Optical Properties of Aluminium Oxide Nanoparticles Synthesized by Leaf Extract of Ocimum sanctum

Preeti Sharma,Nidhi ,Neera Sharma,Neelam

doi:10.30799/jnst.273.19050419

Abstract

In the present work aluminium oxide nanoparticles are synthesized using leaf extract of <i>Ocimum sanctum</i>. The synthesized sample was characterized by XRD, HR – TEM, UV – Vis, FTIR and PL. It is found that aluminium oxide nanoparticles synthesized by leaf extract are stable and show good optical properties. This method of synthesis is less toxic and cost of synthesis is low as compared to other chemical and physical methods. By XRD pattern phase of synthesized aluminium oxide nanoparticles is confirmed and the average particle size is found to be 19.43 nm. By HR - TEM analysis, the particle size of synthesized nanoparticles ranges from 18 nm to 25 nm. By UV – visible spectroscopy the energy band gap is found to be 2.55 eV. By FTIR analysis presence of Al–O band and biofunctional group is confirmed. Photoluminescence spectroscopy confirmed the energy band gap of as synthesized alumina nanoparticles is 2.19 eV. Hence, from the present study, it is concluded that aluminium oxide nanoparticles synthesized by plant leaf extract are good semiconductors.<div><br></div>

Highlights

Nanoparticles are of great interest of research in every field due to their very large surface to volume ratio
There are many physical and chemical methods for the synthesis of Aluminium oxide nanoparticles some of which are ball milling, spray combustion, hydrothermal, sputtering, sol-gel, microwave and laser ablation [5,6,7,8,9,10,11]
The average particle size of the nanoparticles calculated by above formula comes out to be 19.43 nm

Summary

Introduction

Nanoparticles are of great interest of research in every field due to their very large surface to volume ratio. Aluminium oxide is a compound of Aluminium and oxygen having chemical formula Al2O3. It is very hard, chemically inert, has high melting point, non- volatile and it has resistance to oxidation and corrosion [1,2,3,4,5]. The nanoparticles of aluminium oxide can be widely used in every field of science and engineering because of their interesting properties such as high stability, hardness, insulation, tunable mechanical properties etc. These nanoparticles can be used in the treatment of waste water [9], as organic light emitting devices (OLEDs), solar selective coatings, bar code readers, optical lenses and windows [10]

Methods

Results

Conclusion