Colloidal titania-silica-iron oxide nanocomposites and the effect from silica thickness on the photocatalytic and bactericidal activities
| Autor: | Boosayarat Tomapatanaget, Padtaraporn Chanhom, Numpon Insin, Nisanart Charoenlap |
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| Rok vydání: | 2017 |
| Předmět: |
Anatase
Nanocomposite Materials science Iron oxide 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound chemistry Chemical engineering law Photocatalysis Calcination 0210 nano-technology Photodegradation Iron oxide nanoparticles Superparamagnetism |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 427:54-59 |
| ISSN: | 0304-8853 |
| Popis: | New types of colloidal multifunctional nanocomposites that combine superparamagnetic character and high photocatalytic activity were synthesized and investigated. The superparamagnetic nanocomposites composed of anatase titania, silica, and iron oxide nanoparticles (TSI) were synthesized using thermal decomposition method followed by microemulsion method, without calcination at high temperature. Different techniques including X-ray diffraction (XRD) and transmission electron microscope (TEM) were used to characterize and confirm the structure of the nanocomposites. These nanocomposites showed high photocatalytic activity when used in the photodegradation of methylene blue under irradiation with a black light lamp. Moreover, the nanocomposites exhibited high antibacterial properties. From our study, the nanocomposites can be useful in various applications such as removal of pollutants with readily separation from the environment using an external magnetic field. These composites could effectively photo-degrade the dye at least three cycles without regeneration. The effects of silica shell thickness on the photocatalytic activity was investigated, and the thickness of 6 nm of the silica interlayer is enough for the inhibition of electron translocation between titania and iron oxide nanoparticles and maintaining the efficiency of photocatalytic activity of titania nanoparticles. |
| Databáze: | OpenAIRE |
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