Synthesis and immobilization of silver nanoparticles on aluminosilicate nanotubes and their antibacterial properties

Yucelen, G. Ipek; Connell, Rachel; TerBush, Jessica R.; Westenberg, David J.; Doğan, Fatih

doi:10.1007/s13204-015-0467-x

Cited by 20 publications

(19 citation statements)

References 36 publications

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“…The inner channel grants large specific surface area (up to 400 m 2 /g), as well as active sites for adsorption, and encapsulation of functional substance ,. The outer and inner hydrosilicates surfaces saturated with OH‐groups can be modified by various organic compounds as well as be decorated by metallic or oxide phases ,. High aspect ratio affects on particles aggregation: entangling of nanotubes and nanoscrolls is used for production of self‐supported and composite membranes ,.…”

Section: Introductionmentioning

confidence: 99%

“…[16,17] The outer and inner hydrosilicates surfaces saturated with OHgroups can be modified by various organic compounds as well as be decorated by metallic or oxide phases. [18,19] High aspect ratio affects on particles aggregation: entangling of nanotubes and nanoscrolls is used for production of self-supported and composite membranes. [20,21] Individual nanoscrolls demonstrate good mechanical properties, [22,23] which are appropriate for reinforcement of polymer composites.…”

Section: Introductionmentioning

confidence: 99%

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Cation Redistribution along the Spiral of Ni‐Doped Phyllosilicate Nanoscrolls: Energy Modelling and STEM/EDS Study

et al. 2019

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Here, we study the stress‐induced self‐organization of Mg2+ and Ni2+ cations in the crystal structure of multiwalled (Mg1–x,Nix)3Si2O5(OH)4 phyllosilicate nanoscrolls. The phyllosilicate layer strives to compensate size and surface energy difference between the metal oxide and silica sheets by curling. But as soon as the layer grows, the scrolling mechanism becomes a spent force. An energy model proposes secondary compensation of strain: two cations distribute along the nanoscroll spiral in accordance with preferable radii of curvature. To reveal this, we study synthetic (Mg1–x,Nix)3Si2O5(OH)4 nanoscrolls by the scanning transmission electron microscopy/energy‐dispersive X‐ray spectroscopy (STEM/EDS) technique. For a number of scrolls, we have found indeed a change of Ni concentration with increase in distance from the nanoscroll central axis. The concentration gradient, according to our estimates, can reach 50 at.% over 25 nm of the wall thickness.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cation Redistribution along the Spiral of Ni‐Doped Phyllosilicate Nanoscrolls: Energy Modelling and STEM/EDS Study

et al. 2019

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“…21 Additionally, silver nanoparticles were immobilized on imogolite and showed antibacterial properties. 22 It has also been shown that the phosphate groups of DNA interact with the aluminol groups on imogolite, which was utilized to form imogolite/DNA hybrid hydrogels. 23 These experiments demonstrate that imogolite is a tunable platform.…”

Section: Several Intriguing Catalysts For This Reaction Have Been Invmentioning

confidence: 99%

Utilizing imogolite nanotubes as a tunable catalytic material for the selective isomerization of glucose to fructose

Olson¹,

Deshpande²,

Gündüz³

et al. 2019

Catalysis Today

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The isomerization of glucose to fructose is an important step in the conversion of biomass to valuable fuels and chemicals. A key challenge for the isomerization reaction is achieving high selectivity towards fructose using recyclable and inexpensive catalysts. Imogolite is a singlewalled aluminosilicate nanotube characterized by surface areas of 200-400 m 2 /g and pore widths near 1 nm. In this study, imogolite nanotubes are used as a heterogeneous catalyst for the isomerization of glucose to fructose. Catalytic testing demonstrates the catalytic activity of imogolite for the isomerization of glucose to fructose. Imogolite is a highly tunable structure and can be modified through substitution of Si with Ge or through functionalization of methyl groups to the inner surface. These modifications change the surface properties of the nanotubes and enable tuning of the catalytic performance. Aluminosilicate imogolite is the most active material for the conversion of glucose. Conversion of glucose of 30% and selectivity for fructose of 45% is achieved using aluminosilicate imogolite. Modification of imogolite with germanium or methyl groups decreases the conversion, but increases the selectivity. Generally, the selectivity for fructose decreases as the conversion of glucose increases. Interestingly, the imogolite nanotubes have comparable catalytic selectivity at similar conversion as base catalyzed reactions. Catalyst recycling experiments revealed that organic content accumulates on the nanotubes that results in a minor reduction in conversion while maintaining similar catalytic selectivity. Overall, imogolite nanotubes demonstrate an active and tunable catalytic platform for the isomerization of glucose to fructose.

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“…In that case, imogolite nanotubes in aqueous media act as a solid support, being effective to stabilize the formation of Pt, Au, Ag and bimetallic nanoparticles [181,182]. These results pave the way towards potential uses of imogolite nanotubes for water treatment [183][184][185][186], antimicrobial agents [187,188], transparent dressings [189] and for catalysis applications [190].…”

Section: Environment Fieldmentioning

confidence: 99%

Nanomaterials From Imogolite: Structure, Properties, and Functional Materials

Paineau

Launois

2019

Nanomaterials From Clay Minerals

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Hollow cylinders with a diameter in the nanometer range are carving out prime positions in nanoscience. Thanks to their physico-chemical properties, they could be key elements for next-generation nanofluidics devices, for selective molecular sieving, energy conversion or as catalytic nanoreactors. Several difficult problems such as fine diameter and interface control are solved for imogolite nanotubes. This chapter will present an overview of this unique class of clay nanotubes, from their geological occurrence to their synthesis and their applications. In particular, emphasis will be put on providing an up-to-date description of their structure and properties, their synthesis and the strategies developed to modify their interfaces in a controlled manner. Developments on their applications, in particular for polymer/imogolite nanotubes composites, molecular confinement or catalysis, are presented.

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Synthesis and immobilization of silver nanoparticles on aluminosilicate nanotubes and their antibacterial properties

Cited by 20 publications

References 36 publications

Cation Redistribution along the Spiral of Ni‐Doped Phyllosilicate Nanoscrolls: Energy Modelling and STEM/EDS Study

Cation Redistribution along the Spiral of Ni‐Doped Phyllosilicate Nanoscrolls: Energy Modelling and STEM/EDS Study

Utilizing imogolite nanotubes as a tunable catalytic material for the selective isomerization of glucose to fructose

Nanomaterials From Imogolite: Structure, Properties, and Functional Materials

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