Novel Fe2O3-CuO-MoO3 Magnetic Nanocomposite for Photocatalysis of Methylene Blue

Mahmood, Abid; Zulfiqar, Salaha; Ali, Shaista; Ammara, Umme; Mahmood, K.; Farrukh, Muhammad Akhyar; Saeed, Zohaib; Ibrahim, Muhammad

doi:10.1007/s10948-020-05725-6

Cited by 5 publications

(2 citation statements)

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“…The hole generated in valence band captures the OH − or H 2 O species resulting in formation of OH˙. Both OH˙ and ˙O 2 − are strong oxidizing agents which attack the dye and decomposition process begin resulting in complete degradation of dye along with formation of byproducts (Equation 17–21) (Mahmood et al, 2021).

Ag  CuO goodbreak+ italichv \to Ag  CuO ((), {normalh}^{+}_{(VB)} goodbreak+ {normale}^{-}_{(CB)}),

Ag  CuO ((), {e^{-}}_{((), CB)}) goodbreak+ rGO \to Ag  CuO goodbreak+ rGO ((), {normale}^{-}),

Ag  CuO  rGO ((), {normale}^{-}) goodbreak+ O_{2} \to Ag  CuO goodbreak+ rGO goodbreak+ ˙ {normalO}_{2}^{-},

Ag  CuO ((), {h^{+}}_{((), VB)}) goodbreak+ H_{2} normalO \to Ag goodbreak- CuO goodbreak+ OH ˙,

OH ˙ + ˙ {O_{2}}^{-} + MB \to degradation (products {CO}_{2} and {normalH}_{2} O) .

…”

Section: Resultsmentioning

confidence: 99%

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Elucidating the structural, catalytic, and antibacterial traits ofFicus caricaandAzadirachta indicaleaf extract‐mediated synthesis of theAg/CuO/rGOnanocomposite

Fayyaz,

Farrukh,

Ul‐Hamid

et al. 2024

Microscopy Res & Technique

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The present exploration demonstrates the efficient, sustainable, cost‐effective, and environment‐friendly green approach for the synthesis of silver (Ag)‐doped copper oxide (CuO) embedded with reduced graphene oxide (rGO) nanocomposite using the green one‐pot method and the green deposition method. Leaf extracts of Ficus carica and Azadirachta indica were used for both methods as reducing and capping agents. The effect of methodology and plant extract was analyzed through different characterization techniques such as UV‐visible spectroscopy, Fourier transform infrared (FT‐IR) spectroscopy, thermogravimetric analysis (TGA), x‐ray diffraction (XRD) analysis, scanning electron microscopy (SEM), high‐resolution transmission electron microscopy (HRTEM). The lowest band gap of 3.0 eV was observed for the Ag/CuO/rGO prepared by the green one‐pot method using F. carica. The reduction of graphene oxide (GO) and the formation of metal oxide was confirmed through functional group detection using FT‐IR. Calculation of thermodynamic parameters showed that all reactions involved were nonspontaneous and endothermic which shows the stability of nanocomposites. XRD studies revealed the crystallinity, phase purity and small average crystallite size of 32.67 nm. SEM images disclosed that the morphology of the nanocomposites was spherical with agglomeration and rough texture. The particle size of the nanocomposites calculated through HRTEM was found in agreement with the XRD results. The numerous properties of the synthesized nanocomposites enhanced their potential against the degradation of methylene blue, rhodamine B, and ciprofloxacin. The highest percentage degradation of Ag/CuO/rGO was found to be 97%, synthesized using the green one‐pot method with F. carica against ciprofloxacin, which might be due to the lowest band gap, delayed electron–hole pair recombination, and large surface area available. The nanocomposites were also tested against the Gram‐positive and Gram‐negative bacteria.Research Highlights Facile synthesis of Ag/CuO/rGO nanocomposite using a green one‐pot method and the green deposition method. The lowest band gap of 3.0 eV was observed for nanocomposite prepared by a green one‐pot method using Ficus carica. Least average crystallite size of 32.67 nm was found for nanocomposite prepared by a green one‐pot method using F. carica. Highest antibacterial and catalytic activity (97%) was obtained against ciprofloxacin with nanocomposite prepared through green one‐pot method using F. carica. A mechanism of green synthesis is proposed.

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Ag  CuO goodbreak+ italichv \to Ag  CuO ((), {normalh}^{+}_{(VB)} goodbreak+ {normale}^{-}_{(CB)}),

Ag  CuO ((), {e^{-}}_{((), CB)}) goodbreak+ rGO \to Ag  CuO goodbreak+ rGO ((), {normale}^{-}),

Ag  CuO  rGO ((), {normale}^{-}) goodbreak+ O_{2} \to Ag  CuO goodbreak+ rGO goodbreak+ ˙ {normalO}_{2}^{-},

Ag  CuO ((), {h^{+}}_{((), VB)}) goodbreak+ H_{2} normalO \to Ag goodbreak- CuO goodbreak+ OH ˙,

OH ˙ + ˙ {O_{2}}^{-} + MB \to degradation (products {CO}_{2} and {normalH}_{2} O) .

…”

Section: Resultsmentioning

confidence: 99%

“…The hole generated in valence band captures the OH À or H 2 O species resulting in formation of OH˙. Both OH˙and ˙O2 À are strong oxidizing agents which attack the dye and decomposition process begin resulting in complete degradation of dye along with formation of byproducts (Equation 17-21) (Mahmood et al, 2021).…”

Section: Mechanism Of Photodegradationmentioning

confidence: 99%