▎ 摘　　要

Zn-doped Titanium dioxide nanoparticles decorated on graphene sheets (ZT-GR) were synthesized via one step hydrothermal method. This method was to mix graphene oxide with Zn-doped Titanium dioxide in ethanol through a certain. The photocatalytic activity of this catalyst was assessed by photodegradation of tetracycline to verify. Graphene oxide amount and hydrothermal temperatures were discussed in this article. We discovered that the photocatalytic activity of Zn-doped TiO2 nanoparticles decorated on graphene is much higher than Zn-doped TiO2 nanoparticles through photocatalytic degradation experiments. Zn-doped TiO2 on graphene sheets sample exhibited the highest photocatalytic activity when the graphene oxide amount was 5%, the hydrothermal temperature was 140 degrees C, the hydrothermal time was 24 hours. Graphene decorating not only narrowed the band gap also increased the optical absorption into visible region. The optimal degradation rate of TC by using the catalyst of Zn-doped TiO2 nanoparticles decorated on graphene sheets was 98.5%. And graphene oxide decorating exhibited a good effect of degradation for tetracycline under visible light.