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

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 photoluminescenc...

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Detalles Bibliográficos
Autores principales: Lu, Qingshan, Wang, Zhongying, Li, Jiangong, Wang, Peiyu, Ye, Xialei
Formato: Texto
Lenguaje:English
Publicado: Springer 2009
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2894238/
https://www.ncbi.nlm.nih.gov/pubmed/20596369
http://dx.doi.org/10.1007/s11671-009-9294-x
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author Lu, Qingshan
Wang, Zhongying
Li, Jiangong
Wang, Peiyu
Ye, Xialei
author_facet Lu, Qingshan
Wang, Zhongying
Li, Jiangong
Wang, Peiyu
Ye, Xialei
author_sort Lu, Qingshan
collection PubMed
description 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–SiO(2)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.
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spelling pubmed-28942382010-06-30 Structure and Photoluminescent Properties of ZnO Encapsulated in Mesoporous Silica SBA-15 Fabricated by Two-Solvent Strategy Lu, Qingshan Wang, Zhongying Li, Jiangong Wang, Peiyu Ye, Xialei Nanoscale Res Lett Nano Express 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–SiO(2)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. Springer 2009-03-21 /pmc/articles/PMC2894238/ /pubmed/20596369 http://dx.doi.org/10.1007/s11671-009-9294-x Text en Copyright © 2009 to the authors
spellingShingle Nano Express
Lu, Qingshan
Wang, Zhongying
Li, Jiangong
Wang, Peiyu
Ye, Xialei
Structure and Photoluminescent Properties of ZnO Encapsulated in Mesoporous Silica SBA-15 Fabricated by Two-Solvent Strategy
title Structure and Photoluminescent Properties of ZnO Encapsulated in Mesoporous Silica SBA-15 Fabricated by Two-Solvent Strategy
title_full Structure and Photoluminescent Properties of ZnO Encapsulated in Mesoporous Silica SBA-15 Fabricated by Two-Solvent Strategy
title_fullStr Structure and Photoluminescent Properties of ZnO Encapsulated in Mesoporous Silica SBA-15 Fabricated by Two-Solvent Strategy
title_full_unstemmed Structure and Photoluminescent Properties of ZnO Encapsulated in Mesoporous Silica SBA-15 Fabricated by Two-Solvent Strategy
title_short Structure and Photoluminescent Properties of ZnO Encapsulated in Mesoporous Silica SBA-15 Fabricated by Two-Solvent Strategy
title_sort structure and photoluminescent properties of zno encapsulated in mesoporous silica sba-15 fabricated by two-solvent strategy
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2894238/
https://www.ncbi.nlm.nih.gov/pubmed/20596369
http://dx.doi.org/10.1007/s11671-009-9294-x
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