Mesoporous pyrophyllite–titania nanocomposites: synthesis and activity in phenol photocatalytic degradation
| Autor: | Oscar González-Díaz, Elisenda Pulido Melián, Abdelali El Gaidoumi, Brahim El Bali, José M. Doña-Rodríguez, José Antonio Navío, Abdelhak Kherbeche |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Nanocomposite medicine.diagnostic_test 010405 organic chemistry Infrared spectroscopy General Chemistry 010402 general chemistry 01 natural sciences Exfoliation joint 0104 chemical sciences Spectrophotometry Specific surface area visual_art medicine Photocatalysis visual_art.visual_art_medium Mesoporous material Nuclear chemistry Pyrophyllite |
| Zdroj: | Research on Chemical Intermediates. 45:333-353 |
| ISSN: | 1568-5675 0922-6168 |
| Popis: | Pyrophyllite–TiO2 nanocomposite PTi750 was successfully synthesized using a sol–gel method at ambient temperature based on exfoliation of the pyrophyllite layered clay by incorporation of the TiO2 precursor titanium(IV) t-butoxide. PTi750 exhibited higher photocatalytic activity in phenol degradation compared with commercial TiO2 Aeroxide P25. Ag-photodeposited PTi750 was more photoactive than PTi750, exhibiting detoxification, total degradation, and good mineralization of polluted solution and excellent stability after five reuses at optimal conditions in terms of the parameters pH, H2O2 concentration, and photocatalyst amount. The nanocomposites were investigated using several techniques, viz. diffuse-reflectance ultraviolet–visible (UV–Vis) spectrophotometry, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction analysis, X-ray fluorescence spectroscopy, Fourier-transform infrared spectroscopy, and Brunauer–Emmett–Teller (BET) specific surface area measurements. |
| Databáze: | OpenAIRE |
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