Hybrid luminescent materials of graphene oxide and rare-earth complexes with stronger luminescence intensity and better thermal stability

Abstract

It is a huge challenge to synthesize high luminescent performance of graphene oxide-rare earth hybrid materials, due to the strong quenching effect of graphene oxide. Herein we reveal a novel graphene oxide/rare-earth complexes hybrid materials that the Eu3+-2-thenoyltrifluoroacetone (TTA)-pyromellitic acids (PMA) were deposited on the surface of graphene oxide sheets (GOSs) via noncovalent approach between GOSs and PMA. This materials exhibit stronger luminescence intensity, longer decay lifetime and better thermal stability than pure Eu3+ complexes. It is confirmed by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction and luminescent data. Moreover, we observed PMA plays a significant role in improving the luminescence intensity and prolonging the decay lifetime of hybrid materials.