Nanosilver rainbow: a rapid and facile method to tune different colours of nanosilver through the controlled synthesis of stable spherical silver nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (54) ◽  
pp. 48792-48799 ◽  
Author(s):  
Pramujitha Mendis ◽  
Rohini M. de Silva ◽  
K. M. Nalin de Silva ◽  
Lahiru A. Wijenayaka ◽  
Kalana Jayawardana ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Silver Nanoparticles ◽  
Optical Properties ◽  
Ambient Temperature ◽  
Controlled Synthesis ◽  
One Pot

A rapid and simple one-pot reaction to synthesize stable, spherically shaped silver nanoparticles of different sizes producing distinct optical properties in aqueous solution at ambient temperature has been developed.

scholarly journals One-pot preparation of poly(styrene-co-divinylbenzene)/silver nanoparticles composite microspheres with tunable porosity and their catalytic degradation of methylene blue in aqueous solution

RSC Advances ◽  
2017 ◽  
Vol 7 (79) ◽  
pp. 50176-50187 ◽  
Author(s):  
Xiaohuan Ji ◽  
Franziska Griesing ◽  
Ruijia Yan ◽  
Bin Sun ◽  
Werner Pauer ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Silver Nanoparticles ◽  
Silver Nanoparticle ◽  
Catalytic Degradation ◽  
One Pot ◽  
Composite Microspheres ◽  
Polymerization Method ◽  
Porous Poly

Porous poly(styrene-co-divinylbenzene)/silver nanoparticle composite spheres with tunable porosity were synthesized by seed swelling polymerization method and show a great catalytic degradation of methylene blue within NaBH4.

scholarly journals One pot synthesis of silver nanoparticles using a cyclodextrin containing polymer as reductant and stabilizer

2014 ◽  
Vol 5 ◽  
pp. 380-385 ◽  
Author(s):  
Arkadius Maciollek ◽  
Helmut Ritter
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Silver Nanoparticles ◽  
Optical Properties ◽  
Silver Nitrate ◽  
Room Temperature ◽  
One Pot ◽  
One Pot Synthesis ◽  
Transmission Electron ◽  
Vis Spectroscopy

A facile and one pot synthesis of silver nanoparticles with narrow size distributions using silver nitrate and a copolymer 1 from N-isopropylacrylamide (NIPAM) and mono-(1H-triazolylmethyl)-2-methylacryl-β-cyclodextrin acting as reductant and stabilizer without using any additional reducing agent is reported. The reduction was carried out in aqueous solution under pH neutral conditions at room temperature. The results of dynamic light scattering analysis and transmission electron microscopy show adjustable particle sizes from 30–100 nm, due to variation of silver nitrate concentration, the polymeric reducing and stabilisation agent concentration or reaction time. The spherical structure of the silver nanoparticles has been confirmed by UV–vis spectroscopy and transmission electron microscopy. The optical properties of the nanoparticles have also been characterized by fluorescence spectroscopy. The formed spherical particles are stable in aqueous medium at room temperature over a period of several weeks. Furthermore the changes in the optical properties of the nanoparticles due to thermo induced volume phase transition behavior of the thermoresponsive cyclodextrin containing polymer 1 have been characterized by UV–vis spectroscopy.

scholarly journals Antibacterial Finishing of Tencel/Cotton Nonwoven Fabric Using Ag Nanoparticles-Chitosan Composite

2012 ◽  
Vol 7 (2) ◽  
pp. 155892501200700 ◽  
Author(s):  
Youbo Di ◽  
Qingshan Li ◽  
Xupin Zhuang
Keyword(s):  
Aqueous Solution ◽  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Ambient Temperature ◽  
Ag Nanoparticles ◽  
Nonwoven Fabric ◽  
Air Permeability ◽  
Microcrystalline Chitosan ◽  
20 Nm ◽  
Chitosan Composite

A silver nanoparticles-chitosan composite was prepared using a microcrystalline chitosan gelatinous water dispersion at ambient temperature and its aqueous solution was applied to the antibacterial finishing of Tencel/cotton nonwoven fabric. The size distribution of silver nanoparticles (AgNPs) was between 4 to 20 nm showed good stability in aqueous solution. The finished nonwoven fabric showed excellent water absorption ability, air permeability and antibacterial activity against E.coli.

scholarly journals Optical properties and fluorescence quenching of carbazole containing (D–π–A) push–pull chromophores by silver nanoparticles: a detailed insight via an experimental and theoretical approach

RSC Advances ◽  
2017 ◽  
Vol 7 (14) ◽  
pp. 8402-8414 ◽  
Author(s):  
Abdullah M. Asiri ◽  
Osman I. Osman ◽  
Saad H. Al-Thaqafy ◽  
Salman A. Khan
Keyword(s):  
Silver Nanoparticles ◽  
Optical Properties ◽  
Fluorescence Quenching ◽  
Acetic Anhydride ◽  
Microwave Irradiation ◽  
Theoretical Approach ◽  
Sodium Acetate ◽  
Hippuric Acid ◽  
One Pot ◽  
The One

(4Z)-4-[(9-Ethyl-9H-carbazol-3-yl)methylidene]-2-phenyl-1,3-oxazol-5(4H)-one (ECPO) was prepared by the one-pot multi-component reaction of 9-ethyl-9H-carbazole-3-carbaldehyde, hippuric acid, anhydrous sodium acetate and acetic anhydride under microwave irradiation.

scholarly journals Controlled Synthesis of Silver Nanoparticles Using Double Reductants and Its Voltammetric Characteristics Study

2016 ◽  
Vol 11 (1) ◽  
pp. 115
Author(s):  
Yubo Duan ◽  
Zhihua Xu ◽  
Xiaochun Jiang
Keyword(s):  
Silver Nanoparticles ◽  
Sodium Borohydride ◽  
Trisodium Citrate ◽  
Controlled Synthesis ◽  
One Pot ◽  
Good Shape ◽  
Analytical Applications ◽  
Voltammetric Characteristics ◽  
Average Size ◽  
20 Nm

<p>Constructing robust silver nanoparticles (AgNPs) with good shape and dispersibility is of particular interest in analytical applications. Herein, monodispersibility AgNPs with the average size of 20 nm have been successfully prepared via one-pot method using sodium borohydride and trisodium citrate as co-reductants. The introduction of sodium borohydride greatly accelerated the rate of nucleation, which can effectively solve the problem of broad size distribution. Both shape and dispersibility of AgNPs can be effectively adjusted by simple control of refluxing time or concentrations of the sodium borohydride. We also studied the voltammetric characteristics of the AgNPs using Ag/AgCl solid-state voltammetry. An intense and stable current peak at a low potential could be obtained, which could provide a unique advantage in analytical applications.  Copyright © 2016 BCREC GROUP. All rights reserved</p><p><em>Received: 5<sup>th</sup> November 2015; Revised: 21<sup>st</sup> January 2016; Accepted: 22<sup>nd</sup> January 2016</em></p><p><strong>How to Cite</strong>: Duan, Y., Xu, Z., Jiang, X. (2016). Controlled Synthesis of Silver Nanoparticles Using Double Reductants and Its Voltammetric Characteristics Study.<em> Bulletin of Chemical Reaction Engineering &amp; Catalysis</em>, 11 (1): 115-119. (doi:10.9767/bcrec.11.1.433.115-119)</p><p><strong>Permalink/DOI</strong>: <a href="http://dx.doi.org/10.9767/bcrec.11.1.433.115-119">http://dx.doi.org/10.9767/bcrec.11.1.433.115-119</a></p><p> </p>

scholarly journals One-pot sonochemical synthesis of reduced graphene oxide uniformly decorated with ultrafine silver nanoparticles for non-enzymatic detection of H2O2 and optical detection of mercury ions

RSC Advances ◽  
2014 ◽  
Vol 4 (69) ◽  
pp. 36401-36411 ◽  
Author(s):  
A. Moradi Golsheikh ◽  
N. M. Huang ◽  
H. N. Lim ◽  
Rozalina Zakaria
Keyword(s):  
Aqueous Solution ◽  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Mercury Ions ◽  
Sonochemical Synthesis ◽  
One Pot ◽  
Simple Strategy ◽  
Ammonia Complex ◽  
Reduced Graphene ◽  
Enzymatic Detection

The ultrasonic irradiation of an aqueous solution containing a silver ammonia complex (Ag(NH3)2OH) and graphene oxide (GO) is a simple strategy for producing GO uniformly decorated with ultrafine AgNPs.

Synthesis and Kinetics of Highly Substituted Piperidines in the Presence of Tartaric Acid as a Catalyst

2018 ◽  
Vol 21 (4) ◽  
pp. 302-311
Author(s):  
Younes Ghalandarzehi ◽  
Mehdi Shahraki ◽  
Sayyed M. Habibi-Khorassani
Keyword(s):  
Ambient Temperature ◽  
Tartaric Acid ◽  
Aromatic Aldehydes ◽  
One Pot ◽  
Rate Determining Step ◽  
State Approximation ◽  
Solvent Free Conditions ◽  
Steady State Approximation ◽  
Absorbance Changes ◽  
The One

Aim & Scope: The synthesis of highly substituted piperidine from the one-pot reaction between aromatic aldehydes, anilines and β-ketoesters in the presence of tartaric acid as a catalyst has been investigated in both methanol and ethanol media at ambient temperature. Different conditions of temperature and solvent were employed for calculating the thermodynamic parameters and obtaining an experimental approach to the kinetics and mechanism. Experiments were carried out under different temperature and solvent conditions. Material and Methods: Products were characterized by comparison of physical data with authentic samples and spectroscopic data (IR and NMR). Rate constants are presented as an average of several kinetic runs (at least 6-10) and are reproducible within ± 3%. The overall rate of reaction is followed by monitoring the absorbance changes of the products versus time on a Varian (Model Cary Bio- 300) UV-vis spectrophotometer with a 10 mm light-path cell. Results: The best result was achieved in the presence of 0.075 g (0.1 M) of catalyst and 5 mL methanol at ambient temperature. When the reaction was carried out under solvent-free conditions, the product was obtained in a moderate yield (25%). Methanol was optimized as a desirable solvent in the synthesis of piperidine, nevertheless, ethanol in a kinetic investigation had none effect on the enhancement of the reaction rate than methanol. Based on the spectral data, the overall order of the reaction followed the second order kinetics. The results showed that the first step of the reaction mechanism is a rate determining step. Conclusion: The use of tartaric acid has many advantages such as mild reaction conditions, simple and readily available precursors and inexpensive catalyst. The proposed mechanism was confirmed by experimental results and a steady state approximation.

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