Silver Nanoparticle Lab Report

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INTRODUCTION Silver nanoparticles are nanoparticles of silver of between 1 nm and 100 nm in size. Some of the conventional methods of synthesis of silver nanoparticles are as follows:- 1) Reduction with Reducing Sugars Reducing sugars includes glucose, fructose, maltose, maltodextrin, etc. but not sucrose, and is the simplest method to reduce silver ions back to silver nanoparticles. And if the pH is over 7 the glucose molecule in the reducing sugar will open up its ring structure and attach to the surface of the nanoparticles, and thereby act as a weak stabilizing agent as well. 2) Citrate reduction An early, and very common, method for synthesizing silver nanoparticles is citrate reduction. Citrate reduction involves the reduction of silver…show more content…
Synergistic activity with common antibiotics such as penicillin G, ampicillin, erythromycin, clindamycin has also been observed. 2) Nanoenhanced textiles: Silver nanoparticles are embedded into the yarn of the cloth and remain active for the entire lifespan of the cloth. They prevent foul odour by killing bacteria and also aid in faster healing of small wounds and cuts. 3) Mesoporous aerogel: Silver nanoparticles infused on aerogel increases the number of active sites. The highest selectivity of oxidation of benzene to phenol has been observed with 1% Ag on the aerogel…show more content…
The clean algae are dried at room temperature in the shade for a week and powdered using a mortar and pestle. b) Preparation of seaweed extracts Dried powdered S. varians (5 g) was mixed with 100 ml distilled water in the Erlenmeyer flask. The mixture was then centrifuged at 4000 rpm for 10 min at 4 °C. Finally, the extract is collected and stored at 4 °C for further uses. c) Synthesis of silver nanoparticles Silver nitrate (AgNO3) of analytical grade (AR) is purchased. About 10 ml of the aqueous extract of S. varians was added into 90 ml of aqueous solution of 1 mM Silver nitrate AgNO3. Appearance of red color in solution indicated the formation of SNPs. The solution was then kept in dark for further analysis. d) UV–vis spectra analysis The reduction of pure silver ions was recorded by measuring the UV–vis spectra of the solution at room temperature with a Perkin Elmer Lambda 25 UV–vis spectrometer at the wave-length of 350–550 nm. e) Powder X-ray diffraction

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