Novel synthesis of silver nanoparticles using 2,3,5,6-tetrakis-(morpholinomethyl) hydroquinone as reducing agent

2012 ◽  
Vol 95 ◽  
pp. 305-309 ◽  
Author(s):  
P. Manivel ◽  
A. Balamurugan ◽  
N. Ponpandian ◽  
D. Mangalaraj ◽  
C. Viswanathan
Keyword(s):  
Silver Nanoparticles ◽  
Reducing Agent ◽  
Novel Synthesis

scholarly journals Development of antibacterial and UV protective cotton fabrics using plant food waste and alien invasive plant extracts as reducing agents for the in-situ synthesis of silver nanoparticles

Cellulose ◽  
2021 ◽  
Author(s):  
Nina Čuk ◽  
Martin Šala ◽  
Marija Gorjanc
Keyword(s):  
Silver Nanoparticles ◽  
Green Tea ◽  
Food Waste ◽  
Cotton Fabrics ◽  
Reducing Agent ◽  
Plant Food ◽  
Japanese Knotweed ◽  
Tea Leaves ◽  
Green Tea Leaves

Abstract The development of cellulose-based textiles that are functionalised with silver nanoparticles (AgNP), synthesised according to a green approach, and offer protection against ultraviolet (UV) radiation and pathogenic bacteria is very important today. In the present work we demonstrate the environmentally friendly approach to obtain such textile material by AgNP synthesis directly (in-situ) on cotton fabrics, using water extracts of plant food waste (green tea leaves, avocado seed and pomegranate peel) and alien invasive plants (Japanese knotweed rhizome, goldenrod flowers and staghorn sumac fruit) as reducing agents. The extracts were analysed for their total content of phenols and flavonoids and their antioxidant activity. The synthesised AgNP on cotton were round, of different size and amount depending on the reducing agent used. The highest amount of AgNP was found for samples where Japanese knotweed rhizome extract was used as reducing agent and the lowest where extracts of goldenrod flowers and green tea leaves were used. Regardless of the reducing agent used to form AgNP, all cotton samples showed excellent protection against E. coli and S. aureus bacteria and against UV radiation with UV protection factor values above 50. The best results for UV protection even after the twelve repetitive washing cycles were found for the sample functionalized with AgNP synthesised with an extract of the Japanese knotweed rhizome. Due to the presence of AgNP on cotton, the air permeability and thermal conductivity decreased. AgNP had no effect on the change in breaking strength or elongation of fabrics. Graphic abstract

Fast and Eco-friendly Microwave-Assisted Synthesis of Silver Nanoparticles using Rosemary Essential Oil as Renewable Reducing Agent.

2017 ◽  
Vol 2 (6) ◽  
pp. 2131-2138 ◽  
Author(s):  
José González-Rivera ◽  
Celia Duce ◽  
Vincenzo Ierardi ◽  
Iginio Longo ◽  
Alessio Spepi ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Essential Oil ◽  
Reducing Agent ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Rosemary Essential Oil

scholarly journals Effect of pH on Size and Concentration of Silver Nanoparticles Synthesized using Ixora coccinea Linn. Leaf Extracts

2020 ◽  
Vol 36 (6) ◽  
pp. 1103-1106
Author(s):  
Darwin F. Reyes ◽  
Gil Fabien S. Cabrera ◽  
Shemma Mica V. Mata ◽  
azmin Pariz D. San Pedro ◽  
add Christian C. Palioc ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Cost Effective ◽  
The Philippines ◽  
Reducing Agent ◽  
Leaf Extracts ◽  
Reaction Conditions ◽  
Effect Of Ph ◽  
Ixora Coccinea ◽  
Ornamental Shrub

The synthesis of silver nanoparticles via plant-mediated approach is an emerging area of research interest worldwide. The procedure is cost-effective and does not require the use of toxic chemicals and complicated reaction conditions. In the present investigation, silver nanoparticles were prepared using the leaf extracts of Ixora coccinea Linn., a common ornamental shrub in the Philippines, as the reducing agent. The effect of pH on the synthesis was investigated, and results showed that the quality of the synthesized silver nanoparticles changes in varying pH of the reducing agent.

A novel synthesis of ultra thin graphene sheets for energy storage applications using malonic acid as a reducing agent

2014 ◽  
Vol 2 (47) ◽  
pp. 20345-20357 ◽  
Author(s):  
Anil Kumar ◽  
Mahima Khandelwal
Keyword(s):  
Energy Storage ◽  
Potential Energy ◽  
Specific Capacitance ◽  
Malonic Acid ◽  
High Specific Capacitance ◽  
Reducing Agent ◽  
Graphene Sheets ◽  
Novel Synthesis ◽  
Energy Storage Applications ◽  
Charge Discharge

Novel ultrathin graphene sheets (0.41 ± 0.03 nm) with increased sp2 character, high specific capacitance and charge–discharge capability have been synthesized and demonstrated to have potential energy storage applications.

scholarly journals Stabilization of Silver Nanoparticles by Cationic Aminoethyl Methacrylate Copolymers in Aqueous Media—Effects of Component Ratios and Molar Masses of Copolymers

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1647 ◽  
Author(s):  
Mikhailova ◽  
Senchukova ◽  
Lezov ◽  
Gubarev ◽  
Trützschler ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Analytical Ultracentrifugation ◽  
Silver Salt ◽  
Aqueous Media ◽  
Reducing Agent ◽  
Methacrylate Copolymers ◽  
Vis Spectroscopy ◽  
Cationic Copolymers ◽  
Consistent Information ◽  
Scanning Electron

The ability of aminoethyl methacrylate cationic copolymers to stabilize silver nanoparticles in water was investigated. Sodium borohydride (NaBH4) was employed as a reducing agent for the preparation of silver nanoparticles. The objects were studied by ultraviolet-visible (UV-vis) spectroscopy, dynamic light scattering (DLS), analytical ultracentrifugation (AUC) and scanning electron microscopy (SEM). Formation of nanoparticles in different conditions was investigated by varying ratios between components (silver salt, reducing agent and polymer) and molar masses of copolymers. As a result, we were successful in obtaining nanoparticles with a relatively narrow size distribution that were stable for more than six months. Consistent information on nanoparticle size was obtained. The holding capacity of the copolymer was studied.

Electrolytic Behavior Silver Microphases and Nanophases on the Graphite Electrode Surface

2016 ◽  
Vol 712 ◽  
pp. 117-122 ◽  
Author(s):  
Daria O. Perevezentseva ◽  
Eduard Gorchakov ◽  
Yulia A. Oskina
Keyword(s):  
Silver Nanoparticles ◽  
Silver Oxide ◽  
Graphite Electrode ◽  
Reducing Agent ◽  
Molar Ratio ◽  
Graphite Electrodes ◽  
Stepwise Mechanism ◽  
Voltage Curve ◽  
Current Voltage ◽  
Current Voltage Curve

The stepwise mechanism of electrooxidation and reduction of silver nanophases and microphases is proposed on the graphite electrodes surface in alkaline medium. The electrochemical splitting of silver nanophases peak is observed on the anodic branch of the cyclic current-voltage curve. There is the shoulder at E = 0.2 V on the he anodic branch of cyclic current-voltage curve. The appearance of additional cathodic wave at E = -0.08 V is observed on the cathodic branch of the cyclic current-voltage curve that is caused by the reduction of silver nanoparticles. The additional cathode maximum is represented at 0.3 V on the cathodic branch of the cylic current-voltage curves of only silver nanophases. This effect is associated the catalytic process of decomposition of hydrogen peroxide on silver nanoparticles surface. The offset of the cathodic maxima of current-voltage curves of silver nanophases obtained with an excess of a reducing agent are observed to more negative potentials. There is a significant decrease of the all currents maxima compared to silver nanophases obtained with an equal molar ratio of reactants. These results may be connected with the formation of silver oxide monolayers in the different oxidation in the presence of large amounts a reducing agent. The excess of the reducing agent required for the preparation of silver nanoparticles leads to decrease of the cathodic maximum of silver nanoparticles

Synthesis of Silver Nanoparticles Using o-Hydroxybenzoic, p-Hydroxybenzoic, and o,p-Dihydroxybenzoic Acids as Reducing Agents

2017 ◽  
Vol 901 ◽  
pp. 26-31 ◽  
Author(s):  
Dian Susanthy ◽  
Fadliah ◽  
Endang Tri Wahyuni ◽  
Sri Juari Santosa
Keyword(s):  
Particle Size ◽  
Silver Nanoparticles ◽  
Reducing Agents ◽  
Reducing Agent ◽  
Para Position ◽  
Hydroxyl Groups ◽  
Hydroxybenzoic Acid ◽  
Dihydroxybenzoic Acid ◽  
Transmission Electron ◽  
Shape And Size

Synthesis of silver nanoparticles (AgNPs) by reduction of AgNO3 with o-hydroxybenzoic, p-hydroxybenzoic and o,p-dihydroxybenzoic acids as reducing agents was investigated. This research was conducted to determine the effect of the position and number of hydroxyl groups towards the size, shape and stability of the resulted AgNPs. Surface Plasmon Resonance (SPR) of AgNPs was characterized by UV/Vis spectrophotometer, the shape and size of AgNPs was determined by Transmission Electron Microscope (TEM). The results showed that the reducing agent that has substituents in the para position (p-hydroxybenzoic acid) has the higher reduction ability than the others. AgNPs were yielded by all types of reducing agents in alkaline system. Reducing agents which have greater number of substituents (o,p-dihydroxybenzoic acid) could produce AgNPs with smaller concentration of AgNO3 than the others. AgNPs that was produced by reducing agent having substituents on the para position (p-hydroxybenzoic acid) was more stable and smaller particle size, i.e. 34 ± 1.78 nm than reducing agent that has substituent on the ortho para positions (with particle size 45 + 3.67 nm) and ortho positions (with particle size 70 ± 4.96 nm).

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