Immobilization of TiO<sub>2</sub> Semiconductor Nanoparticles onto Posidonia Oceanica Fibers for Photocatalytic Phenol Degradation
A new composite photocatalyst called POF/TiO<sub>2</sub> was prepared from commercial P25 TiO<sub>2</sub> and <i>Posidonia oceanica</i> fibers (POF), a biomaterial collected from Tunisia’s beach. The composite material was prepared by a classical sol-gel synthesis...
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| Main Authors: | , , , , |
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| Format: | article |
| Language: | EN |
| Published: |
MDPI AG
2021
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| Subjects: | |
| Online Access: | https://doaj.org/article/ea7f5622f5e34a46a15d9ee91d9f37e0 |
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| Summary: | A new composite photocatalyst called POF/TiO<sub>2</sub> was prepared from commercial P25 TiO<sub>2</sub> and <i>Posidonia oceanica</i> fibers (POF), a biomaterial collected from Tunisia’s beach. The composite material was prepared by a classical sol-gel synthesis and was characterized by different methods. SEM images show a TiO<sub>2</sub> layer formed on top of the fibers, which was verified by XRD and XPS. Diffuse reflectance UV-vis spectroscopy shows that the layer has the same optical properties (Eg = 3.0 eV) as bulk P25. The photodegradation of phenol as a model compound was studied under different operating conditions using POF/TiO<sub>2</sub> and the results show degradation efficiencies between 4% (100 ppm) and 100% (<25 ppm) after 4 h of UV-C light irradiation (254 nm) using a POF/TiO<sub>2</sub> concentration of about 1 g/L. The composite material showed good stability and could be recycled up to three times. |
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