Structural And Optical Properties Of Zinc Oxide Nanoparticles Synthesize Via Sol Gel Auto Combustion Method

Lee, Seih Chung (2017) Structural And Optical Properties Of Zinc Oxide Nanoparticles Synthesize Via Sol Gel Auto Combustion Method. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The aim of this study is to evaluate the structural and optical properties of ZnO nanoparticles synthesized via sol gel auto combustion method.Firstly,zinc nitrate and citric acid mixed together and heated at 250 oC.Ammonia solution was then added to the solution to neutralize it to the pH 7.Products ashes were produced in black color are proceed to the calcinations process to remove the impurities in the ashes.This method consumed less energy compared to other method to synthesize ZnO nanoparticles. Different citrate to nitrate ratio is formulated in this study to achieve auto combustion reaction.It yielded high purity of ZnO nanoparticles after the calcinations process.The reaction during the synthesis processes were investigated via the thermal evaluations.The structural properties of ZnO nanoparticles was characterized by X-ray diffraction (XRD) to study the crystallinity,lattice constant, and crystallite size. The presence of ZnO nanoparticles was confirmed by Fourier Transform Infrared (FTIR) and X-ray diffraction (XRD).Ultra-violet Visible Spectroscopy is a useful method to investigate the optical properties of ZnO nanopaticles.Optical properties of ZnO nanoparticles were influenced by the nanoscale particles.It was observed that the larger the particle size,the better the optical properties.This work shows that the sol gel auto combustion reaction is an effective method to synthesize ZnO nanoparticles.

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