▎ 摘　　要

The combination of graphene oxide and different porphyrins is attracted much attention as optical limiting systems. In this article, three novel porphyrins covalently functionalized GO nanohybrids (TPP-GO, TTP-GO and TPP-GO-TTP) have been designed and synthesized by covalent functionalization approach. The formation of these nanohybrids has been confirmed by various spectroscopic techniques including Fourier transform infrared spectroscopy, Raman, scanning electron microscope images, X-ray photoelectron spectroscopy and thermogravimetric analysis. Raman spectra and photophysical studies demonstrated effective charge transfer effect from the porphyrins to the GO. The as-prepared nanohybrids exhibited superior nonlinear absorption and optical limiting performances exciting by the 4 ns laser pulses, significantly better than their components due to more effective charge transfer effect. Particularly, the TPP-GO-TTP ternary nanohybrid showed the best nonlinear optical and optical limiting properties in comparison with those of other both binary nanohybrids, highlighting the influence of the introduction of different porphyrins on the photophysical and optical limiting performances of the as-prepared nanohybrids.