Abstract
This paper discusses with the synthesis of nanoparticles of ZnO and ZnO-SiO2 nanocomposite by sol–gel method. Characterisation studies are taken for each sample and compared with previous literatures. Therefore, the synthesized particles were characterized by FTIR, SEM, XRD & BET analysis to obtain chemical bonding, surface morphology, crystallinity and surface area of the particles respectively micrographs of ZnO nanoparticles show hexagonal shaped ZnO and ZnO-SiO2 nanocomposite revealed an increase in particle agglomeration. In order to understand the crystallite size of ZnO and ZnO-SiO2 nanocomposite were found to be 44.37 nm and 34.09 nm respectively. Practically, both synthesized ZnO and ZnO-SiO2 nanocomposite applied for the preparation of biodiesel applications. Biodiesel is an alternative to petroleum-based diesel that is biodegradable, non-toxic and being less polluting. Based on the literatures, they produced biodiesel from waste cooking oil using transesterification process with ZnO and ZnO-SiO2 nanocomposite as heterogeneous catalysts. The fame conversion was confirmed by FTIR and GCMS analysis. The prepared biodiesel was characterized by its physical and fuel properties like density, kinematic viscosity, flashpoint and calorific value.
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