In this study, MnCoO₃@Al₂O₃ (MCA) was synthesized using a simple sol-gel method a4nd investigated as a catalyst for Polyvinyl alcohol (PVA) textiles degradation via hydrogen peroxide (H₂O₂) activation. The structures and properties of MCA were characterized using XRD, SEM, XPS, BJH and EDS. The optimum conditions of PVA degradation, such as MCA load, catalyst dosage, initial pH value and H₂O₂ concentration were explored. It was found that the removal rate of PVA under the conditions of 1000 mg/L MCA, initial pH = 3 and 2.934 ∗ 10³ mM H₂O₂ reached 98.6%. The reusability of MCA catalyst was tested for 5 consecutive cycles. The intermediate degradation products of PVA were tested by GCMS, and the possible way of PVA degradation was suggested. Moreover, the existence of OH^∙ was confirmed to be the main radicals through quenching experiment. Finally, the degradation pathways of PVA in the MCA/H₂O₂ system was proposed. In conclusion, this study put forward MCA as a heterogeneous catalyst to activate H₂O₂ for the degradation of PVA, which could be an excellent application in wastewater treatment.

在这项研究中，使用简单的溶胶-凝胶法合成了MnCoO ₃ @Al ₂ O ₃（MCA），并研究了该催化剂作为通过过氧化氢（H ₂ O ₂）活化降解聚乙烯醇（PVA）纺织品的催化剂。用XRD，SEM，XPS，BJH和EDS对MCA的结构和性能进行了表征。探索了聚乙烯醇降解的最佳条件，如MCA负载量，催化剂用量，初始pH值和H ₂ O ₂浓度。发现在1000 mg / L MCA，初始pH = 3和2.934 * 10 ³  mM H ₂ O ₂的条件下PVA的去除率达到98.6％。测试MCA催化剂的可重复使用性连续5个周期。通过GCMS测试了PVA的中间降解产物，并提出了PVA降解的可能途径。此外，通过淬灭实验证实了OH ^∙的存在是主要的自由基。最后，提出了MCA / H ₂ O ₂系统中PVA的降解途径。综上所述，本研究提出了MCA作为多相催化剂来活化H ₂ O ₂降解PVA，在废水处理中具有良好的应用前景。