A wide range of heterogeneous catalysts has been used for degradation of dyes through various techniques, albeit, little is recognized about the productive activation of hydrogen peroxide (HP), persulfate (PS), and ozone over heterogeneous catalysts and under UV light irradiation. In this research, Cr and Ce were placed within the magnetite structure and the resultant nanoparticles were characterized by XRD, SEM, HRTEM, EDX, BET, VSM, DRS, XPS, and FT-IR analyses. The synthesized magnetic nanoparticles were used in a series of photocatalytic processes for the degradation of methylene blue dye (MBD) as a probe molecule. The Fe_2.5Cr_0.2Ce_0.3O₄ sample showed great performance in comparison with the other samples. The highest activity of Fe_2.5Cr_0.2Ce_0.3O₄ sample was described based on its ability to effectively actuate HP, PS, and ozone under UV light irradiation. The outcomes of the studied systems: catalyst, UV, and UV-catalyst alone and along with oxidants were well illustrated in contrast to one another. In this regard, the effects of HP and PS concentrations and ozone inlet flow rate were evaluated. The results postulated that the ozone-based systems had eminent efficiency in the degradation of MBD. In each process, the reusability of the Fe_2.5Cr_0.2Ce_0.3O₄ sample was studied and the superior stability of the catalyst was inferred. The mineralization efficacy of MBD was appraised by total organic carbon (TOC) and the order of TOC removal capacity was found as UV-catalyst-PS > UV-catalyst-ozone>UV-catalyst-HP. Eventually, GC–MS analysis of the oxidized samples confirmed the formation of 8 intermediates by the UV-catalyst-ozone system.

各种各样的非均相催化剂已通过各种技术用于降解染料，尽管人们很少认识到过氧化氢（HP），过硫酸盐（PS）和臭氧在非均相催化剂上以及在紫外线照射下的生产活化。在这项研究中，Cr和Ce被放置在磁铁矿结构中，并且通过XRD，SEM，HRTEM，EDX，BET，VSM，DRS，XPS和FT-IR分析对所得纳米颗粒进行了表征。合成的磁性纳米颗粒用于一系列光催化过程中，以降解亚甲基蓝染料（MBD）作为探针分子。Fe _2.5 Cr _0.2 Ce _0.3 O ₄该样品显示出与其他样品相比的出色性能。Fe _2.5 Cr _0.2 Ce _0.3 O ₄样品具有最高的活性，是基于其在紫外线照射下有效激活HP，PS和臭氧的能力而描述的。研究的系统的结果：催化剂，紫外线和单独的紫外线催化剂以及与氧化剂一起被很好地说明了彼此之间的对比。在这方面，评估了HP和PS浓度以及臭氧入口流速的影响。结果推测，基于臭氧的系统在MBD降解方面具有显着的效率。在每个过程中，Fe _2.5 Cr _0.2 Ce _0.3 O ₄的可重复使用性对样品进行了研究，并推断出催化剂的优异稳定性。用总有机碳（TOC）对MBD的矿化效果进行了评价，发现TOC去除能力的顺序为：UV-PS> UV-臭氧> UV-HP。最终，对氧化后的样品进行GC-MS分析，证实了紫外线催化剂-臭氧系统可形成8种中间体。