Luminescence of Binary-Doped Silica Aerogel Powders: A Two-Step Sol-Gel Approach
In this study, we report a novel synthesis of hydrophobic silica aerogel powder composites, functionalized and binary-doped with [Tb(phen)<sub>2</sub>](NO<sub>3</sub>)<sub>3</sub> and [Eu(phen)<sub>2</sub>](NO<sub>3</sub>)<sub>3</s...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Gels |
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| Online Access: | https://www.mdpi.com/2310-2861/10/2/104 |
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| author | Dimitar Shandurkov Nina Danchova Tony Spassov Vesselin Petrov Stoyan Gutzov |
| author_facet | Dimitar Shandurkov Nina Danchova Tony Spassov Vesselin Petrov Stoyan Gutzov |
| author_sort | Dimitar Shandurkov |
| collection | DOAJ |
| description | In this study, we report a novel synthesis of hydrophobic silica aerogel powder composites, functionalized and binary-doped with [Tb(phen)<sub>2</sub>](NO<sub>3</sub>)<sub>3</sub> and [Eu(phen)<sub>2</sub>](NO<sub>3</sub>)<sub>3</sub> nanocrystals, employing a two-step sol-gel methodology. The investigation delves into the structural elucidation, optical properties and thermal conductivity of these functionalized Tb(III)-Eu(III) composites. Our analysis includes diffuse reflectance spectra and excitation and luminescence spectra, highlighting the quantum yields of composites with varying chemical compositions. Remarkably, these samples exhibit a strong luminescence, with distinct hues of red or green based on the specific doping type and level. The detailed examination of excitation spectra and quantum yields establishes robust energy-transfer mechanisms from the 1,10-phenanthroline molecule to the lanthanide ions. Notably, our study uncovers a Tb<sup>3</sup>⁺→Eu<sup>3</sup>⁺ energy-transfer phenomenon within the binary functionalized samples, providing compelling evidence for a structural formation process occurring within the mesoporous framework of the aerogel powders. |
| first_indexed | 2024-03-07T22:32:01Z |
| format | Article |
| id | doaj.art-c7ef187a829249c9b269033ff3f02376 |
| institution | Directory Open Access Journal |
| issn | 2310-2861 |
| language | English |
| last_indexed | 2024-03-07T22:32:01Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Gels |
| spelling | doaj.art-c7ef187a829249c9b269033ff3f023762024-02-23T15:17:27ZengMDPI AGGels2310-28612024-01-0110210410.3390/gels10020104Luminescence of Binary-Doped Silica Aerogel Powders: A Two-Step Sol-Gel ApproachDimitar Shandurkov0Nina Danchova1Tony Spassov2Vesselin Petrov3Stoyan Gutzov4Faculty of Chemistry and Pharmacy, Sofia University St. Kliment Ohridski, 1164 Sofia, BulgariaFaculty of Chemistry and Pharmacy, Sofia University St. Kliment Ohridski, 1164 Sofia, BulgariaFaculty of Chemistry and Pharmacy, Sofia University St. Kliment Ohridski, 1164 Sofia, BulgariaFaculty of Chemistry and Pharmacy, Sofia University St. Kliment Ohridski, 1164 Sofia, BulgariaFaculty of Chemistry and Pharmacy, Sofia University St. Kliment Ohridski, 1164 Sofia, BulgariaIn this study, we report a novel synthesis of hydrophobic silica aerogel powder composites, functionalized and binary-doped with [Tb(phen)<sub>2</sub>](NO<sub>3</sub>)<sub>3</sub> and [Eu(phen)<sub>2</sub>](NO<sub>3</sub>)<sub>3</sub> nanocrystals, employing a two-step sol-gel methodology. The investigation delves into the structural elucidation, optical properties and thermal conductivity of these functionalized Tb(III)-Eu(III) composites. Our analysis includes diffuse reflectance spectra and excitation and luminescence spectra, highlighting the quantum yields of composites with varying chemical compositions. Remarkably, these samples exhibit a strong luminescence, with distinct hues of red or green based on the specific doping type and level. The detailed examination of excitation spectra and quantum yields establishes robust energy-transfer mechanisms from the 1,10-phenanthroline molecule to the lanthanide ions. Notably, our study uncovers a Tb<sup>3</sup>⁺→Eu<sup>3</sup>⁺ energy-transfer phenomenon within the binary functionalized samples, providing compelling evidence for a structural formation process occurring within the mesoporous framework of the aerogel powders.https://www.mdpi.com/2310-2861/10/2/104aerogel powdersluminescenceeuropiumterbiumenergy transferthermal conductivity |
| spellingShingle | Dimitar Shandurkov Nina Danchova Tony Spassov Vesselin Petrov Stoyan Gutzov Luminescence of Binary-Doped Silica Aerogel Powders: A Two-Step Sol-Gel Approach Gels aerogel powders luminescence europium terbium energy transfer thermal conductivity |
| title | Luminescence of Binary-Doped Silica Aerogel Powders: A Two-Step Sol-Gel Approach |
| title_full | Luminescence of Binary-Doped Silica Aerogel Powders: A Two-Step Sol-Gel Approach |
| title_fullStr | Luminescence of Binary-Doped Silica Aerogel Powders: A Two-Step Sol-Gel Approach |
| title_full_unstemmed | Luminescence of Binary-Doped Silica Aerogel Powders: A Two-Step Sol-Gel Approach |
| title_short | Luminescence of Binary-Doped Silica Aerogel Powders: A Two-Step Sol-Gel Approach |
| title_sort | luminescence of binary doped silica aerogel powders a two step sol gel approach |
| topic | aerogel powders luminescence europium terbium energy transfer thermal conductivity |
| url | https://www.mdpi.com/2310-2861/10/2/104 |
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