Changing width bandgap of TiO2 nanoparticles incorporating GO
| Autor: | Marina Vega-González, Daniela K. Calvo-Ramos, Francisco de Moure-Flores, José Santos-Cruz, S.A. Mayén-Hernández |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Oxide Nanoparticle 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound symbols.namesake law General Materials Science Photodegradation Sol-gel Graphene Mechanical Engineering 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences chemistry Mechanics of Materials Titanium dioxide symbols Photocatalysis 0210 nano-technology Raman spectroscopy Nuclear chemistry |
| Zdroj: | MRS Advances. 4:3423-3431 |
| ISSN: | 2059-8521 |
| DOI: | 10.1557/adv.2020.7 |
| Popis: | Nanoparticles of titanium dioxide (TiO2), synthesized by the sonochemical technique, were mixed with different amounts of graphene oxide (GO), obtained by the improved method of Hummer, in order to modify their bandwidth. The TiO2/OG compounds were characterized using different techniques: X-ray Diffraction (XRD), transmission electron microscopy (TEM), Raman and UV-Vis-NIR spectroscopy. TiO2 bandgap decreased, with GO incorporation, from 3.2 to 2.72 eV when GO was present at 20 weigh percentage (TiO2/GO-20%). Photodegradation experiments of methylene blue (MB) were performed with the materials to verify their photocatalytic activity. At 40 minutes, the pure TiO2 degraded 48% of MB, whereas the compound TiO2/GO-20% degraded 88%, showing a good incorporation of both compounds and the improvement of TiO2 photocatalitic properties. |
| Databáze: | OpenAIRE |
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