Cobalt-based catalysts were synthesized using the molten metal salt method and applied for the degradation of reactive dyeing wastewater. The results demonstrated a degradation of 97.1% for the C.I. Reactive Red 195 solution under the following conditions: 1.0 g/L of Co@MXene, 3 g/L of peroxymonosulfate (PMS), treated at 25 ^oC for 36 min with initial pH of 7. After adding 20 g/L of NaCl, the dye degradation rate increased to 5.57 times compared to the original rate 0.0894 min⁻¹, but the difference in final degradation was not significant. The enhanced degradation was attributed to the combined action of hydroxyl radicals (•OH), sulfate radicals (SO₄^•−), and singlet oxygen (¹O₂). Notably, the Co@MXene catalyst maintained a high dye degradation percentage of 93.5% even after being recycled ten times. The treated dye residue can be recycled for dyeing cotton fabrics with reactive dyes. This study achieves rapid treatment of dye wastewater with wide applicability and provides valuable insights into dye wastewater treatment and environmental remediation.

采用熔融金属盐法合成钴基催化剂，并将其应用于活性印染废水的降解。结果表明，在以下条件下，CI 活性红 195 溶液的降解率为 97.1%：1.0 g/L Co@MXene、3 g/L 过一硫酸盐 (PMS)，在初始 pH 值和 25 ^o C 下处理 36 分钟7.添加20 g/L NaCl后，染料降解率比原来的0.0894 min ^-1增加到5.57倍，但最终降解率差异不显着。增强的降解归因于羟基自由基(•OH)、硫酸根(SO ₄ ^•− ) 和单线态氧( ¹ O ₂ ) 的联合作用。值得注意的是，Co@MXene 催化剂即使在回收十次后仍保持着 93.5% 的高染料降解率。处理后的染料残渣可回收用于活性染料对棉织物的染色。该研究实现了染料废水的快速处理，具有广泛的适用性，为染料废水处理和环境修复提供了有价值的见解。