scholarly journals Green synthesis methods of silver nanoparticles using lab waste-products

2020 ◽  
Author(s):  
Madisyn Peoples ◽  
Dr. Brian Yust
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Synthesis Methods ◽  
Waste Products

scholarly journals Hypericum perforatum L.-Mediated Green Synthesis of Silver Nanoparticles Exhibiting Antioxidant and Anticancer Activities

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 487 ◽  
Author(s):  
Abdalrahim Alahmad ◽  
Armin Feldhoff ◽  
Nadja C. Bigall ◽  
Pascal Rusch ◽  
Thomas Scheper ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Hypericum Perforatum ◽  
Nitrate Solution ◽  
A549 Cells ◽  
Metallic Silver ◽  
Synthesis Methods ◽  
Face Centered Cubic ◽  
Sem Images ◽  
Hypericum Perforatum L

This contribution focuses on the green synthesis of silver nanoparticles (AgNPs) with a size < 100 nm for potential medical applications by using silver nitrate solution and Hypericum Perforatum L. (St John’s wort) aqueous extracts. Various synthesis methods were used and compared with regard to their yield and quality of obtained AgNPs. Monodisperse spherical nanoparticles were generated with a size of approximately 20 to 50 nm as elucidated by different techniques (SEM, TEM). XRD measurements showed that metallic silver was formed and the particles possess a face-centered cubic structure (fcc). SEM images and FTIR spectra revealed that the AgNPs are covered by a protective surface layer composed of organic components originating from the plant extract. Ultraviolet-visible spectroscopy, dynamic light scattering, and zeta potential were also measured for biologically synthesized AgNPs. A potential mechanism of reducing silver ions to silver metal and protecting it in the nanoscale form has been proposed based on the obtained results. Moreover, the AgNPs prepared in the present study have been shown to exhibit a high antioxidant activity for 2, 2′-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) radical cation, and super oxide anion radical and 2,2-diphenyl-1-picrylhydrazyl. Synthesized AgNPs showed high cytotoxicity by inhibiting cell viability for Hela, Hep G2, and A549 cells.

scholarly journals GREEN SYNTHESIS, GREEN CHEMISTRY, AND ENVIRONMENTAL SUSTAINABILITY

2021 ◽  
Vol 7 (1) ◽  
pp. 18-27
Author(s):  
Mohammad Asif
Keyword(s):  
Green Chemistry ◽  
Green Synthesis ◽  
Environmental Sustainability ◽  
Industrial Applications ◽  
Vital Role ◽  
New Drugs ◽  
Synthetic Methods ◽  
Synthesis Methods ◽  
Waste Products ◽  
By Products

Purpose: The chemistry society has activated to expand new chemistry that is less destructive to the environment and human health. This approach has extensive interest and designated as green chemistry, environmentally friendly chemistry, clean chemistry, and atom economy. Methodology: There is advancement toward involved chemistry with the facts and do not prevent the properties of the target compound or the efficacy of particular solvents or reagents. The use of chemistry in a way that maximizes benefits while reducing adverse effects has come to be green chemistry. Main findings: Reduce the use and formation of harmful products or by-products. Presently maximum pollution to the environment is caused by some chemical industries. So, need to design and develop synthetic methods in such a way that the waste products are lowest and have no effect on the environment and their handy disposal. Applications of the work: Green chemistry plays a vital role in pharmaceuticals for developing new drugs which are less toxic, more effective with low side effects. The novelty of the work: The industries performing manufacturing using green synthesis methods to carrying out their productions have positive impacts on environmental sustainability. This review is looking ahead at longer-term challenges and prospects in research, industrial applications, and education.

scholarly journals A Review on Plants and Microorganisms Mediated Synthesis of Silver Nanoparticles, Role of Plants Metabolites and Applications

2022 ◽  
Vol 19 (2) ◽  
pp. 674
Author(s):  
Tijjani Mustapha ◽  
Norashiqin Misni ◽  
Nur Raihana Ithnin ◽  
Abdullahi Muhammad Daskum ◽  
Ngah Zasmy Unyah
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Food Packaging ◽  
Mosquito Control ◽  
Chemical Reactivity ◽  
Present Review ◽  
Synthesis Process ◽  
Synthesis Methods ◽  
Plant Metabolites

Silver nanoparticles are one of the most extensively studied nanomaterials due to their high stability and low chemical reactivity in comparison to other metals. They are commonly synthesized using toxic chemical reducing agents which reduce metal ions into uncharged nanoparticles. However, in the last few decades, several efforts were made to develop green synthesis methods to avoid the use of hazardous materials. The natural biomolecules found in plants such as proteins/enzymes, amino acids, polysaccharides, alkaloids, alcoholic compounds, and vitamins are responsible for the formation of silver nanoparticles. The green synthesis of silver nanoparticles is an eco-friendly approach, which should be further explored for the potential of different plants to synthesize nanoparticles. In the present review we describe the green synthesis of nanoparticles using plants, bacteria, and fungi and the role of plant metabolites in the synthesis process. Moreover, the present review also describes some applications of silver nanoparticles in different aspects such as antimicrobial, biomedicine, mosquito control, environment and wastewater treatment, agricultural, food safety, and food packaging.

Green Synthesis of Silver Nanoparticles from the Leaf Extract of Volkameriainermis

2017 ◽  
Vol 9 (08) ◽  
Author(s):  
Lavanya Krishnadhas ◽  
Santhi R. ◽  
Annapurani S.
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Plant Extract ◽  
Raw Materials ◽  
Synergetic Effect ◽  
Cost Effective ◽  
Synthesis Methods ◽  
Bioactive Constituents ◽  
Synthesis Of Nanoparticles ◽  
By Products

Nanoparticles are gaining interest in biomedical applications due to its importance such as anti-bacterial, anti-fungal and anti-cancer agents. Conventional methods for the synthesis of metal nanoparticles involves toxic reagents which produce harmful by-products and are hazardous to the environment. To overcome these limitations, green synthesis of nanoparticles was established. Eco-friendly methods using plant extracts are gaining popularity due to the abundance of raw materials and the production of non-toxic by-products threatening to the environment. Moreover, the nanoparticles synthesized from the plant extract are cost-effective. In addition, nanoparticles produced by green synthesis methods produces synergetic effect where both the nanoparticles as well as the natural bioactive constituents of the plant influence the biocidal properties. Different methods namely heating in water bath, microwave oven and exposure to bright sunlight were adopted for the synthesis of silver nanoparticles. Plant extract based synthesis of silver nanoparticles was eco-friendly and shows an alternative promise in bio-medical applications and it undertakes the negative effects of synthetic drugs.

Evaluation of Cytotoxic Effect of Silver Nanoparticles (AgNP) Synthesized from Phlebodium aureum (L.) J. Smith Extracts

2020 ◽  
Vol 21 ◽  
Author(s):  
Johnson Marimuthu ◽  
Shibila Thangaiah ◽  
Amutha Santhanam ◽  
Vidyarani George
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Large Scale ◽  
Color Change ◽  
Nanoparticle Synthesis ◽  
Xrd Analysis ◽  
Nano Particles ◽  
Synthesis Methods ◽  
Aqueous Extracts ◽  
Ft Ir

Background:: Chemical synthesis methods are adverse in the medicinal field as they produce toxic in the surface whereas green synthesis provide advancement as well as they are cost effective, environment friendly, can be easily scaled up for large scale synthesis. Silver and silver nanoparticles have an important application in the medical industry such as tropical ointments which are used to prevent infection against burn and open wounds. There is no report on the green synthesis from Phlebodium aureum (L.) J. Smith. Objective:: The present study was aimed to synthesize silver nano-particles using Phlebodium aureum (L.) J. Smith extracts by green approach and to screen their cytotoxicity. Methods:: The synthesized AgNPs of P. aureum were characterized by FT-IR, SEM and XRD. The cytotoxicity of the aqueous extracts and AgNPs of P. aureum were determined. Results:: The silver nanoparticle synthesis was confirmed by color change from yellow to dark brown and absorption peak at 460 nm. FT-IR analysis confirmed the capping by proteins and other metabolites. XRD analysis confirmed the existence of silver nanaoparticles with a peak at 46.253°. The dose dependent cytotoxicity was observed in the aqueous and silver nanoparticles of P.aureum. Conclusion:: The present study gave a simple and cheap route to synthesize the AgNPs using aqueous extracts of P. aureum. The studied extracts of P. aureum can be considered as a promising candidate for a plant-derived anti-tumour compound.

Two Green Synthesis Methods to Prepared Nanoparticles of Ag: Two Sizes and Shapes via Using Extract of M. dubia Leaves

2020 ◽  
Vol 17 (7) ◽  
pp. 2882-2889
Author(s):  
Mustafa Mudhafar ◽  
Ismail Zainol ◽  
C. N. Aiza Jaafar ◽  
H. A. Alsailawi ◽  
Alhussein Arkan Majhool
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Synthesis Methods ◽  
Single Element ◽  
Fish Scales ◽  
Visible Spectroscopy ◽  
Ag Nps ◽  
X Ray ◽  
Different Shapes ◽  
Average Size

The effect of the synthesis technique on the shape and size of Ag-NPs has been reported. Ag nanoparticles has been produced by using two techniques, green synthesis and microwave-assisted green synthesis methods (MSGS), respectively. The current research was included to use a stabilizer and reducing agents from natural sources to get the non-toxic and environmentally friendly product, via using Melia dubia (neem) (M. dubia) and fish scales collagen (FsCol). The nanoparticles of Ag was portrayed by using Scanning electron microscope (SEM), Ultraviolet-visible spectroscopy (UV-vis), Energy-dispersive X-ray spectroscopy (EDX), Fourier-transform infrared spectroscopy (FTIR), Dynamic Light Scattering (DLS) and X-ray Powder Diffraction (XRD). Two different absorbance peaks were noticed in UV-vis and located at 454 nm silver nanoparticles-1 (AgNPs-1) and 446 nm silver nanoparticles-2 (AgNPs-2). SEM was shown two different shapes rod (AgNPs-1) and spherical (AgNPs-2 shapes. EDX confirmed the presence of Ag as a single element at 3 KeV. FTIR was shown fictional groups that were surrounded by silver nanoparticles C2H2 C=O, N-H groups was an indication. XRD was shown thus that the AgNPs formed in this modern prepared are crystalline with two different sizes 120.20 and 84.30 nm, corresponding to AgNPs-1 and AgNPs-2. The Z-average in DLS for AgNPs-1 has been shown average size at 437.8 nm while AgNPs-2 was shown 121 nm in its size.

Silver nanoparticles: An integrated view of green synthesis methods, transformation in the environment, and toxicity

2019 ◽  
Vol 171 ◽  
pp. 691-700 ◽  
Author(s):  
Tiago Alves Jorge de Souza ◽  
Lilian Rodrigues Rosa Souza ◽  
Leonardo Pereira Franchi
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Synthesis Methods

scholarly journals Green synthesis of silver nanoparticles using Calotropis gigantea and its characterization using UV-Vis Spectroscopy

2022 ◽  
Vol 951 (1) ◽  
pp. 012090
Author(s):  
P Kemala ◽  
R Idroes ◽  
K Khairan ◽  
T E Tallei ◽  
M Ramli ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Synthesis Method ◽  
Colour Change ◽  
Synthesis Methods ◽  
Phytochemical Analysis ◽  
Geothermal Area ◽  
Calotropis Gigantea ◽  
Yellow Solution ◽  
Vis Spectroscopy

Abstract The use of Calotropis gigantea from Ie Seu-Um, Aceh Besar geothermal area for silver nanoparticles (AgNPs) synthesized has been reported. The process of synthesis AgNPs can be carried out with chemical methods, physical methods, and green synthesis methods, but in this study, the process is focused on the green synthesis method using C. gigantea flowers and leaves extract from Ie Seu-Um geothermal area, Aceh Besar. Phytochemical analysis showed that C. gigantea leaves contain alkaloids, steroids, tannins, phenolics, and saponins, while the flowers of C. gigantea contain alkaloids, terpenoids, steroids, flavonoids, tannins, phenolics, and saponins. The reaction of the AgNPs formation was observed by colour change formed. AgNPs-C. gigantea flower extract dan AgNPs-C. gigantea leaves extract showed the reddish-brown and brownish-yellow solution respectively after 48 h incubation in dark condition at room temperature. The result of the reaction characterized using UV-Vis Spectrophotometry showed that the phenomenon of Surface plasmone resonance (SPR) occurs in the mixture of nanoparticles formed. The concentration of AgNO3 as a reagent affected the SPR phenomenon. The result showed that particles formed are the same size and shape.

scholarly journals Green Synthesis of Gold and Silver Nanoparticles from Plant Extracts and Their Possible Applications as Antimicrobial Agents in the Agricultural Area

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1763 ◽  
Author(s):  
Luis Castillo-Henríquez ◽  
Karla Alfaro-Aguilar ◽  
Jeisson Ugalde-Álvarez ◽  
Laura Vega-Fernández ◽  
Gabriela Montes de Oca-Vásquez ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Green Chemistry ◽  
Green Synthesis ◽  
Plant Extracts ◽  
Fungal Pathogens ◽  
Antimicrobial Agents ◽  
Biological Diversity ◽  
Synthesis Methods ◽  
Agricultural Field ◽  
Gold And Silver Nanoparticles

Currently, metal nanoparticles have varied uses for different medical, pharmaceutical, and agricultural applications. Nanobiotechnology, combined with green chemistry, has great potential for the development of novel and necessary products that benefit human health, environment, and industries. Green chemistry has an important role due to its contribution to unconventional synthesis methods of gold and silver nanoparticles from plant extracts, which have exhibited antimicrobial potential, among other outstanding properties. Biodiversity-rich countries need to collect and convert knowledge from biological resources into processes, compounds, methods, and tools, which need to be achieved along with sustainable use and exploitation of biological diversity. Therefore, this paper describes the relevant reported green synthesis of gold and silver nanoparticles from plant extracts and their capacity as antimicrobial agents within the agricultural field for fighting against bacterial and fungal pathogens that can cause plant, waterborne, and foodborne diseases. Moreover, this work makes a brief review of nanoparticles’ contribution to water treatment and the development of “environmentally-friendly” nanofertilizers, nanopesticides, and nanoherbicides, as well as presenting the harmful effects of nanoparticles accumulation in plants and soils.

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