Synthesis and Characterization of Hybrid Graphene Oxide/Gold Nanoparticle

摘要

Nanostructures has been recognized in achieving high level of functionality for not be able to reach from bulk materials. However, hybrid nanostructured materials have proven that it can increase these functionalities such as reactivity and conductivity through improvement of chemical, physical and environmental stability. The objectives of this research are to understand the synthetization method of hybrid GO/Au nanoparticles and analysis of characteristics of GO/Au nanoparticles based on its thermal degree, morphology of size and molecular bonding. GO/Au nanoparticles has been synthesis using one-step synthesis method from GO and Au as precursors where GO is synthesis using Hummer's method. Synthesizing of GO/Au nanoparticle required sodium citrate as stabilizing agent. A mixture of GO/Au is sonicated in sonicator for 2 hours then dried in an oven for 2 hours before centrifuging it at 700 rpm for 6 mins and dried it in an oven overnight will gives powder GO/Au hybrid nanoparticles. The synthesized nanoparticles are further characterized using UV-VIS, TGA, FTIR and FESEM analysis. UV-vis analysis peak absorbance of GO at 255 nm with 2.612Au and GO/Au nanoparticles at 320 nm with 2. 569Au. Thermogravimetric analysis result shows both GO and GO/Au nanoparticles shows that there is significant weight loss in GO as compared to GO/Au nanoparticles. FTIR analysis result shows GO and GO/Au nanoparticles have same phenols and alcohols functional group with different % transmittance. As for GO, carboxylic functional group is presence with C=O bonding as carbon and oxygen exist in GO sample. This is supports by EDX analysis showing that carbon element in GO is 61.26 weight % and oxygen is 38.47 weight %. Whilst in GO/Au nanoparticles, alkynes functional group is presence with C≡C bonding stretch. This is supports by EDX analysis showing gold element is higher than carbon element at 53.06 weight % and 35.92 weight % respectively. FESEM analysis showed that wrinkle formation