ZnO/zeolite hybrid nanostructures: synthesis, structure, optical properties, and simulation

被引:10
作者
Chrissanthopoulos, A. [1 ,2 ]
Kyriazis, F. C. [1 ]
Nikolakis, V. [1 ,3 ]
Giannakopoulos, I. G. [1 ]
Dracopoulos, V. [1 ]
Baskoutas, S. [2 ]
Bouropoulos, N. [2 ]
Yannopoulos, S. N. [1 ,2 ]
机构
[1] Fdn Res & Technol Hellas, Inst Chem Engn Sci FORTH ICE HT, GR-26504 Patras, Greece
[2] Univ Patras, Dept Mat Sci, GR-26504 Rion, Greece
[3] Univ Delaware, Dept Chem & Biomol Engn, Catalysis Ctr Energy Innovat, Newark, DE 19702 USA
关键词
ZnO nanostructures; Zeolites; X-ray diffraction; Scanning electron microscopy; Photoluminescence; ZNO NANOSTRUCTURES; GROWTH; PHOTOLUMINESCENCE; MICROPORES; SEPARATION; NANOWIRES;
D O I
10.1016/j.tsf.2013.05.157
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Zinc oxide nanostructures were grown on zeolite substrates using a thermal evaporation method. Nanostructures were synthesized by varying the temperature of the reacting mixture, the temperature gradient between this and the substrate, the deposition time, and the presence/absence of Au catalyst on the zeolite substrate. Morphology, structure, and optical properties were investigated using X-ray diffraction, scanning electron microscopy, and photoluminescence spectroscopy. Systematic changes were observed in the amount, shape, and optical properties of the nanostructures grown on zeolite. Nanostructures grown at higher temperatures demonstrated more intense blue/green emission peaks associated with defects. In addition, ZnO nanostructures grown in the absence of Au catalysts were found to exhibit appreciably larger defect density in comparison to the structures grown on Au-coated surfaces. The presence of active sites on zeolite surface and their interaction with the zinc and oxygen species has been investigated using semi-empirical molecular orbital methods. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:21 / 27
页数:7
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