LaFeO₃@TiO₂ heterojunction composites with a core-shell porous structure and LaFeO₃ contents in the 2.5−25 wt.% range have been synthesized via consecutive sol-gel syntheses and tested for the photocatalytic oxidation of the myclobutanil pesticide in water under solar light and pure visible light. Whatever the light spectrum, the kinetic rate constants for both myclobutanil degradation and TOC conversion exhibited a volcano-like profile with increasing the narrow band-gap (2.1 eV) LaFeO₃ content, the optimum composite strongly overperforming both single phases, with full myclobutanil mineralization achieved in 240 min in the best case. The light spectrum influenced the optimum LaFeO₃ content in the composite, being observed at 5 wt.% and 12.5 wt.% under solar and visible light, respectively. This has been attributed to the existence of different light-mediated reaction mechanisms. The optimum LaFeO₃/TiO₂ composite photocatalyst was active and stable after several runs under solar light with leached iron concentration below 0.1 mg/L in solution.

通过连续的溶胶-凝胶合成法合成了具有核-壳多孔结构且LaFeO ₃含量为2.5-25 wt％范围的LaFeO ₃ @TiO ₂异质结复合材料，并测试了其在阳光下在水中对甲基氯丁腈农药的光催化氧化作用。光线和纯净可见光。无论光谱如何，霉菌丁酮降解和TOC转化的动力学速率常数均显示出类似火山的剖面，并随着窄带隙（2.1 eV）LaFeO ₃含量的增加，最佳复合材料明显优于两个单相，并具有完整的霉菌丁酮矿化作用最好的情况是在240分钟内达到。光谱影响了最佳的LaFeO ₃分别在太阳光和可见光下观察到的复合材料的含量为5 wt。％和12.5 wt。％。这归因于存在不同的光介导的反应机制。最佳的LaFeO ₃ / TiO ₂复合光催化剂在太阳光下经过多次运行后，溶液中铁的含量低于0.1 mg / L时具有活性且稳定。