Silver nanoparticle synthesis by using chemical synthesis method and green synthesis method k.pptx

Synthesis of silver nanoparticles using chemical method and green synthesis method

1. Silver Nanoparticle

2. Contents: Introduction Aim and Objective Material and Methodology Characterization Conclusion

3. Introduction : A nanoparticle  is a particle of matter 1 to 100 nm in diameter.  Undetectable by the human eye, nanoparticles can exhibit significantly different physical and chemical properties to their larger material counterparts. Being more subject to the Brownian motion, they usually do not sediment, like colloidal particles that conversely are usually understood to range from 1 to 1000 nm. Being much smaller than the wavelengths of visible light (400-700 nm), nanoparticles cannot be seen with ordinary optical microscopes, requiring the use of electron microscopes or microscopes with laser.  For the same reason, dispersions of nanoparticles in transparent media can be transparent, whereas suspensions of larger particles usually scatter some or all visible light incident on them. Nanoparticles also easily pass through common filters, such as common ceramic candles, so that separation from liquids requires special Nano filtration techniques.

4. Characteristics  of Nanoparticles : Difficult to produce by breakdown process.  Small size effect (quantum size effect)   Electronic states quite different from those of bulk.  Large surface to volume ratio. Metal nanoparticles have unique light scattering properties and exhibit plasmon resonance (e.g., lower melting points, higher specific surface areas, specific optical properties mechanical strengths, and specific magnetizations).  Semiconductor nanoparticles may exhibit confined energy states in their electronic band Structure.  Can have unique chemical and physical properties.  Same size scale as many biological structures.

5. Classification of Nanoparticles

6. Silver Nanoparticles Silver nanoparticles (AgNPs) are very popular and have many uses in industry and biomedicine due to their physical and chemical properties in addition to their biological properties, which encompass a range of activities such as antiviral, antifungal, anti- inflammatory, and anticancer activities.  Silver is a nontoxic, safe inorganic antibacterial agent that is capable of killing about 650 types of disease-causing microorganisms Surface chemistry, size, size distribution, shape, particle morphology, particle composition, coating agglomeration, and dissolution rate are factors that affect the effectiveness of AgNPs inside biological system., primarily used for unconventional and enhanced biomedical applications in such areas as drug delivery, wound dressings, tissue scaffolding and protective coating applications. Silver nanoparticles have emerged as a great field of interest for researchers because of their unique activity against a large range of microorganisms and due to resistance against commonly used antibiotics.  It is also use in the applications in fields such as food processing, agriculture and agro-based industries, biomedical and medical remediation, healthcare products, consumer products, numerous industries, pharmaceuticals, in diagnostics, orthopaedics, drug delivery, imaging, filters as antitumor agents and as enhancer of tumour-killing effects of anticancer drugs Recently,.AgNPs have been frequently used in many textiles, keyboards, wound dressings, and biomedical devices .  Nanosized metallic particles are unique and can considerably change physical, chemical, and biological properties due to their surface-to-volume ratio; therefore, these nanoparticles have been exploited for various purposes .

7. Applications of AgNPs

8. Aim and Objective Aim : Synthesis of Silver Nanoparticles by using Chemical  Synthesis method and Green Synthesis method. Objective : To synthesis silver nanoparticle by chemical synthesis method To synthesis silver nanoparticle by green synthesis method. To characterize the silver nanoparticle using UV - Visible Spectroscopy

9. Chemical Synthesis of AgNPs : Make assembly of ice bath. Take 15ml of stock solution of Sodium Borohydrate and dilute it in 100 ml of water. Take a conical flask coated with a aluminium foil and kept in ice bath and add magnetic needle in it and place on a magnetic stirrer. Take 90 ml of sodium borohydrate in a conical flask and stir it for 20 minutes on ice bath .  Add 6ml of silver Nitrate in dropwise manner . After 15 minutes add 2.5 ml of sodium citrate and stirr it for few minutes.

10. Green Synthesis of AgNPs   Take 10 ml silver nitrate solution (0.01 M) in a conical flask wrapped with aluminium foil.  Add 20% aqueous GT extract solution in a drop wise manner.  Add.5 ml NaOH (0.1M) were added to the mixture. The solution was then heated for 30 min at 50 °C in order to Increase the yield of AgNPs .  The GT AgNPs were separated by centrifugation (6000 rpm) And washed with 50% acetone and allowed to dry at room temperature.  The colour were Changed from dark-yellow brown to yellow. •

11. UV – Visible Spectroscopy  Graph of AgNPs by Chemical method 

12. Graph of AgNPs by Green synthesis method

13. Conclusion :

14. Thank you