▎ 摘　　要

Graphene oxide loaded with titanium dioxide composites (GO-TiO2) was successfully prepared by hydrolysis of titanium tetrachloride in the presence of an aqueous dispersion of graphene oxide, and characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), and X-ray diffraction (XRD). Characterized results exhibited that TiO2 was successfully loaded on the surface of GO. Adsorptive removal of tetracycline (TC) by GO-TiO2 and photocatalytic regeneration of adsorbent was investigated. Adsorption isotherms of TC onto GO-TiO2 proved that the adsorption process was multilayered, and the adsorption capacity of GO-TiO2 for aqueous TC in the tested range was 99.46, 117.98, and 133.05 mg/g at 15, 25, and 35 degrees C, respectively. TC adsorption by GO-TiO2 followed the pseudo-second-order kinetic model. TC adsorption by GO-TiO2 was favored at lower pH and decreased with an increase of solution pH. Additionally, Ca2+ had a more powerful inhibiting effect on TC adsorption by GO-TiO2 than K+ and Na+. The regeneration experiment demonstrated that the TC saturated GO-TiO2 could be easily recovered and regenerated by the photolysis under UV irradiation and the regenerated GO-TiO2 still showed high adsorption affinity for TC in solution.