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Gurusamy, Sivaprakash; Kulanthaisamy, Mohan Rasu; Hari, Dinesh Gujuluva; Veleeswaran, Ananthi; Thulasinathan, Boobalan; Muthuramalingam, Jothi Basu; Balasubramani, Ravindran; Chang, Soon Woong; Arasu, Mariadhas Valan; Al-Dhabi, Naif Abdullah; Selvaraj, Arokiyaraj; Alagarsamy, Arun
Journal of photochemistry and photobiology. B, Biology, 04/2019, Volume: 193Journal Article
TiO -ZnO heterogeneous catalytic system provides a good replacement of a homogeneous catalytic reaction due to its easier recovery. In this study, biodiesel was produced from Ulva lactuca seaweeds using TiO -ZnO nanocomposite catalysts with particle size of ~12 nm. The size controlled TiO -ZnO nanocomposite was characterized by powder XRD analysis and TEM. The result of that TiO -ZnO catalyst is a promising catalyst for the production of biodiesel under mild reaction conditions and high yield of hydroxydecanoic acid conversion of 82.8%. The various conditions optimized for the higher conversion to FAME (15.8 ml of FAME) were 4 wt% catalysts at 4 h under 60 °C and further there is no increase of conversion to FAME above 60 °C-80 °C. The total product yield was calculated as 82.8% of conversion to FAME. The evaluated biodiesel was found to be up to the mark of ASTM standards. The silver nanoparticles (AgNPs) were synthesized by using leftover biomass of algae obtaining after lipid extraction of U.lactuca. AgNPs particle size was achieved as ~12 nm and was confirmed by UV-Visible spectroscopy, XRD and TEM analysis. Antibacterial activities of the synthesized AgNPs were analyzed and compared. The antibacterial activity was excellent against bacterial pathogens and treatment against P. vulgaris shows the maximum zone of inhibition (13.8 mm). The present work identified that the unutilized bioresource such as U.lactuca can be effectively utilized for biodiesel production so as to replace fossil fuel usage.
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