Use of Natural Rubber Membranes as Support for Powder TiO2and Ag/TiO2Photocatalysts
| Autor: | Renato F. Dantas, Sílvio C. de Oliveira, Jusinei Meireles Stropa, Amilcar Machulek, Alberto Adriano Cavalheiro, Lincoln Carlos Silva de Oliveira, Samuel L. Oliveira, Aline S. Herrero |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Diffuse reflectance infrared fourier transform Scanning electron microscope General Chemistry Thermogravimetry chemistry.chemical_compound Differential scanning calorimetry Membrane Natural rubber chemistry Chemical engineering visual_art Titanium dioxide visual_art.visual_art_medium Photocatalysis |
| Zdroj: | Journal of the Brazilian Chemical Society. |
| ISSN: | 0103-5053 |
| DOI: | 10.5935/0103-5053.20150293 |
| Popis: | The purpose of this study was to synthesize TiO2-polymer composites able to act as photocatalyst membranes. TiO2 catalysts were prepared using the sol-gel method to contain 0.0, 0.5, 1.0, and 2.0 wt.% of embedded Ag particles, subsequently incorporated into natural rubber latex at a weight fraction of 15%. Samples of these ceramic powders were suspended in a latex emulsion (natural rubber), cast in Petri dishes and slowly dried in an oven. The resulting materials were evaluated by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray, diffuse reflectance spectroscopy, differential scanning calorimetry, thermogravimetry, and photocatalytic assaying using methylene blue as an organic pollutant reference. All composite membranes exhibited good photoactivity conferred by TiO2 powder, with 98% dye fading after 300 min of ultraviolet irradiation. |
| Databáze: | OpenAIRE |
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