SYNTHESIS AND CHARACTERIZATION OF ZNO MICROCRYSTAL TUBES
Zinc oxide microcrystal tubes were prepared by using H(2)0(2)-activated Zn powder and active carbón as raw materials. The prepared samples were characterized by powder X-ray diffraction, scanning electrón microscopy and fluorescence spectrophotometer. The results indícate that ZnO microcrystal has t...
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| Autores principales: | , , , |
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| Lenguaje: | English |
| Publicado: |
Sociedad Chilena de Química
2008
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| Materias: | |
| Acceso en línea: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000300014 |
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| Sumario: | Zinc oxide microcrystal tubes were prepared by using H(2)0(2)-activated Zn powder and active carbón as raw materials. The prepared samples were characterized by powder X-ray diffraction, scanning electrón microscopy and fluorescence spectrophotometer. The results indícate that ZnO microcrystal has tubular structure with large slenderness ratio, and hexagonal cross sections for both intine and ectotheca. When excitated at 380 nm, two photoluminescence bands of ZnO microcrystal tubes appear, one is a strong emission at 383 nm (near UV band-edge) and the other a broad green emission band centered at 500 nm. The intensity of green emission peak is far weaker than that of near UV band-edge emission peak, which suggests low defect density and fine quality of the product |
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