scholarly journals LARGE SCALE, GREEN SYNTHESIS OF A GENERATION-1 MELAMINE (TRIAZINE) DENDRIMER

2009 ◽  
Vol 86 ◽  
pp. 151 ◽  
Keyword(s):  
Green Synthesis ◽  
Large Scale

CHARACTERIZATION, ANTIMICROBIAL, AND METABOLIC ACTIVITY OF GREEN AND CHEMICALLY SYNTHESIZED ZINC OXIDE NANOPARTICLES

2019 ◽  
pp. 11-17
Author(s):  
SUMATHI S ◽  
BANUPRIYA SJS ◽  
AKHILA V ◽  
PADMA PR
Keyword(s):  
Zinc Oxide ◽  
Chemical Synthesis ◽  
Green Synthesis ◽  
Zinc Oxide Nanoparticles ◽  
Large Scale ◽  
Cost Effective ◽  
Oxide Nanoparticles ◽  
Antibiofilm Activity ◽  
Bacterial Strains ◽  
Hemolysis Assay

Objectives: The aim of the present study is a synthesis of zinc oxide nanoparticles (ZnONPs) by green and chemical method. The nanoparticles were tested for their antimicrobial, antibiofilm activity, biocompatibility, and hemolysis activity. Methods: We have synthesized ZnONPs both by green and chemical synthesis using the coprecipitation method. To understand the functional group, absorbance, crystalline nature, size, and shape of the synthesized particles, Fourier transform infrared (FTIR), ultraviolet–visible spectroscopy, X-ray diffraction, and scanning electron microscopy were done. Antibacterial activity was carried out using different bacterial strains. The cytotoxicity of synthesized nanoparticles was checked using MTT assay with Klebsiella pneumoniae. Antibiofilm activities of both synthesized nanoparticles were done using Staphylococcus aureus and to assess the toxicity of nanoparticles at the cellular level, hemolysis assay was performed. Results: The yield of nanoparticles in green synthesis was much higher when compared to chemical synthesis. Spectral results showed that the synthesized nanoparticles were ZnONPs. Antibacterial, antibiofilm, and hemolysis assay showed that green nanoparticles were more potent than chemical nanoparticles. Conclusion: Hence, green synthesis provides an advantage over chemical synthesis as it is cost effective, environmentally friendly, and easily scaled up for large-scale synthesis.

Completely green synthesis of silver nanoparticle decorated MWCNT and its antibacterial and catalytic properties

2016 ◽  
Vol 88 (1-2) ◽  
pp. 71-81 ◽  
Author(s):  
Sneha Mohan ◽  
Oluwatobi S. Oluwafemi ◽  
Sandile P. Songca ◽  
Didier Rouxel ◽  
Patrice Miska ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Green Synthesis ◽  
Silver Nanoparticle ◽  
Large Scale ◽  
Hybrid Nanocomposites ◽  
Antibacterial Efficacy ◽  
Hybrid Nanocomposite ◽  
Ag Nps ◽  
Simple Method ◽  
G Ratio

AbstractWe herein report a simple large scale green synthesis route for the synthesis of silver nanoparticle (Ag-NP) multi walled carbon nanotubes (MWCNTs) hybrid nanocomposite (Ag-MWCNTs). The as-synthesized hybrid nanocomposite were characterized using UV-Vis absorption spectroscopy, Fourier transform infra-red spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction analysis (XRD) and high resolution transmission electron microscopy (HR-TEM). Raman spectroscopy analysis showed an increase in the D/G ratio of Ag-MWCNTs hybrid nanocomposites when compare with that of functionalized MWCNTs (F-MWCNTs) attributed to the presence of Ag-NPs on the surface of the F-MWCNTs. The as-synthesized Ag-MWCNTs nanocomposites showed strong antibacterial efficacy against Escherichia coli compared to the Ag-NPs and MWCNTs. The catalytic potential of the Ag-MWCNTs hybrid nanocomposite was investigated for the first time by studying the reduction of 4-nitrophenol to 4-aminophenol in the presence of sodium borohydride at 299 K at various reaction times. The reaction follows first order kinetics with a rate constant of 5.18×10−1 s−1. It is believed that, the large scale synthesis of such hybrid nanocomposites via simple method using non-toxic reagent will not only enhance its antibacterial efficacy, durability and biocompatibility, it will also minimize its biotoxcity and environmental impacts.

Large Scale, Green Synthesis of a Generation-1 Melamine (Triazine) Dendrimer

2009 ◽  
pp. 151-160 ◽  
Author(s):  
Abdellatif Chouai ◽  
Vincent J. Venditto ◽  
Eric E. Simanek
Keyword(s):  
Green Synthesis ◽  
Large Scale

scholarly journals Green Synthesis of Highly Concentrated and Stable Colloidal Dispersion of Core-Shell Silver Nanoparticles (AgNPs-Shell) and their Antimicrobial and Ultra-high Catalytic Properties

2021 ◽  
Author(s):  
Azam Ali ◽  
Mehrukh Zehravi ◽  
Muhammad Humble Khalid Treen ◽  
Jiri Militky ◽  
Fiaz Hussain ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Tannic Acid ◽  
Large Scale ◽  
Catalytic Properties ◽  
Average Particle Size ◽  
Colloidal Dispersion ◽  
Alkaline Condition ◽  
Core Shell ◽  
Average Particle ◽  
One Pot

The versatile one-pot green synthesis of a highly concentrated and stable colloidal dispersion of AgNPs was carried out using the self-assembled tannic acid without using any other hazardous chemicals. Tannic acid (Plant-based polyphenol) was used as a reducing and stabilizing agent for silver nitrate in a mild alkaline condition. The synthesized AgNPs were characterized for their concentration, capping, size distribution, and shape. The experimental results confirmed the successful synthesis of nearly spherical and highly concentrated (2281 ppm) AgNPs, capped with poly-tannic acid (AgNPs-PTA). The average particle size of AgNPs-PTA was found 9.90 ± 1.60 nm. The colloidal dispersion of synthesized nanoparticles was observed stable for more than 15 months in the ambient environment (25 oC, 65 % relative humidity). The synthesized AgNPs-PTA showed an effective antimicrobial activity against Staphylococcus Aureus Escherichia coli. Ag-PTA also exhibited enhanced catalytic properties. It reduces 4-nitrophenol into 4-aminophenol in the presence of NaBH4 with a normalized rate constant (Knor = K/m) of 615.04 mL·s-1·mg-1. Furthermore, AgNPs-PTA were stable for more than 15 months under ambient conditions. The unique core-shell structure and ease of synthesis render the synthesized nanoparticles superior to others, with potential for large-scale applications, especially in the field of catalysis and biomedical.

Precision control of the large-scale green synthesis of biodegradable gold nanodandelions as potential radiotheranostics

2019 ◽  
Vol 7 (11) ◽  
pp. 4720-4729
Author(s):  
Yao-Chen Chuang ◽  
Yu Hsia ◽  
Chia-Hui Chu ◽  
Li-Jie Lin ◽  
Maharajan Sivasubramanian ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Surface Area ◽  
Large Scale ◽  
High Surface ◽  
High Surface Area ◽  
Precision Control ◽  
New Type

Herein, we report a new type of biodegradable, high surface-area gold nanodandelions (GNDs) as potential radiotheranostics.

Green-assisted tool for nanogold synthesis based on alginate as a biological macromolecule

RSC Advances ◽  
2016 ◽  
Vol 6 (78) ◽  
pp. 73974-73985 ◽  
Author(s):  
Hanan B. Ahmed ◽  
A. M. Abdel-Mohsen ◽  
Hossam E. Emam
Keyword(s):  
Green Synthesis ◽  
Biomedical Applications ◽  
Large Scale ◽  
Biological Macromolecule

Large-scale biomedical applications of nanogold reflect the challenge faced by recent researches in the investigation of green synthesis methodologies, which are mostly complicated and/or expensive processes.

scholarly journals GREEN SYNTHESIS OF SILVER NANOPARTICLES USING SAGO (METROXYLON SAGU) VIA AUTOCLAVING METHOD

2018 ◽  
Vol 19 (1) ◽  
pp. 178-184
Author(s):  
Aliyah Jamaludin ◽  
Che Ku Mohammad Faizal
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Silver Nitrate ◽  
Large Scale ◽  
Reducing Agent ◽  
Average Particle ◽  
Particle Sizes ◽  
Green Method ◽  
Metroxylon Sagu

Sago (metroxylon sagu) is a polysaccharide bio resource, which is biodegradable and low in toxicity that can be found in large scale in Mukah, Sarawak.  A simple green method of synthesizing silver nanoparticles (AgNPs) has been developed using sago dissolved in water as the reducing agent. The mixture of dissolved sago and silver nitrate (AgNO3) were autoclaved at 121 °C for 20 minutes. The size, morphology and structures of the AgNPs formed in the sago solution were investigated through UV-Vis spectrophotemeter, XRD and FESEM analysis. The synthesized AgNPs were spherical in shape and well distributed with average particle sizes of 19.3 ± 2.7 nm.ABSTRAK: Sago (Pokok Rumbia) adalah sumber bio polisakarida yang bioterurai dan rendah ketoksikan yang boleh didapati dalam skala yang besar di Mukah, Sarawak. Satu kaedah hijau yang mudah untuk mensintesis nanopartikel perak telah dihasilkan dengan menggunakan sagu yang larut dalam air sebagai ejen penurunan. Campuran sagu yang dilarutkan dan perak nitrat (AgNO3) telah autoklaf pada suhu 121°C selama 20 minit. Saiz, morfologi dan struktur nanopartikel perak yang terhasil di dalam larutan sago telah disiasat melalui analisis spektrofotometer UV-Vis, XRD dan FESEM. Nanopartikel perak yang dihasilkan adalah berbentuk bulat dengan purata saiz partikel 19.3 ± 2.7 nm.

Large Scale Green Synthesis of 1,2,4-Butanetriol

2007 ◽  
Author(s):  
Christopher Saffron ◽  
John W. Frost
Keyword(s):  
Green Synthesis ◽  
Large Scale
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