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. 2022 Dec 15:10:1083596.
doi: 10.3389/fchem.2022.1083596. eCollection 2022.

Green synthesis of multifunctional MgO@AgO/Ag2O nanocomposite for photocatalytic degradation of methylene blue and toluidine blue

Younes Zidane  1   2 , Salah E Laouini  1   2 , Abderrhmane Bouafia  1   2 , Souhaila Meneceur  1   2 , Mohammed L Tedjani  1   2 , Sohad A Alshareef  3 , Hanadi A Almukhlifi  3 , Khansaa Al-Essa  4 , Ethar M Al-Essa  5 , Mohammed M Rahman  6 , Osama Madkhali  7 , Farid Menaa  8
Affiliations

Green synthesis of multifunctional MgO@AgO/Ag2O nanocomposite for photocatalytic degradation of methylene blue and toluidine blue

Younes Zidane et al. Front Chem. .

Abstract

Introduction: In this paper, MgO@AgO/Ag2O nanoparticles were greenly synthesized, the current idea is to replace the harmful chemical technique with an ecofriendly synthesis of metal oxide nanoparticles (NPs) utilizing biogenic sources. Methods: The current investigation was conducted to create silver oxide NPs decorated by MgO NPs (namely, MgO@AgO/Ag2O nanocom-posite) using the leaves extract of Purslane (Portulaca Oleracea) as the reducing and capping agent. The nanopowder was investigated by means of X-ray diffraction, scanning electron mi-croscope, BET surface area, Fourier transform infrared, and UV-vis spectrophotom-eter studies. XRD studies reveal the monophasic nature of these highly crystalline silver nano-particles. SEM studies the shape and morphology of the synthesis AgO/Ag2O and MgO@AgO/Ag2O NPs. The presence of magnesium and oxygen was further confirmed by EDS profile. Results and discussion: The surface area was found to be 9.1787 m2/g and 7.7166 m2/g, respectively. FTIR analysis showed the presence of specific functional groups. UV-vis spectrophotometer studies show the absorption band at 450 nm due to surface plasmon resonance. The results have also indicated the high performance of the greenly synthesized AgO/Ag2O NPs and MgO@AgO/Ag2O NPs for photocatalytic activity dye degradation (methylene blue and toluidine blue).

Keywords: MgO@AgO/Ag2O NPs; Portulaca oleracea; green synthesis; methylene blue; photocatalysis; toluidine blue.

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Conflict of interest statement

Author FM was employed by the company Fluorotronics, Inc.-California Innovations Corporation. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

FIGURE 1
FIGURE 1
XRD patterns of AgO/Ag2O and MgO@AgO/Ag2O NPs.
FIGURE 2
FIGURE 2
SEM images and particle size distributions: (A,B) AgO/Ag2O NPs, (C,D) MgO@AgO/Ag2O NPs.
FIGURE 3
FIGURE 3
EDS of: (A) AgO/Ag2O and (B) MgO@AgO/Ag2O NPs.
FIGURE 4
FIGURE 4
Nitrogen adsorption-desorption isotherms: (A) AgO/Ag2O, (B) MgO@AgO/Ag2O NPs.
FIGURE 5
FIGURE 5
(A) FTIR spectra of Purslane (Portulaca Oleracea) leaf extract, AgO/Ag2O, and MgO@AgO/Ag2O; (B) zoomed view range (400 to 1,100 cm−1).
FIGURE 6
FIGURE 6
UV-vis spectra of (A) Extract, AgO/Ag2O, and MgO@AgO/Ag2O (B) Optical energy gap for direct, (C) Indirect transitions, and (D) Urbach energy.
FIGURE 7
FIGURE 7
The effect reaction time on the degradation of MB, obtained by (A) AgO/Ag2O, Absorbance and degradation versus time: (B) AgO/Ag2O, (C) MgO@AgO/Ag2O; (D) MgO@AgO/Ag2O NPs catalyzed degradation of MB dye.
FIGURE 8
FIGURE 8
The effect of reaction time on degradation of TB, obtained by (A) AgO/Ag2O, Absorbance and degradation versus time: (B) AgO/Ag2O, (C) MgO@AgO/Ag2O; (D) MgO@AgO/Ag2O NPs catalyzed degradation of TB dye.
FIGURE 9
FIGURE 9
MB and TB photocatalytic mineralization mechanism on the surface of AgO/Ag2O and MgO@AgO/Ag2O.
See this image and copyright information in PMC

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