▎ 摘　　要

A novel sensor containing 1-pyrenebutyric acid modified beta-cyclodextrin (pyrenecyclodextrin) decorated reduced graphene oxide for the detection of trinitrophenol is described. After modification with pyrenecyclodextrin, the sensor exhibits a high sensitivity to trinitrophenol. The radicals, formed during the reduction of trinitrophenol, were reduced electrochemically on the electrode. The reduction current was proportional to the concentration of trinitrophenol in the solution. The effects of pH and applied potential on the analytical performances of the sensor are investigated. Under the optimal conditions, the proposed sensor exhibited a wide linearity for trinitrophenol detection from 1 mu M to 440 mu M, and the detection limit was down to 0.358 mu M. The improved performance can be attributed to the unique structure of beta-cyclodextrin (hydrophobic internal cavity and hydrophilic external surface), which endows this material with great tendency to integrate with hydrophobic -NO2 groups of trinitrophenol. Thus, this novel sensor will have promising applications for analyzing and sensing phenols with -NO2 groups.