In this work, reduced graphene oxide (rGO), Co₃O₄, and rGO–Co₃O₄ composites were successfully synthesized while their catalytic activity was evaluated regarding the degradation of tetracycline (TC) by persulfate (S₂O₈²⁻) activation process in aqueous solutions. Surface morphologies, composition, and structure of the as produced materials were investigated with the aid of different techniques such as XRD, SEM, EDX, FT-IR, and BET analysis. The catalytic activity of rGO–Co₃O₄ composite was evaluated regarding TC degradation by K₂S₂O₈ (PS). The results revealed that pure Co₃O₄, rGO, and rGO–Co₃O₄ were successfully synthesized. Co₃O₄ sample presented spinel structure, with an average diameter of 26.7 nm while C/O ratio in rGO sample was about 3.2. rGO–Co₃O₄ composite significantly enhanced the removal of TC with a typical efficiency of over twofold compared to sole Co₃O₄.

About 96% of TC (5 mg/L) were decomposed by rGO–Co₃O₄/PS catalytic system after 60 min at room temperature. The catalytic performance of rGO–Co₃O₄/PS system was affected by pH of solutions, TC initial concentration, catalyst dosage, and PS concentration. The rGO–Co₃O₄/PS system degraded the most TC in aqueous solutions at the following condition: rGO = 200 mg/L, pH₆, TC = 5 mg/L, and PS = 0.3 mM; it was shown to be a perspective recyclable potential with a TC removal efficiency of more than 84% after three reuse cycles.

TC degradation process fitted the pseudo-first order kinetics the most (r² = 0.98 for optimal condition), corresponding to a 0.023 min⁻¹ rate constant. Both HO^• and SO₄^•- radicals generated from the rGO–Co₃O₄/PS system were primarily species that degraded TC in solutions.

在这项工作中，成功地合成了还原氧化石墨烯（rGO），Co ₃ O ₄和rGO–Co ₃ O ₄复合材料，同时评估了它们对过硫酸盐（S ₂ O ₈ ^2-）降解四环素（TC）的催化活性。）在水溶液中的活化过程。借助不同的技术（例如XRD，SEM，EDX，FT-IR和BET分析）研究了所生产材料的表面形态，组成和结构。评估了K ₂ S ₂ O ₈对TC降解rGO–Co ₃ O ₄复合材料的催化活性。（PS）。结果表明，成功地合成了纯Co ₃ O ₄，rGO和rGO–Co ₃ O ₄。Co ₃ O ₄样品呈现尖晶石结构，平均直径为26.7 nm，而rGO样品中的C / O比约为3.2。与单独的Co ₃ O ₄相比，rGO–Co ₃ O ₄复合材料显着提高了TC的去除效率，典型效率是其两倍。

室温下60分钟后，rGO–Co ₃ O ₄ / PS催化系统分解了约96％的TC（5 mg / L）。rGO–Co ₃ O ₄ / PS系统的催化性能受溶液的pH值，TC初始浓度，催化剂用量和PS浓度的影响。在以下条件下，rGO–Co ₃ O ₄ / PS系统降解水溶液中的TC最多：rGO = 200 mg / L，pH ₆，TC = 5 mg / L，PS = 0.3 mM；在三个重复使用周期后，它显示出可回收利用的远景潜力，TC去除效率超过84％。

TC降解过程最适合拟一级动力学（ 对于最佳条件，r ² = 0.98），对应于0.023 min ^-1的速率常数。rGO–Co ₃ O ₄ / PS系统产生的HO ^•和SO ₄ ^•自由基都是降解溶液中TC的物质。