Optimization of precursor concentration and timing of stirring in the formation of silver nanoparticles with and without polyvinyl alcohol (PVA)
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Abstract The biosynthesis of silver nanoparticles using plants as reducing agents has been reported. In this study used plant extracts Myrmecodia pendans which function as reducing agents and AgNO3 as metal precursors. Silver nanoparticles were successfully synthesized by using plant extracts of Myrmecodia pendans by doing them on variations in concentration and stirring time. In this case a variation of 0.5 mM is used; 1mM; 1.5 mM; 2 mM; and 2.5 mM and the time variation used was 120 minutes and 150 minutes. Analysis using UV-Vis spectrophotometer to determine silver nanoparticles formed in a wavelength range of 400-500 nm. From the results of the study, it was obtained that the concentration of 1 mM with 120 minutes stirring time was the best concentration and the time of formation of silver nanoparticles without stabilizer with absorbance of 2.125 at a wavelength of 408 nm and at a concentration of 2.5 mM with 120 minutes stirring time was the best concentration and stirring time formation of silver nanoparticles with a stabilizer at a wavelength of 413.5 nm with absorbance of 2,636.Keywords:
Absorbance
Polyvinyl Alcohol
Silver nanoparticle
Stabilizer (aeronautics)
Reducing agent
RETURN TO ISSUEPREVAdvertisementNEXT"Hydroxylamine sulfate has already been used as a reducing agent, antioxidant, stabilizer and inhibitor and in synthesis. Yet its potential is still virtually untapped."Cite this: Chem. Eng. News 1958, 36, 42, 78–79Publication Date (Print):October 20, 1958Publication History Published online6 November 2010Published inissue 20 October 1958https://doi.org/10.1021/cen-v036n042.p078Copyright © 1958 AMERICAN CHEMICAL SOCIETYArticle Views63Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (205 KB) SUBJECTS:Anions,Antioxidants,Inhibitors Get e-Alerts
Hydroxylamine
Stabilizer (aeronautics)
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Absorbance
Silver nanoparticle
Silver chloride
Spectrophotometry
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Polyvinyl Alcohol
Silver nanoparticle
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Stabilizer (aeronautics)
Reducing agent
Nanochemistry
Degradation
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Abstract The biosynthesis of silver nanoparticles using plants as reducing agents has been reported. In this study used plant extracts Myrmecodia pendans which function as reducing agents and AgNO3 as metal precursors. Silver nanoparticles were successfully synthesized by using plant extracts of Myrmecodia pendans by doing them on variations in concentration and stirring time. In this case a variation of 0.5 mM is used; 1mM; 1.5 mM; 2 mM; and 2.5 mM and the time variation used was 120 minutes and 150 minutes. Analysis using UV-Vis spectrophotometer to determine silver nanoparticles formed in a wavelength range of 400-500 nm. From the results of the study, it was obtained that the concentration of 1 mM with 120 minutes stirring time was the best concentration and the time of formation of silver nanoparticles without stabilizer with absorbance of 2.125 at a wavelength of 408 nm and at a concentration of 2.5 mM with 120 minutes stirring time was the best concentration and stirring time formation of silver nanoparticles with a stabilizer at a wavelength of 413.5 nm with absorbance of 2,636.
Absorbance
Polyvinyl Alcohol
Silver nanoparticle
Stabilizer (aeronautics)
Reducing agent
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Synthesis of silver nanoparticles was carried out using environmentally Beluntas (Pluchea Indica L.) leaf extract to minimize the use of harmful chemicals. Synthesis was carried out with the ratio of AgNO3 solution and the beluntas leaf extract 90 mL : 1 mL. The process of forming silver nanoparticles was studied and monitored by observing the absorption spectrum using UV-Vis spectrophotometer. The observations showed the silver nanoparticles that was formed had SPR (Surface Plasmon Resonance) absorbance peak values at the wavelength of about 445,5 nm with an absorbance value of 3,437. The absorbance value increased with the increasing reaction time from 1 hour to 168 hours. From the result of testing using PSA, the average size of silver nanoparticles was 109.1 nm which is dispersed between 1,8 nm – 127,3 nm.
Absorbance
Silver nanoparticle
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There is a worldwide interest in silver nanoparticles (AgNPs) synthesize by various chemical reactions for use in applications. Silver nanoparticles have gained significant interest due to their unique optical, antimicrobial, electrical, physical properties and their possible application. However, it is necessary to develop environmental friendly methods for their syntheses. To avoid chemically toxicity, biosynthesis of metal silver nanoparticles is proposed as a cost-effective and environmental friendly alternative. This study aimed to find out whether Alagaw plant can potentially act as a reducing agent for the biosynthesis of silver nanoparticles and whether the concentration of the leaf extract can affect the absorbance spectrum, size and shape of the synthesized silver nanoparticles. The synthesized silver nanoparticles were characterized using the UV-vis spectroscopy for its absorbance spectrum and Transmission Electron Microscope Analysis for its morphology and size. The experimental method of research was used using three treatments and replicates of the different concentrations of Alagaw leaf extract: Treatment A (0.2 g/mL), Treatment B (0.4 g/mL) and Treatment C (0.6 g/mL) with 10 minutes and 60 minutes interval of observation under UV-vis spectrophotometer. Based on the findings of the study, Alagaw plant can potentially act as a good reducing agent for the biosynthesis of silver nanoparticles. The results recorded from UV-vis spectrophotometer support the biosynthesis and characterization of silver nanoparticles that as the concentration of the leaf extract increases it significantly affect the wavelength peaks and absorbance peaks of the synthesized silver nanoparticles. Using the high-resolution Transmission Electron Microscopy, the size of silver nanoparticles measured 50 nm – 100 nm having near-spherical in shape.
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Silver nanoparticles (AgNPs) are one of the most vital and captivating nanomaterials between numerous metallic nanoparticles that are involved in various applications. In this paper, we briefly discuss the synthesis of AgNPs properties and application for the nanoparticles. The present work shows that the reduction of silver ions from AgNO3 to Ag occurs due reducing agent. The synthesized silver particles have been characterized by UV – Visible, TEM and XRD techniques.
Silver nanoparticle
Reducing agent
Nanomaterials
Silver Nano
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Alternating and semicontinuous chemical reduction method for high production of silver nanoparticles
Synthesis of silver nanoparticles (AgNPs) was carried out in aqueous solutions. Silver nitrate was used as precursor, carboxymethyl cellulose (CMC) as stabilising agent, and sodium borohydride as reducing agent. The reaction was semicontinuous by feeding both the precursor and reducing agent into the stabilising agent aqueous solution in an alternated fashion. Weight ratios of 1:1 AgNO 3 :CMC were used in the reduction reactions. AgNPs were characterised by UV–vis spectroscopy, transmission electronic microscopy (TEM), and X‐ray diffraction. The formation of AgNPs was confirmed by the presence of an absorption peak about 400 nm using UV–vis spectrophotometry. Spheroidal nanoparticles with an average diameter between 5 and 90 nm were observed by TEM. High productivity of AgNPs was obtained at lower reaction times and at low temperature compared with others previously reported in the literature.
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Chemical reduction
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