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Eco-friendly synthesis of silver nanoparticles using green algae (Caulerpa serrulata): reaction optimization, catalytic and antibacterial activities
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Eco-friendly synthesis of silver nanoparticles using green algae (Caulerpa serrulata): reaction optimization, catalytic and antibacterial activities
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Journal Article
Eco-friendly synthesis of silver nanoparticles using green algae (Caulerpa serrulata): reaction optimization, catalytic and antibacterial activities
2017
Overview
Stable colloidal silver nanoparticles (AgNPs) were synthesized using
Caulerpa serrulata
(green marine algae) aqueous extract as an efficient reducing and stabilizing agent. This method is considered to be a sustainable alternate to the more complicated chemical procedures. To achieve the optimization synthesis of AgNPs, several effects such as extract concentration, contact time, pH values, and temperature were examined. The synthesized AgNPs were characterized by UV–Vis spectroscopy, FT-IR, XRD, and HR-TEM. The synthesized AgNPs showed an intense surface plasmon resonance band at 412 nm at the optimal conditions (20% (v/v) extract and 95 °C). TEM reveal that higher extract concentration and higher temperature leading to the formation of spherical AgNPs with an average particle size of 10 ± 2 nm. The synthesized AgNPs showed excellent catalytic reduction activity of Congo red (CR) dye from aqueous solutions. The degradation percentage of CR with AgNPs accelerated by increasing either NaBH
4
concentration or catalytic dosage. The AgNPs synthesized at higher temperature (e.g., 10Ag-95) exhibited the highest catalytic activity. The reaction kinetics was found to be pseudo first order with respect to the dye concentration. Moreover, the AgNPs displayed antibacterial activity at lower concentration against
Staphylococcus aureus
,
Pseudomonas aeruginosa
,
Shigella
sp.,
Salmonella typhi
, and
Escherichia coli
and may be a good alternative therapeutic approach. The outcomes of the current study confirmed that the synthesized AgNPs had an awesome guarantee for application in catalysis and wastewater treatment.
Publisher
Springer International Publishing,Springer Nature B.V
Subject
/ Anti-Bacterial Agents - metabolism
/ Anti-Bacterial Agents - pharmacology
/ Atmospheric Protection/Air Quality Control/Air Pollution
/ Caulerpa
/ Colloids
/ Dosage
/ Dyes
/ E coli
/ Earth and Environmental Science
/ Ecology
/ Escherichia coli - drug effects
/ Fourier transform infrared spectroscopy
/ Metal Nanoparticles - chemistry
/ Monitoring/Environmental Analysis
/ Shigella
/ Silver
/ Spectroscopy, Fourier Transform Infrared
/ transmission electron microscopy
