Structure and Photoluminescent Properties of ZnO Encapsulated in Mesoporous Silica SBA-15 Fabricated by Two-Solvent Strategy

被引：76
作者：
Lu, Qingshan [1 ]
Wang, Zhongying [1 ]
Li, Jiangong [1 ]
Wang, Peiyu [1 ]
Ye, Xialei [1 ]
机构：
[1] Lanzhou Univ, Inst Mat Sci & Engn, Lanzhou 730000, Peoples R China
来源：
NANOSCALE RESEARCH LETTERS | 2009年 / 4卷 / 07期
基金：
中国国家自然科学基金;
关键词：
ZnO; Clusters; Mesoporous silica; Photoluminescence; THIN-FILMS; ROOM-TEMPERATURE; NANOWIRES; TEMPLATE; CLUSTERS; COPOLYMER; TRIBLOCK; PORES; RAMAN; SIO2;
D O I：
10.1007/s11671-009-9294-x
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The two-solvent method was employed to prepare ZnO encapsulated in mesoporous silica (ZnO/SBA-15). The prepared ZnO/SBA-15 samples have been studied by X-ray diffraction, transmission electron microscope, X-ray photoelectron spectroscopy, nitrogen adsorption-desorption isotherm, and photoluminescence spectroscopy. The ZnO/SBA-15 nanocomposite has the ordered hexagonal mesostructure of SBA-15. ZnO clusters of a high loading are distributed in the channels of SBA-15. Photoluminescence spectra show the UV emission band around 368 nm, the violet emission around 420 nm, and the blue emission around 457 nm. The UV emission is attributed to band-edge emission of ZnO. The violet emission results from the oxygen vacancies on the ZnO-SiO2 interface traps. The blue emission is from the oxygen vacancies or interstitial zinc ions of ZnO. The UV emission and blue emission show a blue-shift phenomenon due to quantum-confinement-induced energy gap enhancement of ZnO clusters. The ZnO clusters encapsulated in SBA-15 can be used as light-emitting diodes and ultraviolet nanolasers.
引用
收藏
页码：646 / 654
页数：9
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