▎ 摘　　要

Herein, we were synthesized AgI-TiO2-graphene (G) nanocomposite photocatalyst by sonochemical method. The nanocmposites of AgI-TiO2-G, TiO2-G, and AgI-G and the hybrid of AgI-TiO2 were analyzed using X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, diffuse reflectance spectroscopy, photoluminescence, and fourier-transform infrared spectroscopy. The AgI-TiO2-G composite possessed high photocatalytic properties. The ternary composite with 4 wt% TiO(2 )and 50 wt% AgI showed enhanced photocatalytic degradation (90%) compared with that of pure graphene (36%), AgI-TiO2 (85%), bare TiO2 (61%), AgI (53%), TiO2-G (84%), and AgI-G (81%). According to the results, ultrasound irradiation had crucial effect on quality of nanoparticles and graphene sheets. The photocatalytic performances of all photocatalyst compounds were studied on decomposition of acid orange 7.