Sol-Gel-Derived TiO 2 and TiO 2 /Cu Nanoparticles: Synthesis, Characterization, and Antibacterial Efficacy.

Autor: Sondezi N; Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein, Johannesburg 2028, South Africa.; DSI/Mintek Nanotechnology Innovation Centre, Water Research Node, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein, Johannesburg 2028, South Africa., Njengele-Tetyana Z; Advanced Materials Division, DSI/Mintek Nanotechnology Innovation Centre, Private Bag X3015, Randburg 2125, South Africa., Matabola KP; Advanced Materials Division, DSI/Mintek Nanotechnology Innovation Centre, Private Bag X3015, Randburg 2125, South Africa.; Department of Water and Sanitation, University of Limpopo, Private Bag X1106, Sovenga 0727, South Africa., Makhetha TA; Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein, Johannesburg 2028, South Africa.; DSI/Mintek Nanotechnology Innovation Centre, Water Research Node, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein, Johannesburg 2028, South Africa.
Jazyk: angličtina
Zdroj: ACS omega [ACS Omega] 2024 Mar 29; Vol. 9 (14), pp. 15959-15970. Date of Electronic Publication: 2024 Mar 29 (Print Publication: 2024).
DOI: 10.1021/acsomega.3c09308
Abstrakt: This study reports on the antibacterial efficacy of both the TiO 2 and TiO 2 /Cu nanoparticles prepared through the sol-gel method. The materials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and Brunauer-Emmett-Teller (BET) analysis. The SEM and TEM showed the spherical morphology of the nanoparticles, while EDX and XPS confirmed the incorporation of Cu into the TiO 2 nanoparticles. The XRD confirmed the formation of the tetragonal anatase phase of TiO 2 /Cu while the FTIR revealed the functional groups linked to the doped TiO 2 nanoparticles. The thermal stability of TiO 2 /Cu was found to be lower than pure TiO 2 . Moreover, TiO 2 and the doped TiO 2 nanoparticles were notably effective against Bacillus subtilis ( B. subtilis ) and Escherichia coli ( E. coli ); however, the addition of Cu to TiO 2 did not have any effect on the antibacterial activity probably due to the lower weight content in the composites. Interestingly, the antibacterial efficiency was determined to be 90 and 80% against B. subtilis and E. coli , respectively.
Competing Interests: The authors declare no competing financial interest.
(© 2024 The Authors. Published by American Chemical Society.)
Databáze: MEDLINE
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