▎ 摘　　要

In this study, graphene oxide (GO) sheets were assembled with silver nanoparticles (AgNPs) and then combined with TiO2 nanotubes (TNTs) by gamma-ray irradiation at different doses (5, 10, 15, 20, and 25 kGy), to form GO-AgNPs-TNTs nanocomposites. Their physical and chemical properties were investigated using Fourier-transformed infrared, ultraviolet-visible (UV-Vis) adsorption, Raman and X-ray diffraction (XRD) spectroscopies. Field emission scanning electron and transmission electron (TEM) microscopies were applied for their morphology and structure observation. The obtained results indicated successful assemblage of silver nanoparticles on both GO sheets and TNTs, as well as significant effects of irradiation dose on nanocomposites' characteristics. Photocatalytic activity of the material was determined by the photodegradation efficiency on rhodamine B dye solution. All nanocomposite samples were revealed to possess good photocatalytic activity, with the highest obtained decoloration efficiency value of 81.21%. Noticeably, the photocatalytic activity of all nanocomposite samples was higher than that of their sole components. With all obtained results, gamma-ray irradiation was demonstrated to be a good technique for the synthesis of nanocomposite materials and GO-AgNPs-TNTs nanocomposite proclaimed high potential for pollutants removal and wastewater purification.