Abstract: CoFe₂O₄ nanoparticles were prepared by organic synthesis of acetylacetone salt, CoFe₂O₄ nanoparticles were compounded with MXene, C₃N₄ and AC to construct magnetic composites. The degradation rates of rhodamine (RhB) at the absorption peak (λ=555 nm) under ultraviolet (UV) and visible light irradiation were measured by UV-visible spectrophotometer, respectively. The experimental results show that the matrix/load composites are obtained, which can separate the photocatalyst from the liquid environment under strong magnetic action. Under UV light, the order of the photocatalytic activity of the four samples is AC@CFO>MX@CFO>CFO>C₃N₄@CFO. Under 400—780 nm visible light, the order of photocatalytic activity of the four samples is AC@CFO>C₃N₄@CFO>CFO>MX@CFO.

Key words: composite, magnetic separation, photocatalytic property, degradation rate