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| Articolul precedent |
| Articolul urmator |
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 250 12 |
| Ultima descărcare din IBN: 2024-03-29 12:20 |
| Căutarea după subiecte similare conform CZU |
| 53.043 (6) |
| Физика (1738) |
 SM ISO690:2012BEDHOUCHE, Fatiha, DJOUADI, Djamel, SOUALAH, Ahcane, CHELOUCHE, Azeddine, TOUAM, Tahar. Characterizations of pure and eu-doped ZnO aerogels nanostructures elaborated by a modified sol gel process. In: Moldavian Journal of the Physical Sciences, 2023, nr. 1, pp. 63-74. ISSN 1810-648X. DOI: https://doi.org/10.53081/mjps.2023.22-1.04 |
| EXPORT metadate: Google Scholar Crossref CERIF DataCite Dublin Core |
| Moldavian Journal of the Physical Sciences | ||||||
| Numărul 1 / 2023 / ISSN 1810-648X /ISSNe 2537-6365 | ||||||
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| DOI:https://doi.org/10.53081/mjps.2023.22-1.04 | ||||||
| CZU: 53.043 | ||||||
| Pag. 63-74 | ||||||
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| Rezumat | ||||||
Herein we report on the structural and optical properties of pure and Eu-doped (3% at.) ZnO aerogels nanostructures (ZnO-ans) synthesized by sol-gel associated with drying at supercritical conditions of isopropanol (254 °C, 54 bars). The samples were investigated using X-ray diffraction (XRD), SEM, UV-visible spectroscopy, FTIR and photoluminescence (PL). XRD studies exhibit the formation of a high crystal quality ZnO wurtzite hexagonal structure. The UV-visible measurements point out that the absorption intensity and the band gap energy increase after Eu-doping. FTIR analysis confirms the formation of ZnO phase and reveals a shift toward longer wavenumber of the Zn-O absorption band after Eu -doping. SEM images show that Eu3+ ions lead to change the morphology of ZnO crystalline from pastille to sphere. PL measurements reveal a decrease of UV luminescence intensity and an increase of the visible one due to Eu-doping. |
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| Cuvinte-cheie ZnO, Eu-doping, supercritical isopropanol, structure, morphology, photoluminescence. |
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