TiO<sub>2</sub>-Based Hybrid Nanocomposites Modified by Phosphonate Molecules as Selective PAH Adsorbents
A robust sol-gel process was developed for the synthesis of surface-functionalized titania nanocrystallites bearing unsaturated groups starting from molecular heteroleptic single-source precursors. Molecules and nanomaterials were thoroughly characterized by multinuclear liquid and solid-state nucle...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2018-11-01
|
| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/23/11/3046 |
| _version_ | 1819205254716063744 |
|---|---|
| author | Nadine Bou Orm Quoc An Trieu Stephane Daniele |
| author_facet | Nadine Bou Orm Quoc An Trieu Stephane Daniele |
| author_sort | Nadine Bou Orm |
| collection | DOAJ |
| description | A robust sol-gel process was developed for the synthesis of surface-functionalized titania nanocrystallites bearing unsaturated groups starting from molecular heteroleptic single-source precursors. Molecules and nanomaterials were thoroughly characterized by multinuclear liquid and solid-state nuclear magnetic resonance (NMR), infra-red (FT-IR, DRIFT) spectroscopies. Nitrogen adsorption-desorption (BET), thermogravimetric (TG) and elemental analyses demonstrated the reliability and the fine tuning of the surface functionalization in terms of ratio TiO<sub>2</sub>:ligand. The as-prepared materials were used as nano-adsorbents to remove mixture of 16 polycyclic aromatic hydrocarbon (PAHs) from aqueous solutions. Adsorption kinetic experiments were carried out for 24 h in solutions of one PAH [benzo(a)pyrene, 220 ppb] and of a mixture of sixteen ones [220 ppb for each PAH]. Most kinetic data best fitted the pseudo-second order model. However, in PAHs mixture, a competition process took place during the first hours leading to a remarkable high selectivity between light and heavy PAHs. This selectivity could be fine-tuned depending on the nature of the unsaturated group of the phosphonate framework and on the nanomaterial textures. |
| first_indexed | 2024-12-23T04:48:47Z |
| format | Article |
| id | doaj.art-58a3a67a6309461c97294840312ac29d |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-12-23T04:48:47Z |
| publishDate | 2018-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-58a3a67a6309461c97294840312ac29d2022-12-21T17:59:32ZengMDPI AGMolecules1420-30492018-11-012311304610.3390/molecules23113046molecules23113046TiO<sub>2</sub>-Based Hybrid Nanocomposites Modified by Phosphonate Molecules as Selective PAH AdsorbentsNadine Bou Orm0Quoc An Trieu1Stephane Daniele2College of Natural and Health Sciences, Zayed University, 144534 Abu Dhabi, UAEInstitut de Recherches sur la Catalyse et l’Environnement de Lyon (IRCELYON), CNRS—UMR 5256, Université de Lyon, 2 Avenue Albert Einstein, F-69626 Villeurbanne CEDEX, FranceInstitut de Recherches sur la Catalyse et l’Environnement de Lyon (IRCELYON), CNRS—UMR 5256, Université de Lyon, 2 Avenue Albert Einstein, F-69626 Villeurbanne CEDEX, FranceA robust sol-gel process was developed for the synthesis of surface-functionalized titania nanocrystallites bearing unsaturated groups starting from molecular heteroleptic single-source precursors. Molecules and nanomaterials were thoroughly characterized by multinuclear liquid and solid-state nuclear magnetic resonance (NMR), infra-red (FT-IR, DRIFT) spectroscopies. Nitrogen adsorption-desorption (BET), thermogravimetric (TG) and elemental analyses demonstrated the reliability and the fine tuning of the surface functionalization in terms of ratio TiO<sub>2</sub>:ligand. The as-prepared materials were used as nano-adsorbents to remove mixture of 16 polycyclic aromatic hydrocarbon (PAHs) from aqueous solutions. Adsorption kinetic experiments were carried out for 24 h in solutions of one PAH [benzo(a)pyrene, 220 ppb] and of a mixture of sixteen ones [220 ppb for each PAH]. Most kinetic data best fitted the pseudo-second order model. However, in PAHs mixture, a competition process took place during the first hours leading to a remarkable high selectivity between light and heavy PAHs. This selectivity could be fine-tuned depending on the nature of the unsaturated group of the phosphonate framework and on the nanomaterial textures.https://www.mdpi.com/1420-3049/23/11/3046alkoxidesphosphonatestitaniananohybridsol-gelPAH adsorptionselectivity |
| spellingShingle | Nadine Bou Orm Quoc An Trieu Stephane Daniele TiO<sub>2</sub>-Based Hybrid Nanocomposites Modified by Phosphonate Molecules as Selective PAH Adsorbents Molecules alkoxides phosphonates titania nanohybrid sol-gel PAH adsorption selectivity |
| title | TiO<sub>2</sub>-Based Hybrid Nanocomposites Modified by Phosphonate Molecules as Selective PAH Adsorbents |
| title_full | TiO<sub>2</sub>-Based Hybrid Nanocomposites Modified by Phosphonate Molecules as Selective PAH Adsorbents |
| title_fullStr | TiO<sub>2</sub>-Based Hybrid Nanocomposites Modified by Phosphonate Molecules as Selective PAH Adsorbents |
| title_full_unstemmed | TiO<sub>2</sub>-Based Hybrid Nanocomposites Modified by Phosphonate Molecules as Selective PAH Adsorbents |
| title_short | TiO<sub>2</sub>-Based Hybrid Nanocomposites Modified by Phosphonate Molecules as Selective PAH Adsorbents |
| title_sort | tio sub 2 sub based hybrid nanocomposites modified by phosphonate molecules as selective pah adsorbents |
| topic | alkoxides phosphonates titania nanohybrid sol-gel PAH adsorption selectivity |
| url | https://www.mdpi.com/1420-3049/23/11/3046 |
| work_keys_str_mv | AT nadinebouorm tiosub2subbasedhybridnanocompositesmodifiedbyphosphonatemoleculesasselectivepahadsorbents AT quocantrieu tiosub2subbasedhybridnanocompositesmodifiedbyphosphonatemoleculesasselectivepahadsorbents AT stephanedaniele tiosub2subbasedhybridnanocompositesmodifiedbyphosphonatemoleculesasselectivepahadsorbents |