In order to better understand capacitive deionization (CDI), a potential technique for effective water purification, this study synthesises and characterises graphene oxide (GO)-based nanocomposites. Energy efficiency and environmental sustainability are two benefits of CDI, which works by using electrical double-layer capacitors to adsorb ions from aqueous solutions onto oppositely charged electrodes. In order to increase the ion adsorption capacity and operational stability of CDI electrodes, this work focuses on optimising their desalination efficiency by integrating GO with different nanomaterials.