A novel three-dimensional (3D) manganese oxide (MnO_X) hierarchical microflowers materials were prepared and applied to activate peroxymonosulfate (PMS) for the removal of phenol. The 3D α-MnO₂ material exhibited higher catalytic activity than 3D Mn₂O₃ and 3D Mn₃O₄ materials, with 100% phenol removal within 60 min. The quenching experiment and EPR results indicated that ¹O₂ played a major role in removing phenol, SO₄^•–, O₂^•– and ^•OH ranked second. The kinetic studies indicated that the removal of phenol followed the pseudo-first-order kinetic model, and the reaction activation energy of 3D α-MnO₂ material was 25.67 kJ mol⁻¹. Besides, factors of 3D α-MnO₂ catalytic performance such as catalyst dosage, PMS dose and reaction temperature were also investigated. This work provided a new approach for synthesizing 3D MnO_X catalysts with high-performance and guidance for analyzing the catalytic activity of multivalent metal oxides.

制备了一种新型三维（3D）氧化锰（MnO _X）多级微花材料，并将其用于活化过一硫酸盐（PMS）以去除苯酚。3D α-MnO ₂材料表现出比3D Mn ₂ O ₃和3D Mn ₃ O ₄材料更高的催化活性，在60 min内100%去除苯酚。猝灭实验和EPR结果表明，¹ O ₂对苯酚的去除起主要作用，SO ₄ ^•–、O ₂ ^•–和^• OH 次之。动力学研究表明，苯酚的去除遵循准一级动力学模型，3D α-MnO ₂材料的反应活化能为25.67 kJ mol ^-1。此外，还考察了催化剂用量、PMS用量和反应温度等影响3D α-MnO _{2催化性能的因素。}该工作为合成高性能3D MnO _{X催化剂提供了一种新方法，并为分析多价金属氧化物的催化活性提供了指导。}