Amine-functionalized, silver-exchanged zeolite NaY: Preparation, characterization and antibacterial activity

Hanim, Siti Aishah Mohd; Malek, Nik Ahmad Nizam Nik; Ibrahim, Zaharah

doi:10.1016/j.apsusc.2015.11.010

Cited by 61 publications

(27 citation statements)

References 44 publications

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“…The peaks of BC-AgZ at 980 cm À1 (asymmetric vibration of Si-O) suggest the presence of a three-dimensional silica phase within the zeolite structure and the peak at 665 cm À1 (symmetric stretch) may be contributed by the internal vibrations of the tetrahedral framework (Shameli et al, 2011). FTIR spectra of zeolites reveal the occurrence of a large, intense band at 986 cm À1 corresponding to the vibration of the Si-O-Si (Hanim et al, 2016), whereas the peak at 676 cm À1 may be due to the bending of Al-O bonds within the zeolite structure (Shameli et al, 2011). Additionally, peaks occurring within the region of 420-500 cm À1 may also indicate internal vibrations due to the bending of the T-O tetrahedra, e.g.…”

Section: Discussionmentioning

confidence: 99%

Characterisation andin vitroantimicrobial activity of biosynthetic silver-loaded bacterial cellulose hydrogels

Gupta

Low

Britland

et al. 2016

Journal of Microencapsulation

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Wounds that remain in the inflammatory phase for a prolonged period of time are likely to be colonised and infected by a range of commensal and pathogenic microorganisms. Treatment associated with these types of wounds mainly focuses on controlling infection and providing an optimum environment capable of facilitating re-epithelialisation, thus promoting wound healing. Hydrogels have attracted vast interest as moist wound-responsive dressing materials. In the current study, biosynthetic bacterial cellulose hydrogels synthesised by Gluconacetobacter xylinus and subsequently loaded with silver were characterised and investigated for their antimicrobial activity against two representative wound infecting pathogens, namely S. aureus and P. aeruginosa. Silver nitrate and silver zeolite provided the source of silver and loading parameters were optimised based on experimental findings. The results indicate that both AgNO and AgZ loaded biosynthetic hydrogels possess antimicrobial activity (p < .05) against both S. aureus and P. aeruginosa and may therefore be suitable for wound management applications.

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Section: Discussionmentioning

confidence: 99%

Characterisation andin vitroantimicrobial activity of biosynthetic silver-loaded bacterial cellulose hydrogels

Gupta

Low

Britland

et al. 2016

Journal of Microencapsulation

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“…80 Silver (Ag) has been highlighted among other inorganic metals due to introducing the most well-established antibacterial properties. To guarantee the long-term antibacterial activity of Ag NPs, they were incorporated to zeolite media, 79,[81][82][83][84][85][86][87][88][89][90] as zeolite particles could hold silver ions and protect their bacteriostatic properties which lie on their ion-exchangeable sites, and this depends on composition of the selected zeolite, eg, A zeolite, X zeolite, Y zeolite, etc. 30 Based on a research by Dong et al on the antibacterial properties of Ag-containing nanozeolites, E. coli cells were immediately destroyed upon exposure to water forms of ultra-small EMT-type zeolite containing Ag0 or Ag+ ion.…”

Section: Zeolite and Antibacterial Agentsmentioning

confidence: 99%

<p>Biomedical Applications of Zeolitic Nanoparticles, with an Emphasis on Medical Interventions</p>

Derakhshankhah¹,

Jafari²,

Sarvari³

et al. 2020

IJN

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The advent of porous materials, in particular zeolitic nanoparticles, has opened up unprecedented putative research avenues in nanomedicine. Zeolites with intracrystal mesopores are low framework density aluminosilicates possessing a regular porous structure along with intricate channels. Their unique physiochemical as well as physiological parameters necessitate a comprehensive overview on their classifications, fabrication platforms, cellular/ macromolecular interactions, and eventually their prospective biomedical applications through illustrating the challenges and opportunities in different integrative medical and pharmaceutical fields. More particularly, an update on recent advances in zeolite-accommodated drug delivery and the prevalent challenges regarding these molecular sieves is to be presented. In conclusion, strategies to accelerate the translation of these porous materials from bench to bedside along with common overlooked physiological and pharmacological factors of zeolite nanoparticles are discussed and debated. Furthermore, for zeolite nanoparticles, it is a matter of crucial importance, in terms of biosafety and nanotoxicology, to appreciate the zeolite-bio interface once the zeolite nanoparticles are exposed to the biomacromolecules in biological media. We specifically shed light on interactions of zeolite nanoparticles with fibrinogen and amyloid beta which had been comprehensively investigated in our recent reports. Given the significance of zeolite nanoparticles' interactions with serum or interstitial proteins conferring them new biological identity, the preliminary approaches for deeper understanding of administration, distribution, metabolism and excretion of zeolite nanoparticles are elucidated.

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“…Zeolites have been used in antimicrobial applications after ion-exchange of an antimicrobial metal, most often silver [9][10][11][12][13][14][15][16]. Owing to their microporosity and high surface areas, silver-exchanged zeolites slowly release silver ions in solution, creating a material with long-term antimicrobial activity [17].…”

Section: Introductionmentioning

confidence: 99%

Application of Cu-FAU nanozeolites for decontamination of surfaces soiled with the ESKAPE pathogens

Redfern

Goldyn

Retoux

et al. 2017

Microporous and Mesoporous Materials

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Antimicrobial resistance is a global threat with catastrophic forecasts in terms of human and economic losses. The so-called ESKAPE pathogens (Enterococcus species, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumanii, Pseudomonas aeruginosa and Enterobacter species) represent a range of species of particular concern because they cause many serious hospital infections, and can show resistance toward available commercial antibiotics. Copper-containing zeolite nanocrystals (10-30 nm) with FAU-type structure (Cu-FAU), in the form of stable colloidal suspensions, were prepared at high yield in the absence of organic templates and studied for their activity against ESKAPE microorganisms. The materials were active against all six ESKAPE species. The survival of Staphylococcus aureus, Klebsiella pneumoniae and Pseudomonas aeruginosa on stainless-steel coupons after direct treatment with the Cu-FAU zeolite suspensions was determined quantitatively. Complete decontamination (5-2 log reduction in bacterial counts) was achieved within 20 minutes for P. aeruginosa, and within 10 minutes for the K. pneumoniae and S. aureus. This result is significant, particularly for sanitization of surfaces in healthcare settings, with the potential to initiate a new direction of research to help address the global antimicrobial resistance threat.

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Amine-functionalized, silver-exchanged zeolite NaY: Preparation, characterization and antibacterial activity

Cited by 61 publications

References 44 publications

Characterisation andin vitroantimicrobial activity of biosynthetic silver-loaded bacterial cellulose hydrogels

Characterisation andin vitroantimicrobial activity of biosynthetic silver-loaded bacterial cellulose hydrogels

<p>Biomedical Applications of Zeolitic Nanoparticles, with an Emphasis on Medical Interventions</p>

Application of Cu-FAU nanozeolites for decontamination of surfaces soiled with the ESKAPE pathogens

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