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Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology
Jun, 2023;22 (6): 1223-1231.

Photocatalytic activity of P-doped TiO photocatalyst.

Raffaella Rescigno, Olga Sacco, Vincenzo Venditto, Alessandra Fusco, Giovanna Donnarumma, Mariateresa Lettieri, Rosalba Fittipaldi, Vincenzo Vaiano
Author Information
  1. Raffaella Rescigno: Department of Chemistry and Biology, INSTM Unit, University of Salerno, Via Giovanni Paolo II, 84084, Fisciano, Salerno, Italy.
  2. Olga Sacco: Department of Chemistry and Biology, INSTM Unit, University of Salerno, Via Giovanni Paolo II, 84084, Fisciano, Salerno, Italy.
  3. Vincenzo Venditto: Department of Chemistry and Biology, INSTM Unit, University of Salerno, Via Giovanni Paolo II, 84084, Fisciano, Salerno, Italy. vvenditto@unisa.it. ORCID
  4. Alessandra Fusco: Department of Experimental Medicine, Section of Microbiology and Clinical Microbiology, Sant'Andrea delle Dame Complex, University of Campania "Luigi Vanvitelli", Via De Crecchio 7, 80138, Naples, Italy.
  5. Giovanna Donnarumma: Department of Experimental Medicine, Section of Microbiology and Clinical Microbiology, Sant'Andrea delle Dame Complex, University of Campania "Luigi Vanvitelli", Via De Crecchio 7, 80138, Naples, Italy. giovanna.donnarumma@unicampania.it.
  6. Mariateresa Lettieri: CNR-SPIN, c/o University of Salerno, Via Giovanni Paolo II 132, 84084, Fisciano, Salerno, Italy.
  7. Rosalba Fittipaldi: CNR-SPIN, c/o University of Salerno, Via Giovanni Paolo II 132, 84084, Fisciano, Salerno, Italy.
  8. Vincenzo Vaiano: Department of Industrial Engineering, University of Salerno, via Giovanni Paolo II, 132, 84084, Fisciano, Salerno, Italy.
PMID: 36656508 DOI: 10.1007/s43630-023-00363-y

Abstract

In this study, P-doped TiO photocatalysts with different molar percentages (in the range 0.071-1.25 mol %) of the non-metallic element were prepared and their photocatalytic activity under visible light irradiation was tested. All achieved samples were characterized by XRD, Raman, UV-Vis DRS and SEM-EDX techniques. XRD and Raman analysis showed that all doped photocatalysts were in anatase phase and evidenced that P ions were successfully incorporated into the TiO crystal lattice, affecting also the crystallinity degree of the P-doped TiO photocatalysts. Noticeably, the UV-Vis DRS spectra evidenced that the highest redshift in absorption edge was observed for the photocatalyst with the lowest P content (0.071PT), which showed also the lowest bandgap (2.9 eV). The photocatalytic performances of all P-doped TiO samples were compared with that of commercial TiO by evaluating the decolorization of methylene blue (MB) dye under visible light irradiation. Results showed that phosphorus doping strongly promoted photocatalytic activity in the presence of visible light. Furthermore, the most active photocatalyst in visible light tests (0.071PT) also showed better photocatalytic activity than commercial TiO in the decolorization of MB under simulated sunlight irradiation. Finally, 0.071PT photocatalyst was preliminarily tested against Escherichia coli (E. coli) under simulated solar light, showing an inactivation efficiency of 90% after 2 h of treatment time.

Keywords

Antibacterial activity Escherichia coli Phosphorus-doped-TiO2 Photocatalysis Solar light methylene blue Visible light

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MeSH Term

Escherichia coli
Catalysis
Light
Titanium
Methylene Blue

Chemicals

titanium dioxide
Titanium
Methylene Blue
Journal Article

Word Cloud

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