Green Synthesis of Silver and Gold Nanoparticles using leaf extract

Procedure

Synthesis of Silver Nanoparticles

  1. Preparation of Silver Nitrate Solution:Dissolve 0.1 g of silver nitrate in 100 mL of distilled water to make a 1 mM solution.
  2. Preparation of Green Reducing Agent:Prepare an extract from green tea by boiling 5 g of dried tea leaves in 100 mL of distilled water for 10 minutes. Cool and filter the extract.
  3. Synthesis Reaction:Add 10 mL of the silver nitrate solution to 50 mL of the green leaf tea extract in a beaker.Stir the mixture at room temperature for 30 minutes. A color change from pale yellow to dark brown indicates the formation of silver nanoparticles.
  4. Characterization : Use UV-Vis spectroscopy to confirm the presence of silver nanoparticles by analyzing the absorption peak around 420 nm.


Synthesis of Gold Nanoparticles
  1. Preparation of Gold Chloride Solution: Dissolve 0.1 g of gold chloride in 100 mL of distilled water to make a 1 mM solution.
  2. Preparation of Green Reducing Agent: Prepare an extract from leaves by blending 50 g of plant leaves with 100 mL of distilled water and filtering the solution.
  3. Synthesis Reaction: Add 10 mL of the gold chloride solution to 50 mL of the leaf/pomegranate extract in a beaker.Stir the mixture at room temperature for 30 minutes. The color change from yellow to red or purple indicates the formation of gold nanoparticles.