A ZnMn₂O₄ catalyst has been synthesized via a sucrose-aided combustion method and characterized by various analytical techniques. It is composed of numerous nanoparticles (15–110 nm) assembled into a porous structure with a specific surface area (SSA) of 19.1 m²·g⁻¹. Its catalytic activity has been investigated for the degradation of orange II dye using three different systems, i.e., the photocatalysis system with visible light, the chemocatalysis system with bisulfite, and the photochemical catalysis system with both visible light and bisulfite. The last system exhibits the maximum degradation efficiency of 90%, much higher than the photocatalysis system (15%) and the chemocatalysis system (67%). The recycling experiments indicate that the ZnMn₂O₄ catalyst has high stability and reusability and is thus a green and eximious catalyst. Furthermore, the potential degradation mechanisms applicable to the three systems are discussed with relevant theoretical analysis and scavenging experiments for radicals. The active species such as Mn(III), O₂^•−, h⁺, e_aq⁻, SO₄^•− and HO^• are proposed to be responsible for the excellent degradation results in the photo-chemical catalysis system with the ZnMn₂O₄ catalyst.

通过蔗糖辅助燃烧法合成了ZnMn ₂ O ₄催化剂，并通过各种分析技术对其进行了表征。它由许多纳米颗粒（15–110 nm）组成，这些纳米颗粒组装成具有19.1 m ² ·g ^-1的比表面积（SSA）的多孔结构。。使用三种不同的系统，即可见光的光催化系统，亚硫酸氢盐的化学催化系统以及可见光和亚硫酸氢盐的光化学催化系统，研究了其对橙色II染料降解的催化活性。最后一个系统具有90％的最大降解效率，远高于光催化系统（15％）和化学催化系统（67％）。循环实验表明，ZnMn ₂ O ₄催化剂具有较高的稳定性和可重复使用性，因此是一种绿色环保的催化剂。此外，通过相关的理论分析和自由基清除实验，讨论了适用于这三个系统的潜在降解机理。Mn（III），O等活性物质₂ ^{• -}，H ⁺，电子_水溶液^-，SO ₄ ^{• -}和HO ^•提出负责优异退化导致在光化学催化系统与ZnMn ₂ Ó ₄催化剂。