Synthesis of platinum nanoparticles using palm leaves extract as reducing agent / Nur Afiqah Arham
Platinum are mainly used as excellent catalyst for oxidation and hydrogenation processes in petrochemical industry. The conventional physical and chemical methods of synthesis platinum nanoparticles are not only energy intensive, because of severe conditions, but also environmentally unfriendly, due...
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| Format: | Thesis |
| Language: | English |
| Published: |
2016
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| Online Access: | https://ir.uitm.edu.my/id/eprint/99146/1/99146.pdf https://ir.uitm.edu.my/id/eprint/99146/ |
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| Summary: | Platinum are mainly used as excellent catalyst for oxidation and hydrogenation processes in petrochemical industry. The conventional physical and chemical methods of synthesis platinum nanoparticles are not only energy intensive, because of severe conditions, but also environmentally unfriendly, due to the use of toxic solvents or additives. Therefore biological synthesis of nanoparticles is always preferred since biological method is easier than the other methods, ecofriendly and less time consuming especially the biosynthesis methods which utilizes plant extracts. The plant phytochemicals with antioxidant or reducing properties are usually liable for reduction of metal compounds into nanoparticles. Hence the purpose of this research to extract reducing agents from palm leaves through water-based extraction method and used the palm extract to synthesis platinum nanoparticles. The effect of metal salt concentration and plant extract percentage on platinum ions conversion and the size distribution of the platinum nanoparticles were studied. The conversion of platinum ions was determined by atomic absorption spectroscopy (AAS). A greater conversion of platinum ions to nanoparticles was achieved by employing 10% of palm leaves extract with ImM of H2PtCl6. The platinum nanoparticles were characterized by fourier-transform infrared spectroscopy (FTIR), transmission electron spectroscopy (TEM) and energy-dispersive absorption xray spectroscopy (EDX). FTIR showed revealed that compounds such as hydroxyl, carbonyl and amine groups act as reducing agents for platinum ions reduction. EDX confirmed the presence of platinum element. The TEM result showed that platinum nanoparticles of less than 5nm size have been synthesized by reduction of H2PtCl6 using palm leaves extract at room temperature. |
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