Matrix effect of montmorillonite and MCM-41 matrices on the antibacterial activity of Ag2CO3 nanoparticles

Sohrabnezhad, Sh.; Sadeghi, A.

doi:10.1016/j.clay.2014.12.034

Cited by 16 publications

(10 citation statements)

References 55 publications

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“…The UV–vis DRS of the different samples are shown in Figure 4. MCM‐41 and Fe 3 O 4 supports show no peaks at 300–800 nm, which is similar to earlier reports [34,35] . The UV–vis spectra of MIL‐101 (Cr) exhibit three strong absorption bands at ~300, 410, and 560 nm, assignable to the d→d electronic transitions (inset Figure 4).…”

Section: Resultssupporting

confidence: 87%

Matrices based on meso antibacterial framework

Sohrabnezhad

Pourahmad

Salahshoor

2020

J Chinese Chemical Soc

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In this paper, the synthesis of three types of porous materials (PMs) (porous Fe 3 O 4 , MIL-101 metal-organic framework (MOF), and MCM-41 mesoporous silica) by hydrothermal method was performed. The incorporation of Ag nanoparticles (Ag NPs) was carried out after the synthesis reaction of supports in MCM-41 and MIL-101 MOF. Ag core@ porous Fe 3 O 4 core-shell system was prepared via a one-pot hydrothermal method. Ag-MIL-101 was obtained using Urtica dioica leaf extract as the green solvent and reducing agent. The antibacterial activity of Ag-PM nanocomposites (NCs) was investigated on both Gram-negative and Gram-positive bacteria. The size of the silver NPs was determined to be 12 and 30 nm in MCM-41 and MIL-101 MOF, respectively. The diameter of Ag core in Ag@Fe 3 O 4 shell was~135 nm. The antibacterial activity of Ag-PMs was in the order Ag-MCM-41 > Ag-MIL-101 > Ag core@Fe 3 O 4 shell. The loading percent of Ag NPs in MCM-41 (84%) was more than that in MIL-101 (53%) and Fe 3 O 4 (31%). The release of Ag + ions from Ag-MCM-41, Ag-MIL-101, and Ag@Fe 3 O 4 NCs was 46, 2, and 1 ppm, respectively. The release of the Ag + ions and, consequently, the antibacterial activity of NCs depend on the uniform distribution, particles size, and the absence of aggregation of Ag NPs in PMs.

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Section: Resultssupporting

confidence: 87%

Matrices based on meso antibacterial framework

Sohrabnezhad

Pourahmad

Salahshoor

2020

J Chinese Chemical Soc

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“…For pure Ag 2 CO 3 , the diffractograms were recorded every 25°C from 50 to 235°C. An isotherm was maintained at each level for 10 min to record the XRD pattern and then the temperature was increased to the next step using a ramp of 1 deg·s −1 as explained in details context, in the ancient Greece, it was customary to place silver coins in water to inhibit bacterial growth [36]. Therefore it is a good candidate as multi-functional material, i.e.…”

Section: Characterization Methods and Techniquesmentioning

confidence: 99%

“…In this respect, despite the issue of its sensitivity to photo-corrosion [29][30][31][32], silver carbonate (Ag 2 CO 3 ) was reported to exhibit highly efficient photoactivity under visible light [30,[32][33][34][35]. Also, Ag-based compounds are well known for antibacterial activity [36][37][38]. In this dispersion for 15 min.…”

Section: Introductionmentioning

confidence: 95%

Influence of the crystal structure of Ag2CO3 on the photocatalytic activity under visible light of Ag2CO3-Palygorskite nanocomposite material

Lakbita

Rhouta

Maury

et al. 2019

Applied Surface Science

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A B S T R A C TIn a companion paper, it has been demonstrated the remarkably beneficial effect of palygorskite clay (Pal) fibers as support material coupled to appropriate thermal treatments and aging under CO 2 atmosphere in monitoring the phase composition of Ag 2 CO 3 -Pal composite. In this new nanocomposite material, the structure of the functional component Ag 2 CO 3 can be controlled from 100% stable monoclinic (m) to 100% metastable hexagonal β through an adjusted mixture of m-and β-Ag 2 CO 3 . The present study deals with the assessment of the visible photocatalytic properties of these various nanocomposite materials towards the removal of Orange G dye from aqueous solutions. It was found that the Ag 2 CO 3 -Pal nanocomposite in which Ag 2 CO 3 was single-phased and crystallized with the stable monoclinic structure was more active than the one crystallizing entirely with the metastable β-Ag 2 CO 3 structure. Nevertheless, the composite material containing a mixture of both Ag 2 CO 3 phases with a relative content of 32% of β-and 68% of m-phase was found to be the most photoactive compound of the series. This behavior reveals likely a synergetic effect between both phases in the photocatalytic degradation of the dye under visible light.

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“…The disruption of these vital cellular processes ultimately leads to bacterial destruction and inhibits its survival. 56,57 To better assess the antibacterial activity of the materials used, Table 3 groups together the antibacterial activity against S.aureus and E. Coli of a number of materials, as shown in the table below. The Ag@MCM-41 shows good antibacterial performance in comparison with the reported materials, this can be attributed to the porous structure of Ag@MCM-41 that can promote better contact with bacterial cells, increasing the chances of silver nanoparticles interacting with bacteria, thus improving antibacterial performance.…”

Section: Antibacterial Studymentioning

confidence: 99%