As a stable and inexpensive UV-absorber, TiO₂ is widely used in UV-shielding products. However, its poor compatibility with matrix polymers and photocatalytic degradation hazard still limit its performance. Herein, we construct the crystalline-amorphous TiO₂/Ce₂O₃ heterojunctions with an average size of 15 nm via an in-situ solvothermal process, significantly reducing the photocatalytic activity through the carrier redistribution between TiO₂ and Ce₂O₃. In the photocatalytic experiments for the degradation of three dyes (RhB, MB, and RR-120), the apparent reaction rate constants (k) of the optimal sample TiO₂/Ce₂O₃-3 % are 33.92, 28.54, and 24.78 times lower than those of pure TiO₂, respectively. The characterizations and theoretical calculations together reveal that the photogenerated carriers accumulate on the amorphous Ce₂O₃ with rich defects, promoting the recombination of electron-hole pairs and reducing the carriers’ redox potential. Additionally, oleyl phosphate (OP) is used for surface modification to achieve TiO₂/Ce₂O₃ organic solvent-dispersible and improve its compatibility with matrix polymers, thus the UV-shielding OP-TiO₂/Ce₂O₃/fluorocarbon hybrid coating is prepared with high transparency.

_{TiO 2}作为一种稳定且廉价的紫外线吸收剂，广泛应用于紫外线屏蔽产品中。然而，其与基体聚合物的相容性差和光催化降解危险仍然限制了其性能。在此，我们通过原位溶剂热法构建了平均尺寸为15 nm的晶态-非晶态TiO ₂ /Ce ₂ O _{3异质结，通过TiO 2}和Ce ₂ O ₃之间的载流子重新分布显着降低了光催化活性。_{在三种染料(RhB、MB和RR-120)的光催化降解实验中，最佳样品TiO 2} /Ce ₂ O ₃ -3 %的表观反应速率常数(k)分别为33.92、28.54和24.78分别比纯TiO ₂低几倍。表征和理论计算共同表明，光生载流子在缺陷丰富的非晶Ce ₂ O ₃上积累，促进了电子-空穴对的复合，降低了载流子的氧化还原电位。此外，采用油基磷酸酯(OP)进行表面改性，使TiO ₂ /Ce ₂ O ₃有机溶剂分散，提高其与基体聚合物的相容性，从而制备出具有紫外屏蔽功能的OP-TiO ₂ /Ce ₂ O ₃ /氟碳杂化材料。制备的涂层具有高透明度。