Cerium (Ce) and Europium (Eu) doped TiO₂ thin films photocatalysts were synthesized using sol gel spin coating method coated on silicon wafers. SEM-EDX micrographs revealed that the surfaces were formed by compact grains and were covered by large aggregates. XRD and RAMAN analysis showed that the crystalline anatase TiO₂ is the dominant phase. The photoactivity of the films was investigated based on the degradation of Amido Black dye (AB), chosen as a model pollutant, under UV irradiation. Photodegradation of AB was investigated by varying the catalyst, initial solution pH and dye concentrations. Results showed that Eu-TiO₂ photocatalysts (0.1 wt%) exhibited the best enhancement of photoactivity performance in AB removal, reaching a reaction rate of 0.029 min⁻¹ and t_1/2 was around 25 min, under an optimal pH value of 3.5 and AB concentration of 10 ppm, which was faster than pure TiO₂ and Ce-TiO₂ films. The TiO₂ doping with Ce: 1 wt% or Eu: 0.1 wt% is corresponding to the optimal concentration for better electron/hole separation. EIS measurements conducted in alkaline medium proved that Ce-TiO₂(1 wt%) and Eu-TiO₂(0.1 wt%) photocatalysts possessed a lower electron transfer resistance than pure TiO₂, which can lead to an effective separation of photogenerated electron/hole pairs during the photodegradation reactions.

采用溶胶凝胶旋涂法在硅片上制备了铈(Ce)和铕(Eu)掺杂的TiO ₂薄膜光催化剂。SEM-EDX 显微照片显示表面由致密颗粒形成并被大聚集体覆盖。XRD和RAMAN分析表明结晶锐钛矿TiO ₂是主要相。基于在紫外线照射下被选为模型污染物的酰胺黑染料 (AB) 的降解，研究了薄膜的光活性。通过改变催化剂、初始溶液 pH 值和染料浓度来研究 AB 的光降解。结果表明，Eu-TiO ₂光催化剂（0.1 wt%）在AB去除中表现出最佳的光活性增强，反应速率达到0.029 min^-1和 t _1/2大约为 25 分钟，在 3.5 的最佳 pH 值和 10 ppm 的 AB 浓度下，这比纯 TiO ₂和 Ce-TiO ₂薄膜更快。掺杂 Ce: 1 wt% 或 Eu: 0.1 wt%的 TiO ₂对应于更好的电子/空穴分离的最佳浓度。在碱性介质中进行的 EIS 测量证明，Ce-TiO ₂ (1 wt%) 和 Eu-TiO ₂ (0.1 wt%) 光催化剂比纯 TiO ₂具有更低的电子转移电阻，这可以导致光生电子/光降解反应中的空穴对。