Clinical Studies and Reports on Colloidal Silver
This study focuses on influence of accelerator in rapidly and green synthesis of silver nanoparticles ..
What the Experts Say About Colloidal Silver!
The application of “green” chemistry rules to nanoscience and nanotechnology is very important in the preparation of various nanomaterials. In this work, we successfully developed an eco-friendly chemistry method for preparing silver nanoparticles (Ag-NPs) in natural polymeric media. The colloidal Ag-NPs were synthesized in an aqueous solution using silver nitrate, gelatin, and glucose as a silver precursor, stabilizer, and reducing agent, respectively. The properties of synthesized colloidal Ag-NPs were studied at different reaction times. The ultraviolet-visible (UV-vis) spectra were in excellent agreement with the obtained nanostructure studies performed by transmission electron microscopy (TEM) and their size distributions. The prepared samples were also characterized by X-ray diffraction (XRD) and atomic force microscopy (AFM). The use of eco-friendly reagents, such as gelatin and glucose, provides green and economic attributes to this work.
A simple, environmentally friendly and cost-effective synthetic method has been developed to prepare highly stable aqueous colloidal solutions of small (2–14 nm) silver nanoparticles using aminocellulose (AMC) as a combined reducing and capping reagent. The effects of temperature, reaction time, the concentration of silver nitrate and AMC are systematically investigated and the reaction conditions optimised. The AMC-stabilized silver nanoparticles can be deposited on the surfaces of cotton fibres and microporous cellulose acetate (CA) filters, without affecting the permeability of the filters. The AMC-stabilized aqueous silver colloidal solutions and silver nanoparticle coated CA filters and cotton fibres all show significant antibacterial action against all the bacterial isolates tested, with the antibacterial levels between “Sufficient” and “Good”, although some of solutions have been stored at room temperature for 18 months.
Journal of Nanoscience and Nanotechnology
Massive numbers of plant species are available in nature, and many of them have huge potential for the production of nanomaterials. For the syntheses of nanoparticles employing plants can be advantageous over other biological entities which can overcome the time consuming process of employing microbes and maintaining their culture which can lose their potential towards synthesis of nanoparticles. And the advantages of using plants for the synthesis of nanoparticles are that the plants are easily available and safe to handle and possess a large variety of active agents that can promote the reduction of silver ions. Most of the plant parts like leaves, roots, latex, bark, stem, and seeds are being used for nanoparticle synthesis. Green synthesis silver nanoparticles using plant extracts provides benefits over chemical and physical method as it is economical, energy efficient, cost effective; provide healthier work places and communities, protecting human health and environment leading to lesser waste and safer products. This eco-friendly method can potentially be used in various areas, including pharmaceuticals, cosmetics, foods, and medical applications. Hence in this regard; use of plant extract for synthesis can form an immense impact in coming decades.
Gole A  reported that the reduction of silver ions occurred when silver nitrate solution was treated with aqueous extract of Cocus nucifera coir at 60°C, particle synthesised with range of the size as 23± 2 nm and face centred cubic silver nanoparticles obtained.
Regional Centre of Advanced Technologies and Materials
Silver nanoparticles are being used in numerous technologies and incorporated into a wide array of consumer products that take advantage of their desirable optical, conductive, and antibacterial properties. Silver nanoparticles have attained a special focus due to its antimicrobial property. Conventionally silver nanoparticles are synthesized by chemical method using chemicals as reducing agents which later on become accountable for various biological risks due to their general toxicity; engendering the serious concern to develop environment friendly processes. Thus, to solve the objective; principles of green chemistry have now become a torch for chemical technologist, biotechnologist and nanotechnologist worldwide in developing less hazardous chemicals. The present review explores the synthesis of silver nanoparticles through a natural and single step protocol preparatory method using the different plant products of different texa belonging to different families with green principles over the conventional ones.
(2013)Synthesis and antibacterial effects of aqueous colloidal solutions of silver nanoparticles using aminocellulose as a combined reducing and capping reagent Green Chemistry, 15 (4). pp. 989-998.
Strategies for Preparing Albumin-based Nanoparticles …
Nanocomposites: synthesis, structure, properties and …
Copper nanoparticles stabilized by reduced graphene …
Today the synthesis of silver nanoparticles is very common due to their numerous applications in various fields
MATERIALS EXPRESS - American Scientific Publishers
Silver - Wikipedia
How to cite this article: An FF, Zhang XH
The chemical reduction method is commonly used to prepare Ag NPs in industrial applications because of its great advantages in generating high yields and readiness to perform the method . However, this method is one of the conventional methods that employs many chemical agents, and thus, making it hazardous to environment. Following this, the green synthesis method is much more suitable to be used in preparing Ag NPs as it is relatively more environmentally friendly. Hence, based on the principle of green synthesis , Cts and PEG were used as the stabilizer and solid support to prepare the silver nanoparticles in this work.
Cellulose Chemistry and Technology
This paper presents the green synthesis of silver nanoparticles (Ag NPs) in aqueous medium. This method was performed by reducing AgNO3 in different stirring times of reaction at a moderate temperature using green agents, chitosan (Cts) and polyethylene glycol (PEG). In this work, silver nitrate (AgNO3) was used as the silver precursor while Cts and PEG were used as the solid support and polymeric stabilizer. The properties of Ag/Cts/PEG nanocomposites (NCs) were studied under different stirring times of reaction. The developed Ag/Cts/PEG NCs were then characterized by the ultraviolet-visible (UV-Vis) spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy.
Cellulose Chemistry and Tehnology ..
AB - This study focuses on influence of accelerator in rapidly and green synthesis of silver nanoparticles (Ag-NPs) with the natural polymeric matrix. Silver nitrate, sodium alginate (Na-Alg) and sodium hydroxide have been used as silver precursor, stabilizer/reducing agent, and accelerator reagent, respectively. The resulting products have been confirmed to be Ag-NPs smaller than 20 nm using powder X-ray diffraction (PXRD), UV-visible spectroscopy (UV-vis), Fourier transform infrared (FT-IR) spectroscopy as well as transmission electron microscopy (TEM) and scanning electron microscopy. The colloidal solutions of Ag-NPs obtained at different volumes of NaOH show strong and different surface plasmon resonance (SPR) peaks, which can be explained from the TEM images of Ag-NPs and their particle size distribution. Compared with other synthetic methods, this work is rapid, green and simple to use. The newly prepared Ag-NPs may have many potential applications in chemical pharmaceutical and food industries.
Surface modification, functionalization and …
N2 - This study focuses on influence of accelerator in rapidly and green synthesis of silver nanoparticles (Ag-NPs) with the natural polymeric matrix. Silver nitrate, sodium alginate (Na-Alg) and sodium hydroxide have been used as silver precursor, stabilizer/reducing agent, and accelerator reagent, respectively. The resulting products have been confirmed to be Ag-NPs smaller than 20 nm using powder X-ray diffraction (PXRD), UV-visible spectroscopy (UV-vis), Fourier transform infrared (FT-IR) spectroscopy as well as transmission electron microscopy (TEM) and scanning electron microscopy. The colloidal solutions of Ag-NPs obtained at different volumes of NaOH show strong and different surface plasmon resonance (SPR) peaks, which can be explained from the TEM images of Ag-NPs and their particle size distribution. Compared with other synthetic methods, this work is rapid, green and simple to use. The newly prepared Ag-NPs may have many potential applications in chemical pharmaceutical and food industries.
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