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- Title
Photooxidation and Virus Inactivation using TiO<sub>2</sub>(P25)-SiO<sub>2</sub> Coated PET Film.
- Authors
Chaowat Autthanit; Supachai Jadsadajerm; Oswaldo Núñez; Purim Kusonsakul; Jittima Amie Luckanagul; Visarut Buranasudja; Bunjerd Jongsomjit; Supareak Praserthdam; Piyasan Praserthdam
- Abstract
This study chemically modified PET film surface with P25 using silicate as a binder. Different P25-binder ratios were optimized for the catalyst performance. The modified samples were analyzed by scanning electron microscopy-energy-dispersive X-ray spectroscopy and Fourier transform infrared spectroscopy. Diffuse reflectance UV-vis spectra revealed significant reductions in the band gaps of the P25 solid precursor (3.20 eV) and the surface-modified PET-1.0Si-P25 (2.77 eV) with visible light. Accordingly, under visible light conditions, catalyst activity on the film will occur. Additionally, the film's performance was evaluated using methylene blue (MB) degradation. Pseudo-first-order-rate constants (min-1), conversion percentages, and rates (µg.mL-1.gcat -1.h-1) were determined. The coated films were evaluated for viral Phi-X 174 inactivation and tested with fluorescence and UV-C light illumination, then log (N/N0) versus t plots (N = [virus] in plaque-forming units [PFUs]/mL) were obtained. The presence of nanosilica in PET showed a high adsorption ability in both MB and Phi-X 174, whereas the best performances with fluorescent light were obtained from PET-1.0Si-P25 and PET-P25-1.0Si-SiO2 equally. A 0.2-log virus reduction was obtained after 3 h at a rate of 4×106 PFU.mL-1.gcat -1.min-1. Additionally, the use of this film for preventing transmission by direct contact with surfaces and via indoor air was considered. Using UV light, the PET-1.0Si-P25 and PET-1.0Si-P25-SiO2 samples produced a 2.5-log inactivation after 6.5 min at a rate of 9.6×106 and 8.9×106 PFU.mL-1.gcat -1.min-1, respectively.
- Subjects
VIRUS inactivation; BAND gaps; FOURIER transform infrared spectroscopy; PHOTOOXIDATION; VISIBLE spectra
- Publication
Bulletin of Chemical Reaction Engineering & Catalysis, 2022, Vol 17, Issue 3, p508
- ISSN
1978-2993
- Publication type
Article
- DOI
10.9767/bcrec.17.3.14180.508-519