Short Review: The Effect of Reaction Conditions on Plant-Mediated Synthesis of Silver Nanoparticles

2018 ◽  
Vol 917 ◽  
pp. 145-151 ◽  
Author(s):  
Nur Syazana Jalani ◽  
Sharifah Zati-Hanani ◽  
Yi Peng Teoh ◽  
Rozaini Abdullah
Keyword(s):  
Silver Nanoparticles ◽  
Bioactive Compounds ◽  
Short Review ◽  
Natural Source ◽  
Hazardous Chemicals ◽  
Reaction Conditions ◽  
Physical Methods ◽  
Stabilizing Agents ◽  
Environmental Friendly ◽  
Source Plant

Recently, interest in plant-mediated synthesis of the silver nanoparticles (AgNPs) is growing among researchers and till now the potential of different plants is still further explored to synthesize nanoparticles. Conventionally, AgNPs are synthesized using chemical and physical methods. However, these methods involve use of toxic and hazardous chemicals which are harmful to health and environment. Therefore, plant-mediated synthesis has been used as environmental friendly alternative to overcome the limitation of conventional methods. The bioactive compounds in plant acts as natural reducing and stabilizing agents which help to increase the rate of synthesis and stabilization of synthesized nanoparticles. Besides, the nanoparticles synthesized using plants are reported to be more stable and the rate of synthesis is much faster compared to other methods. This review focuses on the biosynthesis of AgNPs using plant as natural source plant and the effect of reaction conditions are summarised and discussed.

scholarly journals Green Synthesis of Hydroxyethyl Cellulose-Stabilized Silver Nanoparticles

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
M. A. El-Sheikh ◽  
S. M. El-Rafie ◽  
E. S. Abdel-Halim ◽  
M. H. El-Rafie
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Colloidal Solution ◽  
Hydroxyethyl Cellulose ◽  
Synthesis Process ◽  
Reaction Conditions ◽  
Oh Groups ◽  
Stabilizing Agents ◽  
Transmission Electron ◽  
Optimum Reaction

Green synthesis aims to minimize the use of unsafe reactants and maximize the efficiency of synthesis process. These could be achieved by using environmentally compassionate polymers and nontoxic chemicals. Hydroxyethyl cellulose (HEC), an ecofriendly polymer, was used as both reducing and stabilizing agents in the synthesis of stable silver nanoparticles, while silver nitrate was used as a precursor and water as a solvent. The formation of silver nanoparticles was assessed by monitoring UV-vis spectra of the silver colloidal solution. The size of the nanoparticles was measured using transmission electron microscope (TEM). Reaction kinetics was followed by measuring the absorbance of silver colloidal solution at different time intervals. Optimum reaction conditions revealed that the highest absorbance was obtained using HEC : AgNO3 of 1.5 : 0.17 (g/100 cm3) at 70°C for 120 min at pH 12. The Ag0 nanoparticles colloidal solution so obtained (1000 ppm) were found stable in aqueous solution over a period of six months at room temperature (°C). The sizes of these nanoparticles were found in the range of 11–60 nm after six months of storing. FTIR spectra confirmed the interaction of both the aldehyde and OH groups in the synthesis and stabilization of silver nanoparticles.

Glycine max (L.) Merr., Vigna radiata L. and Medicago sativa L. sprouts: A natural source of bioactive compounds

2013 ◽  
Vol 50 (1) ◽  
pp. 167-175 ◽  
Author(s):  
Luís R. Silva ◽  
Maria J. Pereira ◽  
Jessica Azevedo ◽  
Rui F. Gonçalves ◽  
Patrícia Valentão ◽  
...  
Keyword(s):  
Glycine Max ◽  
Medicago Sativa ◽  
Bioactive Compounds ◽  
Vigna Radiata ◽  
Natural Source ◽  
Glycine Max L ◽  
Medicago Sativa L

A short review on encapsulation of bioactive compounds using different drying techniques

2021 ◽  
Vol 42 ◽  
pp. 288-296
Author(s):  
S.K. Abdul Mudalip ◽  
M.N. Khatiman ◽  
N.A. Hashim ◽  
R. Che Man ◽  
Z.I.M. Arshad
Keyword(s):  
Bioactive Compounds ◽  
Short Review ◽  
Drying Techniques

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.

scholarly journals Gundelia tournefortii L.: a natural source for the green synthesis of silver nanoparticles

2017 ◽  
Vol 11 (7) ◽  
pp. 815-820 ◽  
Author(s):  
Ali Reza Allafchian ◽  
Hamid Reza Farhang ◽  
Sayed Amir Hossein Jalali ◽  
Mohammad Reza Vahabi
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Natural Source

scholarly journals Microwave-Assisted Green Synthesis of Silver Nanoparticles Using Juglans regia Leaf Extract and Evaluation of Their Physico-Chemical and Antibacterial Properties

Antibiotics ◽  
2018 ◽  
Vol 7 (3) ◽  
pp. 68 ◽  
Author(s):  
Mahsa Eshghi ◽  
Hamideh Vaghari ◽  
Yahya Najian ◽  
Mohammad Najian ◽  
Hoda Jafarizadeh-Malmiri ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Leaf Extract ◽  
Juglans Regia ◽  
Antibacterial Properties ◽  
Infrared Analysis ◽  
Ag Nps ◽  
Stabilizing Agents ◽  
Agno3 Solution ◽  
Transmission Electron ◽  
Vis Spectroscopy

Silver nanoparticles (Ag NPs) were synthesized using Juglans regia (J. regia) leaf extract, as both reducing and stabilizing agents through microwave irradiation method. The effects of a 1% (w/v) amount of leaf extract (0.1–0.9 mL) and an amount of 1 mM AgNO3 solution (15–25 mL) on the broad emission peak (λmax) and concentration of the synthesized Ag NPs solution were investigated using response surface methodology (RSM). Fourier transform infrared analysis indicated the main functional groups existing in the J. regia leaf extract. Dynamic light scattering, UV-Vis spectroscopy and transmission electron microscopy were used to characterize the synthesized Ag NPs. Fabricated Ag NPs with the mean particle size and polydispersity index and maximum concentration and zeta potential of 168 nm, 0.419, 135.16 ppm and −15.6 mV, respectively, were obtained using 0.1 mL of J. regia leaf extract and 15 mL of AgNO3. The antibacterial activity of the fabricated Ag NPs was assessed against both Gram negative (Escherichia coli) and positive (Staphylococcus aureus) bacteria and was found to possess high bactericidal effects.

scholarly journals Eco-friendly microwave-enhanced green synthesis of silver nanoparticles using Aloe vera leaf extract and their physico-chemical and antibacterial studies

2018 ◽  
Vol 7 (3) ◽  
pp. 231-240 ◽  
Author(s):  
Omid Ahmadi ◽  
Hoda Jafarizadeh-Malmiri ◽  
Naeimeh Jodeiri
Keyword(s):  
Particle Size ◽  
Silver Nanoparticles ◽  
Exposure Time ◽  
Leaf Extract ◽  
Aloe Vera ◽  
Synthesis Conditions ◽  
Stabilizing Agents ◽  
Microwave Exposure ◽  
Mean Particle Size ◽  
Vis Spectroscopy

Abstract Silver nanoparticles (AgNPs) were synthesized using Aloe vera leaf extract as both reducing and stabilizing agents via microwave irradiation method. The effects of the microwave exposure time and the amount of AgNO3 solution on the mean particle size and concentration of the synthesized AgNPs solution were investigated using response surface methodology. The synthesized AgNPs were characterized by transmission electron microscopy, UV-Vis spectroscopy, and dynamic light scattering. Well-dispersed and spherically fabricated AgNPs with mean particle size (46 nm) and maximum concentration (64 ppm) and zeta potential (+15.5 mV), were obtained at optimal synthesis conditions, using 9 ml of AgNO3 (1 mm) and 0.1 ml of Aloe vera extract during microwave exposure time of 360 s. The antibacterial activity of the synthesized AgNPs was tested using Escherichia coli and Staphylococcus aureus bacteria and the obtained results indicated their significant inhibitory effects against these two Gram-negative and Gram-positive bacteria.

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