scholarly journals Synthesis of Copper Nanoparticles Stabilized with Organic Ligands and Their Antimicrobial Properties

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2846
Author(s):  
Noemi Jardón-Maximino ◽  
Marissa Pérez-Alvarez ◽  
Gregorio Cadenas-Pliego ◽  
Luis E. Lugo-Uribe ◽  
Christian Cabello-Alvarado ◽  
...  
Keyword(s):  
Copper Nanoparticles ◽  
Chemical Reduction ◽  
Synthesis Method ◽  
Antimicrobial Properties ◽  
Stabilizing Agents ◽  
Copper Sulfate Pentahydrate ◽  
The Stability ◽  
High Yields ◽  
Zeta Potential Analysis

In this work, we report the synthesis of copper nanoparticles (Cu NPs), employing the chemical reduction method in an aqueous medium. We used copper sulfate pentahydrate (CuSO4·5H2O) as a metallic precursor; polyethylenimine (PEI), allylamine (AAM), and 4-aminobutyric acid (AABT) as stabilizing agents; and hydrated hydrazine as a reducing agent. The characterization of the obtained nanoparticles consisted of X-ray, TEM, FTIR, and TGA analyses. Through these techniques, it was possible to detect the presence of the used stabilizing agents on the surface of the NPs. Finally, a zeta potential analysis was performed to differentiate the stability of the nanoparticles with a different type of stabilizing agent, from which it was determined that the most stable nanoparticles were the Cu NPs synthesized in the presence of the PEI/AAM mixture. The antimicrobial activity of Cu/PEI/AABT toward P. aeruginosa and S. aureus bacteria was high, inhibiting both bacteria with low contact times and copper concentrations of 50–200 ppm. The synthesis method allowed us to obtain Cu NPs free of oxides, stable to oxidation, and with high yields. The newly functionalized Cu NPs are potential candidates for antimicrobial applications.

scholarly journals Synthesis of Copper Nanoparticles Coated with Nitrogen Ligands

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Rubén Sierra-Ávila ◽  
Marissa Pérez-Alvarez ◽  
Gregorio Cadenas-Pliego ◽  
Carlos Alberto Ávila-Orta ◽  
Rebeca Betancourt-Galindo ◽  
...  
Keyword(s):  
Copper Nanoparticles ◽  
Metallic Copper ◽  
Good Alternative ◽  
Average Particle ◽  
Chemical Methods ◽  
Nitrogen Ligands ◽  
Copper Sulfate Pentahydrate ◽  
Wet Chemical ◽  
High Yields ◽  
Thermal Stability Of

The synthesis of copper nanoparticles was studied by wet chemical methods using copper sulfate pentahydrate (CuSO4·5H2O) and nitrogen ligands allylamine (AAm) and polyallylamine (PAAm) as stabilizers. The results suggest that the use of these ligands leads to the exclusive formation of metallic copper nanoparticles (Cu-NPs). The use of partially crosslinked polyallylamine (PAAmc) leads to nanoparticles (NPs) with low yields and high coating content, while linear PAAm leads to NPs with high yields and low coating content. The chemical composition of the particles was determined by XRD and average particle diameters were determined by the Debye-Scherrer equation. TGA analysis provided evidence of the content and thermal stability of the coating on the nanoparticles and PAAm. The morphology, particle size distribution, and presence of PAAm coating were observed through TEM. The use of AAm in the synthesis of NPs could be a good alternative to reduce costs. By using TGA, TEM, and DSC techniques, it was determined that synthesized NPs with AAm presented a coating with similar characteristics to NPs with PAAm, suggesting that AAm underwent polymerization during the synthesis.

A Review on Synthesis, Characterization and Applications of Copper Nanoparticles Using Green Method

NANO ◽  
2017 ◽  
Vol 12 (04) ◽  
pp. 1750043 ◽  
Author(s):  
Muhammad Rafique ◽  
Ahson J. Shaikh ◽  
Reena Rasheed ◽  
Muhammad Bilal Tahir ◽  
Hafiz Faiq Bakhat ◽  
...  
Keyword(s):  
Copper Nanoparticles ◽  
Inorganic Material ◽  
Synthesis Method ◽  
Green Method ◽  
Environment Friendly ◽  
Modern Age ◽  
Wide Range ◽  
Material Sciences ◽  
Conventional Methods

To address accosts of this modern age, the synthesis of metal nanoparticles is more important than ever. Copper has been recognized as a nontoxic, safe inorganic material, cheaper antibacterial/antifungal agent, and has high potential in a wide range of biological, catalytic and sensors applications more particularly in the form of nanoparticles. This resulted in the development of numerous methods for the synthesis of copper nanoparticles. As conventional methods like chemical and physical methods have several limitations so there is need to an alternate method. Due to nontoxic and eco-friendly nature, it has recently been shifted toward green synthesis of copper nanoparticles over conventional methods. Additionally, characterization of the synthesized nanoparticles is essential for their use in various applications. This review gives an overview of environment friendly synthesis method of copper nanoparticles and their applications on the basis of their potential selectivity and preferences in a number of fields like material sciences and biomedicine.

Synthesis, characterization of active Sn(0), and its application in selective propargylation of aldehyde at room temperature in water

2019 ◽  
Vol 97 (1) ◽  
pp. 29-36 ◽  
Author(s):  
Paresh Nath Chatterjee ◽  
Dipankar Paul ◽  
Micky Lanster Sawkmie ◽  
Arun Kumar Sinha ◽  
Snehadrinarayan Khatua
Keyword(s):  
Carboxylic Acid ◽  
Functional Groups ◽  
Room Temperature ◽  
Chemical Reduction ◽  
Inert Atmosphere ◽  
Reducing Agent ◽  
Distilled Water ◽  
Propargyl Bromide ◽  
High Yields

Active Sn(0) particles are synthesized in high yields by the chemical reduction of the blue–black stannous oxide using freshly prepared sodium stannite solution as reducing agent at 40 °C and 60 °C. The Sn(0) particles are characterized using powder XRD, SEM, and DSC. The as-synthesized Sn(0) particles are applied as reagent for the regioselective synthesis of homopropargyl alcohols from propargyl bromide and aldehydes in distilled water at room temperature (in 50%–84% yields). No assistance of heat, microwave, ultrasound, organic co-solvent, co-reagent, or inert atmosphere is required for this reaction. The propargylation reaction is highly chemoselective towards aldehyde over other less electrophilic carbonyl functional groups such as ketone, amide, and carboxylic acid. Our in-house synthesized homopropargyl alcohols can be used to synthesize conjugated 1,3-diynes.

scholarly journals Nanofibrillated Cellulose and Copper Nanoparticles Embedded in Polyvinyl Alcohol Films for Antimicrobial Applications

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Tuhua Zhong ◽  
Gloria S. Oporto ◽  
Jacek Jaczynski ◽  
Changle Jiang
Keyword(s):  
Polyvinyl Alcohol ◽  
Copper Nanoparticles ◽  
Chemical Reduction ◽  
Antimicrobial Properties ◽  
Nanofibrillated Cellulose ◽  
Microbial Reduction ◽  
Nanocomposite Films ◽  
Transmission Electron ◽  
Average Size ◽  
Thermoplastic Resins

Our long-term goal is to develop a hybrid cellulose-copper nanoparticle material as a functional nanofiller to be incorporated in thermoplastic resins for efficiently improving their antimicrobial properties. In this study, copper nanoparticles were first synthesized through chemical reduction of cupric ions on TEMPO nanofibrillated cellulose (TNFC) template using borohydride as a copper reducing agent. The resulting hybrid material was embedded into a polyvinyl alcohol (PVA) matrix using a solvent casting method. The morphology of TNFC-copper nanoparticles was analyzed by transmission electron microscopy (TEM); spherical copper nanoparticles with average size of 9.2 ± 2.0 nm were determined. Thermogravimetric analysis and antimicrobial performance of the films were evaluated. Slight variations in thermal properties between the nanocomposite films and PVA resin were observed. Antimicrobial analysis demonstrated that one-week exposure of nonpathogenicEscherichia coliDH5αto the nanocomposite films results in up to 5-log microbial reduction.

scholarly journals Synthesis of Copper Nanoparticles Using Mixture of Allylamine and Polyallylamine

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Rubén Sierra-Ávila ◽  
Marissa Pérez-Alvarez ◽  
Gregorio Cadenas-Pliego ◽  
Víctor Comparán Padilla ◽  
Carlos Ávila-Orta ◽  
...  
Keyword(s):  
Copper Nanoparticles ◽  
Chemical Reduction ◽  
Sulfate Solution ◽  
Good Alternative ◽  
Production Costs ◽  
Average Particle ◽  
Copper Sulfate Solution ◽  
Stabilizing Agents ◽  
Equation Analysis ◽  
Wet Chemical

Copper nanoparticles (Cu-NPs) with sizes lower than 31 nm were prepared by wet chemical reduction using copper sulfate solution, hydrazine, and mixture of allylamine (AAm) and polyallylamine (PAAm) as stabilizing agents. The use of AAm/PAAm mixture leads to the formation of Cu and CuO nanoparticles. The resulting nanostructures were characterized by XRD, TGA, and TEM. The average particle diameters were determined by the Debye-Scherrer equation. Analysis by TGA, TEM, GS-MS, and1HNMR reveals that synthesized NPs with AAm presented a coating with similar characteristics to NPs with PAAm, suggesting that AAm underwent polymerization during the synthesis. The synthesis of NPs using AAm could be a good alternative to reduce production costs.

scholarly journals Free Radical Scavenging Activity of Copper Nanoparticles Synthesized from Dried Ginger

2020 ◽  
pp. 1-7
Author(s):  
R. Shruthi Devi ◽  
M. Jeevitha ◽  
S. Preetha ◽  
S. Rajeshkumar
Keyword(s):  
Copper Nanoparticles ◽  
Radical Scavenging Activity ◽  
Antioxidant Properties ◽  
Synthesis Method ◽  
Radical Scavenging ◽  
Antimicrobial Properties ◽  
Chemical Properties ◽  
Antioxidant Property ◽  
Synthesis Of Nanoparticles ◽  
Vis Spectroscopy

Nano science is considered to be an important area in research in which developing nontoxic, reliable and ecofriendly synthesis of nanoparticles by the green approach has a vital part. Nanoparticles that contain antimicrobial and antioxidant properties are considered to be a new trend for developing therapeutic agents that help in killing drug resistant pathogenic microorganisms. The present study is focused on discovering the antioxidant properties of copper nanoparticles synthesized from dried ginger. Dried ginger is a traditional medicine used widely and has shown to possess good antioxidant and antimicrobial properties. The phytochemical compounds of dried ginger can act as a reducing agent to synthesize copper nanoparticles. Copper nanoparticles were preferred for this study as it has unique physical and chemical properties. There are various methods used to synthesize nanoparticles and here in this study we have used the green synthesis method for synthesizing the copper nanoparticles. The copper nanoparticles were characterized by UV-vis spectroscopy and its antioxidant property was evaluated by DPPH assay.

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