Photocatalytic activity of Ag3PO4 and some of its composites under non-filtered and UV-filtered solar-like radiation |
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| Affiliation: | 1. Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovicova 6, Mlynska Dolina, 842 15 Bratislava IV, Slovakia;2. Department of Experimental Physics, Faculty of Mathematics Physics and Informatics, Comenius University in Bratislava, Mlynska Dolina, 842 48 Bratislava IV, Slovakia;3. Department of Microbiology, Wroclaw Medical University, 50 368 Wroclaw, Poland;1. Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, 84215 Bratislava, Slovakia;2. Department of Microbiology, Wroclaw Medical University, 50368 Wroclaw, Poland;3. STU Centre for Nanodiagnostics, Slovak University of Technology, 81243 Bratislava, Slovakia;4. Department of Chemical Engineering, University of Patras, 26500 Patras, Greece;5. Institute of Materials Science, Faculty of Materials Science and Technology, Slovak University of Technology, 91724 Trnava, Slovakia;1. Universidade Católica Portuguesa, CBQF Centro de Biotecnologia e Química Fina—Associate Laboratory, Escola Superior Biotecnologia, Porto, Portugal;2. Chemistry Department, University College London, London, United Kingdom;3. Department of Materials and Ceramic Engineering/CICECO—Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal;4. School of Engineering and Materials Science, Queen Mary University of London, London, United Kingdom;1. Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, 842 15 Bratislava, Slovakia;2. Department of Microbiology, Wroc?aw Medical University, Chalubinskiego 4, 50-368 Wroclaw, Poland;3. Department of Experimental Physics, Faculty of Mathematics, Physics and Informatics, Comenius University, 842 48 Bratislava, Slovakia;4. Institute of Materials Science, Faculty of Materials Science and Technology, Slovak University of Technology, Paulínska 16, Trnava, Slovakia;1. Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152-8552, Japan;2. International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 3-13 Sakura, Ibaraki 305-0003, Japan;3. Device & Materials Laboratory, Fujitsu Laboratories Ltd., 10-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0197, Japan;4. Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152-8551, Japan;1. Department of Nanoscience and Technology, Bharathiar University, Coimbatore, India;2. Department of Physics, Government Arts College, Coimbatore, India |
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| Abstract: | Silver phosphate is a promising photocatalyst since its energy band gap is situated in the visible range (Eg≈2.4 eV), thus this material is a potential candidate for replacing titania which is photoactive only under UV. However, Ag3PO4 suffers of photocorrosion and therefore composites should be prepared to limit this detrimental effect. In this work, pure Ag3PO4 and its composites with AgI, TiO2, 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 TiO2, despite their lower photoactivity compared to pure Ag3PO4, 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 Ag3PO4 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). |
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| Keywords: | Composite Photocatalysis UV-filter Antimicrobial |
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