Preparation of Stable Silver Nanoparticles Having Wide Red‐To‐Near‐Infrared Extinction

Kawamura, Shiori; Matsubara, Kazuki; Sakai, Sotaro; Sasaki, Kazuhisa; Saito, Masataro; Saito, Kenji; Yagi, Masayuki; Norimatsu, Wataru; Sasai, Ryo; Kusunoki, Michiko; Eguchi, Miharu; Yin, Shu; Yui, Tatsuto

doi:10.1002/gch2.201700105

Cited by 5 publications

(1 citation statement)

References 61 publications

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“…Silver nanoparticles (AgNPs) have received the greatest attention among the noble metallic NPs because of their distinctive physicochemical and biological properties. They have been utilized in several fields, including water purification, H 2 production from amminetrihydridoboron, biomedicine, cosmetics, membrane filtration (fouling control), and food preservation . Considering the antimicrobial activity of Ag, AgNPs are better than other Ag forms even when applied at lower concentrations .…”

Section: Introductionmentioning

confidence: 99%

Encapsulation of Biosynthesized Nanosilver in Silica Composites for Sustainable Antimicrobial Functionality

et al. 2018

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Silver nanoparticles (AgNPs) have become known as a broad‐spectrum antimicrobial agent. The antimicrobial activity of AgNPs is dependent on the particle size and the dispersion status. In this study, a simple and effective approach is developed for sequestering the biosynthesized AgNPs in silica composites during the gel formation of MCM‐41. Composites with different Ag concentrations of 0.034% (Ag1@MCM‐41), 0.151% (Ag2@MCM‐41), and 0.369% (Ag3@MCM‐41) are synthesized and then heated at 400 °C to produce Ag1@MCM‐41H, Ag2@MCM‐41H, and Ag3@MCM‐41H, respectively. The samples are characterized by flame atomic absorption spectrometry, Fourier‐transform infrared spectroscopy, X‐ray diffraction, N2 physisorption, scanning electron microscopy, transmission electron microscopy, and thermogravimetric analysis. The AgNPs are confirmed to be highly dispersed in the amorphous silica framework. The antimicrobial activity of the AgNP–silica samples is investigated against Staphylococcus aureus, Escherichia coli, and Candida albicans using the cup–plate and the plate‐count techniques. The results show an excellent antimicrobial effect of these samples against the studied microorganisms. Importantly, the AgNP–silica samples are found to be stable up to 58 months under ambient conditions. These stable and powerful antimicrobial composites provide a more practical and effective strategy for combating biomedical pathogens and public health threats.

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Section: Introductionmentioning

confidence: 99%

Encapsulation of Biosynthesized Nanosilver in Silica Composites for Sustainable Antimicrobial Functionality

et al. 2018

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Plasmonic resonance and type-I heterojunction interface in SrTiO3/CZTS/Ag nanocomposite for enhanced photocatalytic degradation of organic pollutants

Alimohammadi

Mahdikhah

Alirezazadeh

et al. 2023

Materials Today Chemistry

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Templated synthesis of atomically-thin Ag nanocrystal catalysts in the interstitial space of a layered silicate

et al. 2018

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Enclosing functional nanoparticles in stable inorganic supports is important for generating ultra-stable catalytic active sites with good performance and material utilization efficiency. Here we describe a simple method to synthesize ultra-thin Ag nanocrystals with dimensions that are defined by the ∼1.4 nm 2D interlayer separating a layered silicate nanostructure. We call the particles "nanoplates" because they are <1.4 nm thick in one direction and their in-plane dimensions are defined by reaction time. The layered silicate is pillared with dialkylurea, which serves both as a reducing agent for the Ag precursor and immobilizes the Ag nanoplates in the interstitial nanospace. The supported Ag nanoplates showed catalytic activity for hydrolysis of NH3BH3 and generation of H2 at room temperature. These supported Ag nanocatalysts had performance much higher than spherical Ag nanoparticles. They, moreover, had performance and stability comparable to costly supported Pt nanoparticles.

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Preparation of Stable Silver Nanoparticles Having Wide Red‐To‐Near‐Infrared Extinction

Cited by 5 publications

References 61 publications

Encapsulation of Biosynthesized Nanosilver in Silica Composites for Sustainable Antimicrobial Functionality

Encapsulation of Biosynthesized Nanosilver in Silica Composites for Sustainable Antimicrobial Functionality

Plasmonic resonance and type-I heterojunction interface in SrTiO3/CZTS/Ag nanocomposite for enhanced photocatalytic degradation of organic pollutants

Templated synthesis of atomically-thin Ag nanocrystal catalysts in the interstitial space of a layered silicate

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