Cobalt doped CeO₂ nanoparticles (Co-CeO₂ NPs) were prepared in a media that contained Salvadoral persica extract, cerium nitrate, and cobalt sulfate. The analytical methods of PXRD, UV–vis, DRS, BET, FESEM, EDX, and Raman were used to determine the morphology and size of synthesized un-doped and cobalt doped cerium oxide nanoparticles with the percentage of 1–10 %. The spherical shape of synthesized nanoparticles and the size of about 5−30 nm were confirmed through the obtained FESEM results. In addition, PXRD and EDX outcomes were indicative of the well doping of Co into the crystal lattice of CeO₂ nanoparticles. We also examined the photocatalytic activity of synthesized nanoparticles on Acid Orange 7 (AO7) dye and realized that the amount of Co doped CeO₂ can be effective on the photocatalyst performance. The best photocatalytic performance was observed and recorded in the case of 7 % Co doped CeO₂ NPs. Furthermore, the impacts of operational parameters such as pH and concentration of AO7 were evaluated on the activity of 7 % Co doped CeO₂ NPs. In conformity to the gathered data, the conditions of AO7 at pH = 5 with 1 g loading of 7 % Co doped CeO₂ NPs exhibited the highest percentage of removal (95.4 %) in 180 min and subsequent to performing 4 cycles, only 13.2 % of the photocatalytic activity was declined.

在包含Salvadoral persica提取物，硝酸铈和硫酸钴的介质中制备了钴掺杂的CeO ₂纳米颗粒（Co-CeO ₂ NP）。使用PXRD，UV-vis，DRS，BET，FESEM，EDX和Raman的分析方法确定合成的未掺杂和钴掺杂的氧化铈纳米颗粒的形态和尺寸，其比例为1-10％。通过获得的FESEM结果证实了合成纳米颗粒的球形和约5-30 nm的尺寸。此外，PXRD和EDX结果表明Co很好地掺杂到CeO _2的晶格中纳米粒子。我们还检查了合成的纳米粒子在酸性橙7（AO7）染料上的光催化活性，并意识到掺Co的CeO ₂的量可以对光催化剂的性能有效。在7％Co掺杂的CeO ₂ NP的情况下，观察到并记录了最佳的光催化性能。此外，评估了诸如pH和AO7浓度等操作参数对7％Co掺杂的CeO ₂ NPs活性的影响。根据收集的数据，在pH = 5且负载1 g的7％Co掺杂的CeO ₂ NP的AO7条件下，在180分钟内表现出最高的去除百分比（95.4％），随后进行4个循环，仅去除13.2％光催化活性的下降。