摘要
The reduced graphene oxide（RGO）/γ-A1OOH hybrids with different γ-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 γ-AlOOH nanoplatelets help to adsorb the target metal ions on the electrode surface, thus faci- litating the electrochemical behavior of the hybrids. The sensitivity of as-prepared RGOγ-AlOOH hybrids toward Pb（II） was tested by square wave anodic stripping voltammograms（SWASV）and the mass ratio of graphene to γ-AlOOH was optimized to improve the sensing performance of RGOγ-AlOOH hybrids. Owing to the superior ab- sorbability of γ-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 1.5× 10^-11 mol/L with optimized γ-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 RGOγ-AlOOH hybrids demonstrate high electrochemical activity and good sensing performance, which offers an alternative platform for the electrochemical sensors.
The reduced graphene oxide（RGO）/γ-A1OOH hybrids with different γ-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 γ-AlOOH nanoplatelets help to adsorb the target metal ions on the electrode surface, thus faci- litating the electrochemical behavior of the hybrids. The sensitivity of as-prepared RGOγ-AlOOH hybrids toward Pb（II） was tested by square wave anodic stripping voltammograms（SWASV）and the mass ratio of graphene to γ-AlOOH was optimized to improve the sensing performance of RGOγ-AlOOH hybrids. Owing to the superior ab- sorbability of γ-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 1.5× 10^-11 mol/L with optimized γ-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 RGOγ-AlOOH hybrids demonstrate high electrochemical activity and good sensing performance, which offers an alternative platform for the electrochemical sensors.
基金
Supported by the National Natural Science Foundation of China（No.51125011）.
