Low Dimensional Materials Research Center, Physics Department, University of Malaya, Kuala Lumpur.
Int J Nanomedicine. 2012;7:3379-87. doi: 10.2147/IJN.S28189. Epub 2012 Jul 7.
A simple single-stage approach, based on the hydrothermal technique, has been introduced to synthesize reduced graphene oxide/titanium dioxide nanocomposites. The titanium dioxide nanoparticles are formed at the same time as the graphene oxide is reduced to graphene. The triethanolamine used in the process has two roles. It acts as a reducing agent for the graphene oxide as well as a capping agent, allowing the formation of titanium dioxide nanoparticles with a narrow size distribution (~20 nm). Transmission electron micrographs show that the nanoparticles are uniformly distributed on the reduced graphene oxide nanosheet. Thermogravimetric analysis shows the nanocomposites have an enhanced thermal stability over the original components. The potential applications for this technology were demonstrated by the use of a reduced graphene oxide/titanium dioxide nanocomposite-modified glassy carbon electrode, which enhanced the electrochemical performance compared to a conventional glassy carbon electrode when interacting with mercury(II) ions in potassium chloride electrolyte.
一种简单的单阶段方法，基于水热技术，已被引入用于合成还原氧化石墨烯/二氧化钛纳米复合材料。在将氧化石墨烯还原为石墨烯的同时形成了二氧化钛纳米颗粒。在该过程中使用的三乙醇胺具有两种作用。它既是氧化石墨烯的还原剂，也是封端剂，允许形成具有窄尺寸分布（约 20nm）的二氧化钛纳米颗粒。透射电子显微镜照片显示，纳米颗粒均匀分布在还原氧化石墨烯纳米片上。热重分析表明，与原始组件相比，纳米复合材料具有增强的热稳定性。通过使用还原氧化石墨烯/二氧化钛纳米复合材料修饰的玻碳电极证明了这项技术的潜在应用，与在氯化钾电解质中与汞（II）离子相互作用时，与传统的玻碳电极相比，该电极的电化学性能得到了增强。
