Synthesis, characterization and electrochemical properties of composites synthesized from silver-tannic acid hybrid nanoparticles and different clays

Batista, Felipe Alves; Nascimento, Steffane Quaresma; Sousa, A. B.; Júnior, Elizio F.R.; Pereira, Pedro I. de Almeida; Fontenele, Vanessa M.; Filho, Edson Cavalcanti da Silva; Magalhães, Janildo Lopes; Luz, Roberto A. S.; Cantanhêde, Welter; Mendes, Anderson Nogueira

doi:10.1016/j.clay.2019.105219

Cited by 16 publications

(9 citation statements)

References 39 publications

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“…The three clay minerals exhibited characteristic bands in similar regions and were differentiated by the intensities and bandwidths in the main areas that characterize the materials. These areas are related to tetrahedral sheets Si-O-Si (950–1250 cm −1 ) and M-OH octahedral (M indicates a metal, e.g., Al–Al–OH, Mg–Mg–OH, Al–Fe–OH) that appear in the low-wavelength region as well as bands attributed to hydroxyls and water molecules that appear between 3200–3440 cm −1 and 1650 cm −1 , respectively [22,24,32,34,35,36,37,38,39].…”

Section: Resultsmentioning

confidence: 99%

Understanding Urea Encapsulation in Different Clay Minerals as a Possible System for Ruminant Nutrition

et al. 2019

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Considering the challenges of urea administration due to the high ureolytic activity of the rumen and the importance of its use, as well as taking into account the relevance of sustainably exploiting the technological potential of biodiversity, this research studies the encapsulation of urea in different clay minerals (palygorskite (Pal), sepiolite (Sep), and Veegum® (V)) as an alternative for use as nonprotein nitrogen (NNP) sources. A method of incorporation was developed in which the encapsulation of urea was proven by X-ray diffraction; fibrous materials, Pal and Sep had similar characteristics due to the decrease in the relative plane intensity (011), suggesting a decrease in the order of their stacking due to the presence of urea on the surface or inside channels. By contrast, V showed a 7.74° reflection shift, suggesting an increase in basal spacing from 11.45 Å in V to 14.88 Å in the sample after urea encapsulation. By thermogravimetry, it was observed that the presence of urea did not change the mass-loss profiles but only increased the percentage of loss in respective events, indicating urea incorporation in the clay minerals. These results provide a promising alternative for administering NNP sources in the ruminant diet.

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Section: Resultsmentioning

confidence: 99%

Understanding Urea Encapsulation in Different Clay Minerals as a Possible System for Ruminant Nutrition

et al. 2019

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“…In general, tannins form metal chelation complexes with a broad variety of metal ions, whereby the tannin functions as a reducing as well as stabilizing agent [ 40 , 41 ]. Furthermore, the tannin–metal complex formation is significantly influenced by the initial pH value [ 38 ].…”

Section: Hybrid Materialsmentioning

confidence: 99%

“…Apart from iron, also other metal ions have been investigated for their suitability to form tannin–metal hybrids. For example, the generation of stable silver nanoparticles can be carried out by mixing AgNO 3 and tannic acid, which functions as a reducing as well as a stabilizing agent of the respective metal ions [ 41 , 65 , 66 ]. Tannic acid stabilized silver nanoparticles feature an antimicrobial activity as well as electrical conductivity and can be used when immobilized to clays for electrochemical studies [ 41 ], as an antileishmanial active agent against Leishmania (a severe parasitic infection) [ 65 ], or as an antiviral agent against the Herpes Simplex Virus Infection-Type 2 [ 66 ].…”

Section: Hybrid Materialsmentioning

confidence: 99%

Tannin-Based Hybrid Materials and Their Applications: A Review

et al. 2020

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Tannins are eco-friendly, bio-sourced, natural, and highly reactive polyphenols. In the past decades, the understanding of their versatile properties has grown substantially alongside a continuously broadening of the tannins’ application scope. In particular, recently, tannins have been increasingly investigated for their interaction with other species in order to obtain tannin-based hybrid systems that feature advanced and/or novel properties. Furthermore, in virtue of the tannins’ chemistry and their high reactivity, they either physicochemically or physically interact with a wide variety of different compounds, including metals and ceramics, as well as a number of organic species. Such hybrid or hybrid-like systems allow the preparation of various advanced nanomaterials, featuring improved performances compared to the current ones. Consequently, these diverse-shaped materials have potential use in wastewater treatment or catalysis, as well as in some novel fields such as UV-shielding, functional food packaging, and biomedicine. Since these kinds of tannin-based hybrids represent an emerging field, thus far no comprehensive overview concerning their potential as functional chemical building blocks is available. Hence, this review aims to provide a structured summary of the current state of research regarding tannin-based hybrids, detailed findings on the chemical mechanisms as well as their fields of application.

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“…3 However, montmorillonite clay has been extensively used in the production of hybrids and composites because its layered structure is joined together by weak van der Waals and electrostatic forces, making it easy to modify. 4,5 The interlayer space of montmorillonite clay act as the adsorbent for cationic ions, and as a support for binding transition metal complex catalysts in the synthesis of material and biomaterial nanoparticles. 6 Clay-modied electrodes provide high chemical stability, good biocompatibility, increased analyte mobility, good ion exchange, swelling and adsorption capacity, and increased product mobility.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, silver has been selected due to its antimicrobial activity, rapid charge and mass transport, cost-effectiveness with high specic surface area, and good electrical conductivity compared to other metals. 4,7 Nanocomposites can be classied as ceramic, metallic, and polymer-based nanocomposites, according to their matrix and structural differences. 3,9 Furthermore, polymers that have good physical and chemical properties are the most applied nanocomposites, which could be due to the shape, size, concentration, and interaction of the incorporated nanoparticles with the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

The impact of silver nanoclay functionalisation on optical and electrochemical properties

2023

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Synthesis, characterization and electrochemical properties of composites synthesized from silver-tannic acid hybrid nanoparticles and different clays

Cited by 16 publications

References 39 publications

Understanding Urea Encapsulation in Different Clay Minerals as a Possible System for Ruminant Nutrition

Understanding Urea Encapsulation in Different Clay Minerals as a Possible System for Ruminant Nutrition

Tannin-Based Hybrid Materials and Their Applications: A Review

The impact of silver nanoclay functionalisation on optical and electrochemical properties

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