▎ 摘　　要

Capacitive deionization (CDI) is an emerging technology offering a green and efficient route to obtain clean water. According to its basic working mechanism, the covalent bond attached three-dimensional graphene/carbon nanotubes hybrid (G-CNTs) can be considered a promising material for CDI performance. In this paper, we present a novel strategy to improve wettability through moderate oxidation treatment for G-CNTs-based CDI electrodes because the poor wettability of G-CNTs will limit electrosorption performance. The results showed that the activated G-CNTs-1 h exhibited good cycling stability performance and high electrosorption capacity of 8.45 mg g(-1) when the initial concentration of NaCl was 500 mg L-1, more than twice that of the pristine G-CNTs (3.95 mg g(-1)). This work may provide a new insight into the future pretreatment of graphene or carbon nanotube based CDI electrode materials.