Synthesis, characterization and environmental application of silica grafted photoactive substances isolated from urban biowaste
| Autor: | Paola Avetta, Maria Laura Tummino, Maria Luisa Testa, Giuliana Magnacca, Alessandra Bianco Prevot, Silvia Agostini, Enzo Montoneri, Francesca Deganello |
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| Rok vydání: | 2015 |
| Předmět: |
Thermogravimetric analysis
Materials science General Chemical Engineering Infrared spectroscopy 02 engineering and technology 010402 general chemistry 01 natural sciences Adsorption Organic chemistry Chemical Engineering (all) urban waste photoactive material Fourier transform infrared spectroscopy Photodegradation Porosity Aqueous solution Small-angle X-ray scattering Chemistry (all) General Chemistry 021001 nanoscience & nanotechnology 6. Clean water 0104 chemical sciences heterogeneous catalysis Chemical engineering 0210 nano-technology |
| Zdroj: | RSC Adv. RSC advances 5 (59) (2015): 47920–47927. doi:10.1039/C5RA03164H info:cnr-pdr/source/autori:Maria Luisa Testa, Maria Laura Tummino, Silvia Agostini, Paola Avetta, Francesca Deganello, Enzo Montoneri, Giuliana Magnacca, Alessandra Bianco Prevot/titolo:Synthesis, characterization and environmental application of silica grafted photoactive substances isolated from urban biowaste/doi:10.1039%2FC5RA03164H/rivista:RSC advances/anno:2015/pagina_da:47920/pagina_a:47927/intervallo_pagine:47920–47927/volume:5 (59) |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c5ra03164h |
| Popis: | A waste-derived photoactive substance sourced from the green fraction of urban refuses (CVT230) was immobilized on different types of silica support, one amorphous and the other two with controlled porosity (HMS and SBA). In this fashion, three hybrid systems were obtained, which contained CVT230 as an insoluble photoactive component. They were tested in the photodegradation of 4-methylphenol in aqueous solution irradiated by simulated solar light and results showed that they are able to promote the total photodegradation of the pollutant. The materials, both before and after irradiation, were characterized by high-resolution transmission electron microscopy (TEM), small angle X-ray scattering (SAXS), N2 gas-volumetric adsorption, infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The SBA silica hybrid system showed the best performance in terms of stability and reusability, after multiple irradiation cycles. This behaviour can be correlated to the silica morphology and texture, being capable to better allocate and stabilize the CVT230 molecules. |
| Databáze: | OpenAIRE |
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