Preparation and characterization of graphene nanosheet by electrochemical exfoliation

• Main Authors: Chien-Jen Chen, 陳建仁
• Other Authors: Li-Hung Lin
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/83708643687378335637

碩士 === 國立嘉義大學 === 電子物理學系光電暨固態電子研究所 === 102 === Abstract Graphene has excellent electrical conductivity, mechanical properties, thermal conductivity, thermal stability, etc. Since 2004, single-layer graphene has become one of the most popular research targets via tap mechanical exfoliation. Much effort has been exerted recently into the high-yield production of individual graphene flakes two-dimensional (2D) atom-thick platelets of sp2-hybridized carbon atoms. This research focuses on using electrochemical exfoliation method to delaminate graphite into graphene flakes. Here, we exfoliated the graphite electrode into graphene flakes in the electrolytic solution by electro chemical effect, this electrochemical method is considered as a simple, low cost and rapid preparation of graphene. First, we used different electrolysis voltages (4 V, 8 V, 12 V) to exfoliate graphite and used sodium dodecylbenzenesulfonate (SDBS) as the electrolyte. After the electrolysis process, graphene flakes can distributed equally in solution without any treatment. Next, we used SEM to investigate the morphology of graphene and measured photoluminescence (PL) to investigate its unique optical properties.