In situ green synthesis of Ag nanoparticles on herbal tea extract (Stachys lavandulifolia)-modified magnetic iron oxide nanoparticles as antibacterial agent and their 4-nitrophenol catalytic reduction activity

Shahriary, Marjan; Veisi, Hojat; Hekmati, Malak; Hemmati, Saba

doi:10.1016/j.msec.2018.04.044

Cited by 138 publications

(53 citation statements)

References 83 publications

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“…Striking antibacterial and antioxidant properties of silver nanoparticles have made it one of most attractive metal . Recently biosynthesis of Silver nanoparticles has been studied with various plants part as olive leaf, mulberry leaves, leaf extract of Indian plants, Thymbra spicata s , Stachys lavandulifolia , green tea , Sesamum indicum seed, banana peel, oak fruit bark and Eucalyptus chapmaniana . Thymus Kotschyanus species belongs to the Lamiaceae family and widely used in modern and traditional medicine .…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of silver nanoparticles using Thymus kotschyanus extract and evaluation of their antioxidant, antibacterial and cytotoxic effects

Hamelian

Zangeneh

Amisama

et al. 2018

Applied Organom Chemis

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202

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Present study used ecofriendly, cost efficient and easy method for synthesis of silver nanoparticles (Ag NPs) at the room temperature by Thymus Kotschyanus extract as reducing and capping agent. Various analytical technique including UV–Vis absorption spectroscopy determined presence of Ag NPs in the solution, the functional groups of Thymus Kotschyanus extract in the reduction and capping process of Ag NPs are approved by FT‐IR, crystallinity with the fcc plane approved from the X‐ray diffraction (XRD) pattern, energy dispersive spectroscopy (EDS) determined existence of elements in the sample, surface morphology, diverse shapes and size of present Ag NPs were showed by using scanning electron microscopy (SEM), atomic force microscopy (AFM) and high resolution transmission electron microscopy (HRTEM). Beginning and end destroy temperature of present silver nanoparticles were determined by thermal gravimetric spectroscopy (TGA). In addition, antibacterial, antioxidant and cytotoxicity properties of Ag NPs were studied. Agar disk and agar well diffusion are the methods to determined antibacterial properties of synthesized Ag NPs. Also MIC (Minimum Inhibitory Concentration) and MBC (Minimum Bactericidal Concentration) were recognized by macro broth dilution assay. DPPH free radical scavenging assay was used for antioxidant property and compare to butylated hydroxytoluene (BHT) as standard antioxidant that showed high antioxidant activity more than BHT. Synthesized Ag NPs have great cell viability in a dose depended manner and demonstrate that this method for synthesis silver nanoparticles provided nontoxic. The average diameter of synthesized Ag NPs was about 50–60 nm.

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Section: Introductionmentioning

confidence: 99%

Green synthesis of silver nanoparticles using Thymus kotschyanus extract and evaluation of their antioxidant, antibacterial and cytotoxic effects

Hamelian

Zangeneh

Amisama

et al. 2018

Applied Organom Chemis

Self Cite

202

View full text Add to dashboard Cite

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“…The Ag 3d characteristic peak consisted of a bimodal of Ag 3d 5/2 at 365 eV and Ag 3d 3/2 at 371 eV. The binding energy difference between the two characteristic peaks was 6 eV, which confirmed that the Ag element in as‐prepared ACS films existed in the form of elemental silver . The characteristic peaks of Ag 3d 5/2 and Ag 3d 3/2 of elemental silver were distributed at 368.3 and 374.3 eV, respectively .…”

Section: Resultsmentioning

confidence: 72%

In situ synthesis and properties of Ag NPs/carboxymethyl cellulose/starch composite films for antibacterial application

Chen

Fang

et al. 2019

Polymer Composites

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Carboxymethyl cellulose (CMC) film, one of the biobased materials, exhibited poor mechanical properties. To use CMC film in antibacterial packaging, it was necessary to overcome this drawback and introduce antibacterial nanoparticles. In this article, using CMC and starch (SR) as the reductant and stabilizer, Ag nanoparticles (Ag NPs)/CMC/SR composite (ACS) films were prepared by in situ reduction method. The obtained Ag NPs were uniformly distributed in the ACS films and its diameter was in the range of 8 to 16 nm. The mechanical properties of ACS films were improved by adding SR into CMC. The ACS films exhibited higher tensile strength and lower elongation at break than that of CMC film. When the amount of SR was 4 g, the tensile strength of the ACS film reached the maximum of 9.8 MPa and its elongation at break was 63%. In addition, the ACS films showed an obvious antibacterial activity against gram‐positive bacteria Staphylococcus aureus and gram‐negative bacteria Escherichia coli via disc diffusion method. The inhibitory effect of the ACS film increased significantly as the increasing of the concentration of AgNO3 solution. Therefore, as‐prepared ACS films had potential applications in antimicrobial packaging.

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“…It was observed that the Ag‐nanomaterial presented a more defined and sharper reduction signal for 4‐NP when compared to the GCE and GCE/Si4Pic + NO 3 − electrodes. According to previous publications, silver nanoparticles are widely applied in catalysis for 4‐NP reduction .…”

Section: Resultsmentioning

confidence: 99%

Silver Nanoparticles‐Silsesquioxane Nanomaterial Applied to the Determination of 4‐Nitrophenol as a Biomarker

et al. 2019

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A novel silsesquioxane material was synthetized and used as a stabilizing agent for silver nanoparticles. This hybrid material was characterized by FTIR, 29Si CP‐MAS NMR, 13C DEPT 135° NMR and TGA techniques and the silver nanoparticles were characterized from DLS, UV‐Vis spectroscopy, zeta‐potential, TEM and SAXS results. The silver nanoparticles obtained were spherical in shape with a diameter of 3.74 nm. The nanomaterial was successfully applied in the modification of a glassy carbon electrode and a pronounced current response was obtained in the determination of the biomarker 4‐nitrophenol. Quantum chemical calculations, using density functional theory, were also performed in order to evaluate the redox properties of the analyte. Two different linear ranges were obtained applying optimal square wave voltammetry conditions. The reduction peak currents obtained were linear for 4‐NP concentrations in the ranges of 0.29 to 1.50 μmol L−1 (Ed=−0.6 V and td=20 s) and 2.75 to 31.5 μmol L−1, with a theoretical (signal to noise=3) limit of detection of 0.05 μmol L−1 (td=20 s). The proposed method was successfully applied to the determination of 4‐NP in synthetic serum samples at different levels of 4‐NP with a recovery range of 94–101 %. Validation was performed using a comparative method through the capillary electrophoresis (CE) technique.

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In situ green synthesis of Ag nanoparticles on herbal tea extract (Stachys lavandulifolia)-modified magnetic iron oxide nanoparticles as antibacterial agent and their 4-nitrophenol catalytic reduction activity

Cited by 138 publications

References 83 publications

Green synthesis of silver nanoparticles using Thymus kotschyanus extract and evaluation of their antioxidant, antibacterial and cytotoxic effects

Green synthesis of silver nanoparticles using Thymus kotschyanus extract and evaluation of their antioxidant, antibacterial and cytotoxic effects

In situ synthesis and properties of Ag NPs/carboxymethyl cellulose/starch composite films for antibacterial application

Silver Nanoparticles‐Silsesquioxane Nanomaterial Applied to the Determination of 4‐Nitrophenol as a Biomarker

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