Perovskite oxides ABO₃ with unique structure showed promising performance on persulfates activation. Previous research work mainly focused on Co-based or rare earth metal (La, Sr)-based perovskite oxides for peroxymonosulfate (PMS) activation. Here, we firstly studied perovskite CaMnO₃ metal oxide composed with the low cost and eco-friendly Ca and Mn elements in PDS activation. Perovskite CaMnO₃ metal oxide achieve the superior catalytic activity for reactive oxygen species generation than the regular Mn oxides (β-MnO₂ and Mn₂O₃) and other types Ca_xMn_yO_z (spinel-type CaMn₂O₄ and Ca₂MnO₄) solid solution due to the tolerance of Mn multivalence and defect in the perovskite structure and the excellent Mn³⁺/Mn⁴⁺ redox capacity in CaMnO₃. The CaMnO₃/PDS system could be applied at a wide pH range from 4 to 12, and exhibited better performance in basic condition. Different active species including SO₄•⁻, •OH reactive radicals and singlet oxygen ¹O₂ were found and responsible for effective pollutants degradation. Our study shows eco-friendly perovskites possess great potential in the refractory organic pollutants removal by catalytic activation of PDS.

具有独特结构的钙钛矿氧化物ABO ₃在过硫酸盐活化方面显示出令人鼓舞的性能。先前的研究工作主要集中在钴基或稀土金属（La，Sr）基钙钛矿氧化物上，以进行过氧单硫酸盐（PMS）活化。在这里，我们首先研究了在PDS活化过程中由低成本且环保的Ca和Mn元素组成的钙钛矿CaMnO ₃金属氧化物。钙钛矿CaMnO ₃的金属氧化物实现活性氧产生比普通的Mn的氧化物（β-MnO的优异的催化活性₂和Mn ₂ ö ₃）和其它类型的Ca _X锰_ý Ô _ž CaMn（尖晶石型₂ ö₄和Ca ₂ MnO ₄）固溶体，这是由于Mn的多价公差和钙钛矿结构缺陷以及CaMnO _3的Mn ³⁺ / Mn ⁴⁺优良的氧化还原能力。CaMnO ₃ / PDS体系可在4至12的宽pH范围内使用，在碱性条件下表现出更好的性能。不同的活性物质，包括SO ₄ • ^-，•OH反应性自由基和单线态氧¹ O ₂被发现并负责有效的污染物降解。我们的研究表明，环保型钙钛矿在通过催化活化PDS去除难处理的有机污染物方面具有巨大潜力。