Document Type
Article
Source of Publication
Molecules
Publication Date
11-21-2018
Abstract
© 2018 by the authors. 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 TiO2: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.
DOI Link
ISSN
Publisher
MDPI AG
Volume
23
Issue
11
First Page
3046
Disciplines
Physical Sciences and Mathematics
Keywords
Alkoxides, Nanohybrid, PAH adsorption, Phosphonates, Selectivity, Sol-gel, Titania
Scopus ID
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
Bou Orm, Nadine; Trieu, Quoc An; and Daniele, Stephane, "TiO2-based hybrid nanocomposites modified by phosphonate molecules as selective PAH adsorbents" (2018). All Works. 3658.
https://zuscholars.zu.ac.ae/works/3658
Indexed in Scopus
yes
Open Access
yes
Open Access Type
Gold: This publication is openly available in an open access journal/series