Kalampaliki, Theodora, Makri, Sofia P, Papadaki, Evanthia, Grigoropoulos, Alexios 
ORCID: 0000-0002-3108-7052, Zoikis Karathanasis, Alexandros and Deligkiozi, Ioanna
(2021)
Visible-Light Active Sulfur-Doped Titania Nanoparticles Immobilized on a Silica Matrix: Synthesis, Characterization and Photocatalytic Degradation of Pollutants.
NANOMATERIALS, 11 (10).
2543-.
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Visible-Light Active Sulfur-Doped Titania Nanoparticles Immobilized on a Silica Matrix Synthesis, Characterization and Photo.pdf - Published version Download (3MB) | Preview |
Abstract
The photocatalytic oxidation (PCO) of pollutants using TiO<sub>2</sub>-based materials can significantly improve indoor air quality (IAQ), which in turn, has a significant impact on human health and life expectancy. TiO<sub>2</sub>-based nanoparticles (NPs) are widely used as part of building materials to function as photocatalysts in PCO. In this work, a series of sulfur-doped TiO<sub>2</sub> NPs immobilized on a silica matrix were synthesized by combining a sol-gel process with ball milling. The samples were structurally characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), Fourier-transform infrared spectroscopy (FT-IR) and N<sub>2</sub> adsorption-desorption isotherms. Furthermore, the morphological characteristics were determined by dynamic light scattering (DLS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The photocatalytic activity of the as prepared S-doped TiO<sub>2</sub>/SiO<sub>2</sub> NPs in the degradation of liquid and air pollutants under visible-light irradiation was investigated. Our results show that sulfur is an effective dopant for activating TiO<sub>2</sub>/SiO<sub>2</sub> photocatalysts under visible-light irradiation. Silica constitutes a "safe-by-design" approach and inhibits the aggregation of NPs during synthesis. The most efficient photocatalyst afforded 79% removal of methyl orange (5 h), 26% removal of acetaldehyde (1 h) and 12% oxidation of NO (1 h).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | photocatalysis, S-doping, TiO2 nanoparticles, SiO2, MO degradation, NOx oxidation, safe by design |
| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 09 Dec 2021 17:13 |
| Last Modified: | 03 Feb 2024 09:53 |
| DOI: | 10.3390/nano11102543 |
| Open Access URL: | https://www.mdpi.com/2079-4991/11/10/2543 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3145102 |
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