Catalytic reduction of organic pollutants, antibacterial and antifungal activities of AgNPs@CuO nanoparticles–loaded mesoporous silica

Habeche, Fatima; Boukoussa, Bouhadjar; Ismail, Issam; Mokhtar, Adel; Lu, Xinnan; Iqbal, Jibran; Hacini, Salih; Hachemaoui, Mohammed; Bengueddach, Abdelkader; Hamacha, Rachida

doi:10.1007/s11356-022-24317-6

Cited by 11 publications

(2 citation statements)

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“…Additionally, the modification of mesoporous silica through metal ion doping influences its surface chemistry, allowing the introduced metal ions to serve as active centers for binding biomolecules. This interaction is particularly significant in biomedical application including antimicrobial [27] and drug delivery systems [28]. The modification induces changes in the mesoporous silica's framework, leading to alterations in its physicochemical properties.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced optical and antimicrobial activities of mono Zn and bimetallic (Zn, Co), (Zn, Pd) ions modified MCM-41: structural and morphological investigation

Wahba,

Khaled,

Dawy

et al. 2024

J Porous Mater

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Mono and bimetallic modified MCM-41(Mobil Composition of Matter No. 41): Zn-MCM (ZM), Zn/Co-MCM41 (ZCM), and Zn/Pd-MCM-41 (ZPM) molecular sieves were produced by a surfactant-assisted technique. The structural and textural features were examined through spectroscopic and analytical techniques. The XRD analysis indicated broadening of diffraction peaks and a shift towards higher 2-theta values in the metal-incorporated (M-MCM-41) samples, confirming the successful integration of metal atoms into the MCM-41 framework; it also highlighted the preservation of a hexagonal structure with reasonable regularity, emphasizing the influence of metal incorporation on the mesoporous architecture of MCM-41. N2 adsorption–desorption isotherms revealed type IV isotherms for all samples; the BET specific surface area decreased to 672.48, 667.90, and 562.50 m2/g in ZM, ZCM, and ZPM, respectively comparing to the unincorporated MCM-41 sample (1200 m2/g), indicating partial filling of mesopores by metal centers, as confirmed by TEM images. The diffuse reflectance spectra exhibited a noteworthy optical band gap reduction of MCM-41 (5.98 eV) upon the incorporation of Zn and Co/Zn ions, resulting in values of 5.86 and 5.24 eV, respectively, with refractive index values close to 2. Additional absorption bands energies are observed at 3.14, 3.18, and 1.70 eV in ZM, ZPM, and ZCM samples, respectively suggesting the suitability of the metal incorporated samples for the photocatalytic applications. The M-incorporated samples exhibited a decline in the transmission intensity accompanied by small shifts. The enhanced antimicrobial activity of the metal-incorporated samples, surpassing that of the pure MCM-41 against a variety of tested microorganisms, is attributed to the presence of incorporated metal species, which create a more acidic environment and substantially contribute to the heightened antimicrobial effectiveness. The ZM compound demonstrated potent inhibition against Bacillus cereus and Pseudomonas aeruginosa bacteria, displaying comparable efficacy to Ampicillin, as a reference antibiotic. Additionally, ZPM exhibited considerable inhibitory activity against Escherichia coli, surpassing the reference antibiotic and showing similar effectiveness against Bacillus cereus, Pseudomonas aeruginosa, and Salmonella typhimurium.

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Section: Introductionmentioning

confidence: 99%

“…This alteration enhances catalytic activity, providing a conducive environment for various biological processes. The presence of metal-doped sites catalyzes specific reactions, making them pivotal for biological applications such as antibacterial or antifungal activities [27,31].…”

Section: Introductionmentioning

confidence: 99%