▎ 摘　　要

The reduced graphene oxide(RGO)/gamma-AlOOH hybrids with different gamma-AlOOH contents were successfully prepared via a facile one-pot hydrothermal method. In these hybrids, RGO acts as a conductive linker for improving electron transport, and gamma-AlOOH nanoplatelets help to adsorb the target metal ions on the electrode surface, thus facilitating the electrochemical behavior of the hybrids. The sensitivity of as-prepared RGO/gamma-AlOOH hybrids toward Pb(II) was tested by square wave anodic stripping voltammograms(SWASV) and the mass ratio of graphene to gamma-AlOOH was optimized to improve the sensing performance of RGO/gamma-AlOOH hybrids. Owing to the superior absorbability of gamma-AlOOH for heavy metal ions and excellent electrical conductivity of graphene, the detection limit of the hybrids for heavy metal ions was found to be as low as 1.5x10(-11) mol/L with optimized gamma-AlOOH content in the hybrids. The experimental conditions, such as pH value, mass of electrode material, and deposition time were also investigated and optimized. The as-prepared RGO/gamma-AlOOH hybrids demonstrate high electrochemical activity and good sensing performance, which offers an alternative platform for the electrochemical sensors.