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3. WiWell® TiO2-photocatalytic adhesive films to reduce microbial charge in indoor microenvironments of public transportation and ensure biosafety in the COVID-19 time

Author

Tirelli Umberto, Luca Berto, and Salvatore Chirumbolo

Subjects
Chemistry, QD1-999
Abstract

A nanosized TiO2-Ag nanoparticulate doped photocatalytic adhesive membrane, recently patented as WiWell™ (WippyIdea®), has been used in the indoor environment of public transportation to decrease the airborne microbiome and the microbial charge on handy surfaces, to ensure a safe context to people using and or crowding the place. While the simple cleaning process with chemical sanitizers reached a reduction of indoor microbial contamination as high as 40%, the use of the photocatalytic films lowered the microbial pollution, measured via ATP-bio-luminescence, to values ≥ 94%, ensuring much safer indoor conditions for people travelling. This pilot study, performed on the field, encourages further research to support this patented technology and apply it everywhere.

Published
2022
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8. The Oxygen–Ozone Adjunct Medical Treatment According to the Protocols from the Italian Scientific Society of Oxygen–Ozone Therapy: How Ozone Applications in the Blood Can Influence Clinical Therapy Success via the Modulation of Cell Biology and Immunity

Author

Chirumbolo, Salvatore, primary, Valdenassi, Luigi, additional, Tirelli, Umberto, additional, Ricevuti, Giovanni, additional, Pandolfi, Sergio, additional, Vaiano, Francesco, additional, Galoforo, Antonio, additional, Loprete, Fortunato, additional, Simonetti, Vincenzo, additional, Chierchia, Marianna, additional, Bellardi, Debora, additional, Richelmi, Tommaso, additional, and Franzini, Marianno, additional

Published
2023
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18. Comparison of 36 Gy, 20 Gy, or No Radiation Therapy After 6 Cycles of EBVP Chemotherapy and Complete Remission in Early-Stage Hodgkin Lymphoma Without Risk Factors: Results of the EORT-GELA H9-F Intergroup Randomized Trial

Author

Thomas, José, Fermé, Christophe, Noordijk, Evert M., Morschhauser, Franck, Girinsky, Théodore, Gaillard, Isabelle, Lugtenburg, Pieternella J., André, Marc, Lybeert, Marnix L.M., Stamatoullas, Aspasia, Beijert, Max, Hélias, Philippe, Eghbali, Houchingue, Gabarre, Jean, van der Maazen, Richard W.M., Jaubert, Jérôme, Bouabdallah, Krimo, Boulat, Olivier, Roesink, Judith M., Christian, Bernard, Ong, Francisca, Bordessoule, Dominique, Tertian, Gérard, Gonzalez, Hugo, Vranovsky, Andrej, Quittet, Philippe, Tirelli, Umberto, de Jong, Daphne, Audouin, Josée, Aleman, Berthe M.P., and Henry-Amar, Michel

Published
2018
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35. Treatment factors affecting outcomes in HIV-associated non-Hodgkin lymphomas: a pooled analysis of 1546 patients

Author

Barta, Stefan K., Xue, Xiaonan, Wang, Dan, Tamari, Roni, Lee, Jeannette Y., Mounier, Nicolas, Kaplan, Lawrence D., Ribera, Josep-Maria, Spina, Michele, Tirelli, Umberto, Weiss, Rudolf, Galicier, Lionel, Boue, Francois, Wilson, Wyndham H., Wyen, Christoph, Oriol, Albert, Navarro, José-Tomás, Dunleavy, Kieron, Little, Richard F., Ratner, Lee, Garcia, Olga, Morgades, Mireia, Remick, Scot C., Noy, Ariela, and Sparano, Joseph A.

Published
2013
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41. TiO2–Ag–NP adhesive photocatalytic films able to disinfect living indoor spaces with a straightforward approach.

Author

Chirumbolo, Salvatore, Gibellini, Davide, Berto, Luca, Cirrito, Cinzia, Vella, Antonio, Bjørklund, Geir, Sbarbati, Andrea, Bernardi, Paolo, and Tirelli, Umberto

Subjects
ADHESIVES, INDOOR air pollution, MICROBIOLOGICAL aerosols, WORKING hours, STANDARDIZED tests, PHOTOCATALYSTS
Abstract

TiO2–Ag doped nanoparticulate (TiO2–Ag–NP) adhesive photocatalytic films were used to assess the ability in dropping down the burden of indoor microbial particles. The application of an easy-to use photocatalytic adhesive film to cleanse indoor living spaces from microbial pollution, represents a novelty in the field of photocatalytic devices. Reduction was attained by photocatalysis in selected spaces, usually with overcrowding (≥ 3 individuals) in the common working daily hours, and upon indoor microclimate monitoring. TiO2–Ag doped nanoparticulate (TiO2–Ag–NP) adhesive photocatalytic films were applied within five types of living spaces, including schools and job places. The microbial pollution was assessed at time 0 (far from routine clean, ≥ 9 h) and throughout 2–4 weeks following the photocatalyst application by relative light unit (RLU) luminometry and microbial indirect assessment (colony forming units per cubic meter, CFU/m3). TiO2–Ag–NP photocatalyst reduced RLU and CFU/m3 by rates higher than 70% leading to RLU ≤ 20 and microbial presence ≤ 35 CFU/m3. The described TiO2–Ag–NP is able to reduce microbial pollution to the lowest RLU threshold (≤ 20) within 60 min in open daylight in a standardized test room of 100 m2. The correlation between RLU and CFU/m3 was positive (r = 0.5545, p < 0.05), assessing that the microbial reduction of indoor areas by the TiO2–Ag–NP adhesive film was real. Titania photocatalysts represent promising tools to ensure air cleaning and sanitization in living indoor microclimates with a low cost, feasible and straightforward approach. This approach represents an easy to handle, cost effective, feasible and efficacious approach to reduce microbial pollution in indoor spaces, by simply attaching a TiO2–Ag–NP adhesive film on the wall. [ABSTRACT FROM AUTHOR]

Published
2023
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