Phytosynthesis of TiO2 Nanoparticles Using E. crassipes Leaf Extracts, Their Photocatalytic Evaluation and Microbicide Effect
Por:
Velázquez-Hernández A.M., García-Rivas J.L., Martinez-Gallegos, Sonia, González-Juárez J.C., Schabes-Retchkiman, Pablo, Albiter, Veronica
Publicada:
7 dic 2022
Resumen:
In the present research work, the photocatalytic and microbicidal
activities of titanium nanoparticles (TiO2 NPs) were evaluated. TiO2 NPs
were obtained through the phytosynthesis process, using Eichhornia
crassipes leaf extract. In order to determine whether particle size
improves photocatalytic and microbicidal activities, the pH of the
photosynthesized was modified to 12, 7, and 4. The TiO2 NPs modified
were characterized by UV-Vis spectroscopy (UV-Vis), Fourier transform
infrared spectroscopy (FT-IR), and high-resolution transmission electron
microscopy (HR-TEM) to reveal the crystalline and morphological nature
of the phytosynthesized TiO2 NPs. UV-Vis analysis revealed that the
wavelength for the TiO2 NPs was 327 nm, while FT-IR confirmed the
presence of TiO2 NPs at peaks located between 536 and 532 cm(-1).
Finally, HR-TEM analysis showed that all nanoparticles had a TiO2
composition and a particle size ranging from 25 to 35 nm. For the
photocatalytic and microbicidal tests, three concentrations of
nanoparticles were used (100, 50, and 10 mg/L), and the results showed
that TiO2 nanoparticles at a concentration of 10 mg center dot L-1
demonstrated excellent photocatalytic activity in photodegrading phenol
[10 mg center dot L-1] up to 98.7%, while their microbicidal activity
was more effective in contact with S. aureus than with E. coli, using a
TiO2 NPs concentration of 100 mg center dot L-1.
Filiaciones:
Velázquez-Hernández A.M.:
Tecnológico Nacional de México, Instituto Tecnológico de Toluca, División de Estudios de Posgrado e Investigación, Av. Tecnológico S/N Col. Agrícola Bellavista, Metepec, C.P. 52149, Mexico
Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica Ciudad UniversitariaCDMX C.P. 04510, Mexico
García-Rivas J.L.:
Tecnológico Nacional de México, Instituto Tecnológico de Toluca, División de Estudios de Posgrado e Investigación, Av. Tecnológico S/N Col. Agrícola Bellavista, Metepec, C.P. 52149, Mexico
Martinez-Gallegos, Sonia:
Tecnológico Nacional de México, Instituto Tecnológico de Toluca, División de Estudios de Posgrado e Investigación, Av. Tecnológico S/N Col. Agrícola Bellavista, Metepec, C.P. 52149, Mexico
Tecnol Nacl Mexico, Inst Tecnol Toluca, Div Estudios Posgrad & Invest, Av Tecnol S-N, Metepec 52149, Mexico
González-Juárez J.C.:
Tecnológico Nacional de México, Instituto Tecnológico de Toluca, División de Estudios de Posgrado e Investigación, Av. Tecnológico S/N Col. Agrícola Bellavista, Metepec, C.P. 52149, Mexico
Schabes-Retchkiman, Pablo:
Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica Ciudad UniversitariaCDMX C.P. 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Fis, Circuito Invest Cient Ciudad Univ, Cdmx 04510, Mexico
Albiter, Veronica:
Tecnológico Nacional de México, Instituto Tecnológico de Toluca, División de Estudios de Posgrado e Investigación, Av. Tecnológico S/N Col. Agrícola Bellavista, Metepec, C.P. 52149, Mexico
Tecnol Nacl Mexico, Inst Tecnol Toluca, Div Estudios Posgrad & Invest, Av Tecnol S-N, Metepec 52149, Mexico
gold, Gold
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