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Green Synthesis and Characterization of Silica Nanoparticles from Coconut
Leaves
Nurul Nadiatul Anis Binti Mohd Sukri
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 were produced from dry coconut leaves as they were inexpensive
waste materials. The methods used included acid treatment followed by alkaline
solubilization to produce sodium silicate solution. The sodium silicate was titrated with
hydrochloric acid (HCl) until pH 7 to neutralize it. It is burned in furnace at 600
°C for 4 hours to form amorphous silica. Eventually, dry coconut leaves could
produce high quality silica using environmental friendly technique. The concentration
of HCl as precipitate agent also was considered as main parameter with the aim to
investigate the optimum condition for formation of silica nanoparticles. The result of
FTIR spectrum showed Si-O bending, Si-O-Si symmetric stretching, Si-O-Si asymmetric
stretching bond vibration at range of 472, 808 and 1090 cm¹ respectively. The result
of XRD pattern and SEM of silica nanoparticles identified a broad peak at 2θ=23° and
spherical shape. The results revealed that amorphous silica nanoparticles successfully
produced.
1965 | UMT UNDERGRADUATE RESEARCH DAY 2018