Photocatalytic activity of Ag 3 PO 4 and some of its composites under non-filtered and UV-filtered solar-like radiation
| Autor: | Gustav Plesch, Ewa Dworniczek, Olivier Monfort, Leonid Satrapinskyy, Grażyna Gościniak, Katarína Baďurová |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Band gap Process Chemistry and Technology Silver phosphate Composite number UV filter 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Mineralization (biology) 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Materials Chemistry Ceramics and Composites Photocatalysis Phenol Composite material 0210 nano-technology Methylene blue |
| Zdroj: | Ceramics International. 43:3706-3712 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2016.11.217 |
| Popis: | Silver phosphate is a promising photocatalyst since its energy band gap is situated in the visible range ( E g ≈2.4 eV), thus this material is a potential candidate for replacing titania which is photoactive only under UV. However, Ag 3 PO 4 suffers of photocorrosion and therefore composites should be prepared to limit this detrimental effect. In this work, pure Ag 3 PO 4 and its composites with AgI, TiO 2 , and hydroxyapatite were prepared by using various methods. The photoactivity of the materials was evaluated by their ability to decolorize methylene blue and to mineralize phenol under non-filtered and UV-filtered artificial solar-like radiation. The use of UV cut-off filter enhanced the photocatalytic activity of pure silver phosphate by limiting the photocorrosion of silver(I) into Ag°. For composites with AgI and TiO 2 , despite their lower photoactivity compared to pure Ag 3 PO 4 , the efficiency in mineralization of phenol after repeated run is stabilized by using UV cut-off filter. On the other hand, the photocatalytic efficiency of Ag 3 PO 4 composites containing hydroxyapatite remained low mainly due to high absorption properties of hydroxyapatite. The photoactive samples showed excellent photoinduced antimicrobial properties where Gram-negative E. coli was more susceptible to photocatalytic deactivation than Gram-positive S. aureus (MRSA). |
| Databáze: | OpenAIRE |
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