▎ 摘　　要

In this paper, a novel modified graphene oxide sheets (GOSs) has been synthesized based on pyromellitic acid (PMA) depositing on the surface of GOSs via noncovalent approach. Fourier Transform Infrared spectra (FT-IR), X-ray diffraction patterns (XRD) and scanning electron microscopy (SEM) were adopted to investigate its structure. The as-prepared materials are dispersed in Rhodamine-B (RB) solutions which show highly efficient fluorescence. This phenomenon suggests the quenching effect of graphene oxide can be effectively weakened via rational structural modification. Moreover, this dispersion serving as a fluorescent probe still has a relatively high selectivity and sensitivity (Stern-Volmer constant K-SV = 4.58*10(4) L mol(-1)) to Fe3+ ions. (C) 2018 Elsevier B.V. All rights reserved.