This study reports a facile preparation of TiO_2-x/CoFe₂O₄ (black Ti³⁺ self-doped titania coupled with cobalt ferrite), an efficient sonocatalyst for ibuprofen (IBP) mitigation. Compared with TiO_2-x or CoFe₂O₄, TiO_2-x/CoFe₂O₄ heterojunction displayed enhanced sono-oxidation performance, and their immobilization onto diatomaceous earth (DE) further increased the oxidation rate. The effects of various parameters on sono-oxidation efficiency were studied, such as pH, IBP concentration, catalyst dosage, co-existing microplastics and chemicals, ultrasonic power and frequency, introduction of persulfate. About 96.0% of 10 mg/L IBP was removed in 100 min using 0.7 g/L catalyst at pH=6, with the ultrasonic power of 144 W and frequency of 60 KHz. Quenching experiment results demonstrated the roles of reactive species. The intermediates during IBP sono-oxidation were determined by HLPC-MS method, and the acute toxicity was studied. Furthermore, the reaction mechanism was proposed. The sonocatalyst revealed excellent reusability, suggesting itself promising for wastewater treatment.

这项研究报告了TiO _2-x / CoFe ₂ O ₄的简便制备方法（黑色Ti ³⁺自掺杂二氧化钛与钴铁氧体偶联），一种有效的布洛芬（IBP）缓解声催化剂。与TiO _2-x或CoFe ₂ O _4相比，TiO _2-x / CoFe ₂ O ₄异质结显示出增强的声氧化性能，并且将它们固定在硅藻土（DE）上进一步提高了氧化速率。研究了各种参数对声氧化效率的影响，例如pH，IBP浓度，催化剂用量，微塑料和化学品共存，超声功率和频率，过硫酸盐的引入。在pH = 6的条件下，使用0.7 g / L催化剂，在144 W的超声功率和60 KHz的频率下，在100分钟内去除了约96.0％的10 mg / L IBP。淬火实验结果证明了反应物种的作用。采用HLPC-MS法测定了IBP声氧化过程中的中间体，并对其急性毒性进行了研究。此外，提出了反应机理。声催化剂显示出极好的可重复使用性，