Visible Light-Driven Photocatalysis and Antibacterial Performance of a Cu-TiO 2 Nanocomposite.

Autor: de Lima MS; Postgraduate Program in Materials Science and Engineering, University of Caxias do Sul, 95070560 Caxias do Sul, Rio Grande do Sul, Brazil., Schio AL; Postgraduate Program in Materials Science and Engineering, University of Caxias do Sul, 95070560 Caxias do Sul, Rio Grande do Sul, Brazil., Aguzzoli C; Postgraduate Program in Materials Science and Engineering, University of Caxias do Sul, 95070560 Caxias do Sul, Rio Grande do Sul, Brazil., de Souza WV; Biotechnology Institute, University of Caxias do Sul, 95070560 Caxias do Sul, Rio Grande do Sul, Brazil., Roesch-Ely M; Postgraduate Program in Materials Science and Engineering, University of Caxias do Sul, 95070560 Caxias do Sul, Rio Grande do Sul, Brazil.; Biotechnology Institute, University of Caxias do Sul, 95070560 Caxias do Sul, Rio Grande do Sul, Brazil., Leidens LM; 'Gleb Wataghin' Institute of Physics, State University of Campinas, 13083-859 São Paulo, Brazil., Boeira CD; 'Gleb Wataghin' Institute of Physics, State University of Campinas, 13083-859 São Paulo, Brazil., Alvarez F; 'Gleb Wataghin' Institute of Physics, State University of Campinas, 13083-859 São Paulo, Brazil., Elois MA; Department of Microbiology, Immunology and Parasitology, Federal University of Santa Catarina, 88040-900 Florianópolis, Santa Catarina, Brazil., Fongaro G; Department of Microbiology, Immunology and Parasitology, Federal University of Santa Catarina, 88040-900 Florianópolis, Santa Catarina, Brazil., Figueroa CA; Postgraduate Program in Materials Science and Engineering, University of Caxias do Sul, 95070560 Caxias do Sul, Rio Grande do Sul, Brazil., Michels AF; Postgraduate Program in Materials Science and Engineering, University of Caxias do Sul, 95070560 Caxias do Sul, Rio Grande do Sul, Brazil.
Jazyk: angličtina
Zdroj: ACS omega [ACS Omega] 2024 Nov 11; Vol. 9 (47), pp. 47122-47134. Date of Electronic Publication: 2024 Nov 11 (Print Publication: 2024).
DOI: 10.1021/acsomega.4c07515
Abstrakt: A Cu-TiO 2 nanomaterial with unique antibacterial and photocatalytic properties is introduced in this study. Cu-TiO 2 nanocomposites were obtained using an adapted direct current magnetron sputtering apparatus, where TiO 2 anatase nanoparticles (NPs) were used as the substrates and copper as the sputtering target. The obtained powder was characterized by physical and chemical methods. Copper was deposited on TiO 2 NPs for 30 and 60 min, resulting in two samples with different copper contents of 3 and 5 wt %, respectively. The photocatalysis test evaluated the degradation of rhodamine B (RhB) dye under a specific wavelength (405 nm LED) and a complete degeneration occurred in 120 min, ∼ 33% faster when compared to pristine TiO 2 . The antibacterial assays were performed for Escherichia coli and Staphylococcus aureus in dark and visible-light conditions, using a 405 nm LED and a wide-spectrum white LED, reaching an inactivation of 99.9999% for both bacteria. The magnetron sputtering is an ecofriendly way to form heterojunctions with photocatalytic and bactericidal properties in the absence of wet chemical methods or residues. This work may open new pathways for enhancing the fungicidal and virucidal activities of nanocomposites under the action of visible light.
Competing Interests: The authors declare no competing financial interest.
(© 2024 The Authors. Published by American Chemical Society.)
Databáze: MEDLINE
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