This study reports a facile preparation of Eu_xTi_1-xO_2-yN_y/CoFe₂O₄ (Eu/N-doped titania coupled with cobalt ferrite), an efficient photocatalyst for ibuprofen (IBP) oxidation from its solution under visible light. The heterojunction structure (Eu_xTi_1-xO_2-yN_y/CoFe₂O₄) enhanced the IBP photo-oxidation performance by promoting charge carrier mobility, and the immobilization of this heterojunction composite onto diatomaceous earth (DE) improved the adsorption ability towards IBP molecule from its solution, thus further improved the photo-oxidation efficiency. The effects of various factors on oxidation efficiency were studied, such as pH, IBP concentration, catalyst dosage, co-existing ions, microplastics and peroxymonosulfate (PMS). Quenching experiment results demonstrated the roles of reactive species. The intermediates and their acute toxicity were studied. Furthermore, the photocatalytic reaction pathway and mechanism were proposed. The reported photocatalyst revealed excellent reusability and stability, suggesting itself a promising approach for wastewater treatment.

这项研究报告了一种容易制备的Eu _x Ti _1-x O _2-y N _y / CoFe ₂ O ₄（Eu / N掺杂的二氧化钛与钴铁氧体偶联）的一种有效的光催化剂，可在溶液中从其溶液中氧化布洛芬（IBP）氧化。可见光。异质结结构（Eu _x Ti _1-x O _2-y N _y / CoFe ₂ O ₄）通过促进电荷载流子迁移率增强了IBP光氧化性能，并且将该异质结复合物固定在硅藻土（DE）上提高了其溶液对IBP分子的吸附能力，从而进一步提高了光氧化效率。研究了各种因素对氧化效率的影响，例如pH，IBP浓度，催化剂用量，共存离子，微塑料和过氧单硫酸盐（PMS）。淬火实验结果证明了反应物种的作用。研究了中间体及其急性毒性。并提出了光催化反应的途径和机理。报道的光催化剂显示出极好的可重复使用性和稳定性，表明它本身是一种有前途的废水处理方法。