▎ 摘　　要

A composite of 1,8,15,22-tetraamino zinc phthalocyanine (ZnTAPc) covalently bound to benzoic acid-functionalized graphene (BFG) was used for photodegradation of rhodamine B (RhB) for the first time. The formation of an amido bond between ZnTAPc and BFG has been confirmed by Fourier transform infrared spectroscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. For photodegradation of RhB in water, the as-prepared ZnTAPc-10% BFG composite exhibits much stronger visible-light catalytic activity than pure ZnTAPc. This effect can be attributed to the high pollutant adsorption performance of ZnTAPc-BFG, the increased light absorption and the effective charge transfer and separation. In addition, the excess BFG (15%) in the composite results in a significant decrease in photocatalytic efficiency, due to the decrease of the adsorption sites and catalytic active centers. The ZnTAPc-10% BFG composite photocatalyst, with high photocatalytic efficiency and reusability, is potentially applicable in environmental purification of organic pollutants.