Highly sensitive electrochemical sensing of para-chloronitrobenzene using a carbon nanohorn-nanotube hybrid modified electrode

摘要

The widespread presence of para-chloronitrobenzene (PCNB) has caused serious impacts on the environmental agencies and human health, hence the quantitative and qualitative sensing of PCNB is very important. Herein, a novel three-dimensional nanohybrid composed of carbon nanohorns and carbon nanotubes (CNH-CNT) was prepared via a simple ultrasonication process, and then, the obtained CNH-CNT nanohybrid was used to modify an electrode for the electrochemical sensing of PCNB. Under the optimized conditions, the results showed that the CNH-CNT nanohybrids could exhibit electrochemical sensing performance toward PCNB detection due to the synergetic properties of CNHs and CNTs, and a wide linear range from 0.1 to 70.0 mM and a low detection limit of 5.9 nM were obtained for the determination of PCNB. Finally, the developed method was successfully applied in the determination of PCNB in real water samples.