Abstract: Three preparation methods were used to modify a nano-TiO₂ catalyst to have hydrophobic properties. The hydrophobicity modification methods and influencing factors, as well as influencing factors of the catalytic reaction, were researched in visible light irradiation using high-concentration nitrobenzene as the object.The results showed: the catalysts prepared using the dropping and absorbing methods had complete crystal diffraction peaks of anatase TiO₂ and CuO, while catalysts prepared using the co-precipitate method did not have anatase TiO₂; theabsorption edges of catalysts by different methods reached 900 nm; and, the hydrophobic regions of dropping and absorbing catalysts were mostly long-chain alkyls, while those of co-precipitate catalysts were mostly short-chain alkyls. Degradation experiments showed that catalysts with long-chain alkyls had better catalytic ability, and the best catalysts were prepared by dropping method calcined under N₂, which degraded 75% of nitrobenzene within 2 h.