In this paper, different NaOH concentrations (2, 5, 10, and 15 M) were used to treat {001}TiO₂. The effect of NaOH on the crystal structure, morphology, optical properties, light raw electronic-hole recombination, and degradation performance of {001}TiO₂ on methylene blue were studied. The results demonstrate that rutile TiO₂ appeared when the NaOH concentration was as high as 10 M, showing much better photolytic performance than others. As the concentration of sodium hydroxide increases, the morphology changes accordingly. The specific surface area increases and the optical electronic-hole recombination rate decreases. Radical scavenging tests showed that hydroxyl radical and hole are very important in photocatalysis.

The efficient photocatalytic degradation of tetracycline hydrochloride by three-dimensional flower-like TiO₂/TiOF₂.

Cu ₂ O@TiOF ₂ /TiO ₂ composites with large surfaces were prepared by a hydrothermal method and exhibited excellent activity under simulated solar light, showing high efficiency for tetracycline hydrochloride photocatalytic degradation, and reusability.