Literature Review of the Article:
"A Green Method for the
Synthesis of Copper
Nanoparticles Using L-Ascorbic
Acid"
Objective: The study focuses on the green synthesis of copper nanoparticles (Cu-NPs) using L-
ascorbic acid (Vitamin C) as a reducing and capping agent, which ensures a cost-effective, non-toxic,
and environmentally friendly process.
Experimental Approach:
Materials: Copper (II) chloride as the precursor and L-ascorbic acid for reduction and stabilization.
Process: Aqueous solutions of copper chloride and varying concentrations of L-ascorbic acid were
mixed under controlled heating. The reaction was monitored through colour changes, indicative of
nanoparticle formation.
Characterization: Techniques like Atomic Absorption Spectrometry (AAS), Fourier Transform Infrared
Spectrometry (FT-IR), and X-Ray Diffraction (XRD) were employed to confirm nanoparticle size,
concentration, and stability. zeta potential
Findings:
Increasing L-ascorbic acid concentrations enhanced nanoparticle yield.
Cu-NPs showed an average size of 50–60 nm and were highly stable over 12 weeks without
sedimentation.
The process was validated as simple, reproducible, and safe, highlighting the dual role of L-ascorbic
acid in reduction and capping
What is a capping and reducing agent?
Reducing agent is to reduce the ions in the precursor solution. when we reduce ions, the formed
atom will combine to form a particle. particle size should be in nano range. in order to avoid further
growth and maintain particle in nano range, a substance called capping agent is added
Applications of Cu-NPs:
Antibacterial agents.
Catalysis.
Conductive inks for printed electronics.
Thermal transfer materials.
Advantages of the Method:
Avoids hazardous chemicals and reduces production costs.
Ensures better control over particle size and distribution.
Contributes to green chemistry by minimizing environmental impact.
VITAMIN C PREPERATION
1000 mg of vitamin c
Molecular weight of l ascorbic acid =176.12 g/mol
mass = M(v volume of solution how much to prepare for each concentration) MW(molecular weight)
ex:100 ml for each concentration
0.25M -> mass-= 0.25(0.1)(176.12)=4.403g (tablets in 100ml of water)
0.5m-> mass = 0.5(0.1)(176.12)=8.806g (tablets in 100ml of water)
0.75m->mass =0.25(0.1)(176.12)=13.209g (tablets in 100ml of water)
1m->mass=1(0.1)(176.12)=17.612g
(tablets in 100ml of water)
OR
0.25M -> mass-= 0.25(0.05)(176.12)=2.20g (tablets in 50ml of water)
0.5m-> mass = 0.5(0.05)(176.12)=4.403g (tablets in 50ml of water)
0.75m->mass =0.75(0.05)(176.12)=6.60g (tablets in 50ml of water)
1m->mass=1(0.05)(176.12)=8.806g
(tablets in 50ml of water)
