12676. |
| APA | Chen, J,Feng, ZC,Ying, PL,&Li, C.(2004).ZnO clusters encapsulated inside micropores of zeolites studied by UV Raman and laser-induced luminescence spectroscopies.journal of physical chemistry b,108(34),12669-12676. |
| MLA | Chen, J,et al."ZnO clusters encapsulated inside micropores of zeolites studied by UV Raman and laser-induced luminescence spectroscopies".journal of physical chemistry b 108.34(2004):12669-12676. |
入库方式： OAI收割
来源：大连化学物理研究所
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