Treatment of saline produced water through photocatalysis using rGO-TiO2nanocomposites
| Autor: | Jordi Llorca, Giuseppe Vitiello, Raffaele Marotta, Francesc Medina, Sandra Contreras, Mario Andreozzi, Laura Clarizia, Mayra G. Álvarez |
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| Přispěvatelé: | Andreozzi, Mario, Álvarez, Mayra G., Contreras, Sandra, Medina, Francesc, Clarizia, Laura, Vitiello, Giuseppe, Llorca, Jordi, Marotta, Raffaele, Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Aigua -- Reutilització
Materials science Diffuse reflectance infrared fourier transform TiO2/rGO Fotocatàlisi Hydrophobic organic pollutant 02 engineering and technology Hydrophobic organic pollutants 010402 general chemistry 01 natural sciences Catalysis Hydrothermal circulation Saline produced water law.invention Catalysi Water reuse Enginyeria química [Àrees temàtiques de la UPC] Hydrophobic surfaces Photocatalysi law Photocatalysis Electron paramagnetic resonance Graphenic materials Nanocomposite Graphene Chemistry (all) General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Graphenic material Chemical engineering Transmission electron microscopy 0210 nano-technology Dispersion (chemistry) |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| Popis: | Graphene like-TiO2 nanocomposites (rGO-TiO2) are prepared via hydrothermal route by following different synthetic protocols. The as-prepared nanostructured materials exhibit higher photocatalytic activity than bare TiO2 in the treatment of synthetic produced water containing high salinity levels and different compositions of recalcitrant dissolved organic matter. The effect of the preparation method on the physico-chemical properties is assessed by performing a wide characterization combining different analyses, such as nitrogen physic-adsorption (BET), X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM), UV-VIS Diffuse Reflectance Spectroscopy (DRUV) and Electron Paramagnetic Resonance (EPR). The effect of several operative variables (i.e., TiO2/rGO weight ratios, and addition of hydrogen peroxide) on the photocatalytic activity is also critically evaluated. The highest photocatalytic activity is obtained for a rGO/TiO2 weight ratio of about 10%, for which a good compromise between uniformity of dispersion of the TiO2 particles on the rGO layers and covering degree of the titania photoactive surface is achieved. This study can contribute to open new perspectives in the design of high performance graphene like-based TiO2 photocatalysts for removing hydrophobic bio-recalcitrant pollutants from saline water. |
| Databáze: | OpenAIRE |
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