Fabrication of PVA/Ag-TiO2 nanofiber mats for visible-light-active photocatalysis
| Autor: | Magdaleno R. Vasquez, Arantxa Danielle S. Montallana |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Vinyl alcohol Materials science Physics QC1-999 technology industry and agriculture General Physics and Astronomy Nanoparticle 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Nanomaterials chemistry.chemical_compound Wastewater chemistry Plasma reduction Nanofiber 0103 physical sciences Photocatalysis 0210 nano-technology Photodegradation Nuclear chemistry Visible spectrum Composites |
| Zdroj: | Results in Physics, Vol 25, Iss, Pp 104205-(2021) |
| ISSN: | 2211-3797 |
| Popis: | Visible-light-active nanomaterials for the photodegradation of organic compound in water were fabricated using facile techniques. In this work, anatase titanium dioxide (TiO2) nanoparticles (NPs) were coupled with plasma-reduced silver (Ag) to shift its sensitivity to visible light. The NPs were subsequently immobilized in electrospun poly(vinyl alcohol) (PVA). The PVA/Ag-TiO2 nanofiber mats (NFMs) were subjected to plasma etching to partially expose the embedded NPs and improve photosensitivity. The NFM sample exposed to oxygen plasma exhibited 51% removal of methylene blue in water under visible light irradiation. Compared to the untreated NFM sample, plasma treatment resulted to a 20% increase in dye removal efficiency. In addition, total organic carbon (TOC) analysis of fishpond wastewater using the NFMs under visible-light irradiation was conducted. With the NFMs, there was a 32% decrease in TOC concentration while in the absence of the catalyst, a 142% increase was measured. The results showed the effectivity of the catalysts to counter the biochemical reactions that took place in the actual wastewater samples. Moreover, the immobilization of visible-light-active Ag-TiO2 NPs in PVA would extend its service life as well as minimize its environmental risk, making the NFMs ideal for removing organic compounds in wastewater. |
| Databáze: | OpenAIRE |
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