merged

Effect of Acid Leaching On Production of Silica Nanoparticles from Coconut
Leaves
Nurul Husna Bt Ibrahim
Supervisor: Dr. Alyza Azzura Binti Abd Rahman Azmi
Co-Supervisor: Dr. Tuan Nurul Sabiqah Binti Tuan Anuar
Bachelor of Science (Analytical and Environmental Chemistry)
School of Marine and Environmental Sciences
Universiti Malaysia Terengganu
Silica nanoparticles are high quality silica that is used in many industrial areas. The
study was aimed at synthesis and characterization of silica nanoparticles from coconut
leaves by precipitation method. The sodium silicate solution was obtained by treated
with different concentration of acid and followed by alkaline extraction of grinded
coconut leaves. The sample was subjected to precipitation process by added H2SO4
with continuous stirring for 1 hour and pH were adjusted in order to produce
precipitated silica. The FT-IR results supported that the substance produced is silica.
The results show major peaks which are Si-OH stretching, Si-O-Si symmetry
stretching, Si-O-Si asymmetry stretching and Si-O-Si bending vibration. Besides,
through X-ray Diffractogram result shows a broad peak at (2θ) in range of 23° which
indicates that silica nanoparticles prepared is amorphous. The SEM image showed the
formation of aggregates silica nanoparticles. As conclusion, the production of
amorphous silica nanoparticles were successfully extracted through this study.
1964 | UMT UNDERGRADUATE RESEARCH DAY 2018