The co-catalyst plays an important role for improving the catalysis efficiency in Fenton system. In this paper, a new co-catalyst, CuS-Cu₉S₈ micro-flower was successfully prepared by a facilely hydrothermal method. The effect of co-catalysis for CuS-Cu₉S₈ micro-flower was evaluated by degradation of Rhodamine B (RhB) in Fenton system, and the RhB solution could be degraded 90% in 15 min in the CuS-Cu₉S₈ co-catalytic Fenton system under optimal condition, which is apparently better than that of the conventional Fenton system (59%). And EPR result shows that the unsaturated S atoms on the surface of CuS-Cu₉S₈ can capture protons to form H₂S and expose more Cu⁺/Cu²⁺ active sites on the surface of CuS-Cu₉S₈ flower. The high co-catalytic activity of CuS-Cu₉S₈ on pollutant degradation can be attributed to the acceleration for the rate-limiting Fe²⁺/Fe³⁺conversion by the exposed Cu⁺ /Cu²⁺ redox pairs. The cycle experiments show that CuS-Cu₉S₈ has excellent chemical stability and reusability.

助催化剂对于提高Fenton体系的催化效率起着重要作用。本文采用简便的水热法成功制备了新型助催化剂CuS-Cu ₉ S ₈微花。通过在Fenton体系中降解若丹明B（RhB）评估了CuS-Cu ₉ S ₈微花的共催化效果，并且在15分钟内在CuS-Cu ₉ S _8中RhB溶液可以降解90％。最佳条件下的Fenton共催化体系，明显优于常规Fenton体系（59％）。EPR结果表明CuS-Cu ₉ S ₈表面的不饱和S原子可以捕获质子形成H ₂ S，并在CuS-Cu ₉ S ₈花的表面上暴露更多的Cu ⁺ / Cu ²⁺活性位点。CuS-Cu ₉ S ₈对污染物降解的高共催化活性可以归因于暴露的Cu ⁺ / Cu ²⁺氧化还原对加速了限速Fe ²⁺ / Fe ³⁺转化。循环实验表明，CuS-Cu ₉ S ₈具有优异的化学稳定性和可重复使用性。