微米α-Fe2O3非均相电Fenton降解罗丹明B

Degradation of Rhodamine B by Heterogeneous Electro-Fenton Method withα-Fe2O3 Micron Particles

以考察非均相电Fenton法处理罗丹明B(RhB)的影响因素为目的,采用水热法制备α-Fe2O3微米颗粒,钛涂钌铱(Ti/RuO2-IrO2)电极为阳极和阴极,组成非均相电Fenton体系降解RhB废水,探讨了微米α-Fe2O3投加质量浓度、pH和电流密度对RhB降解效果的影响,以及催化剂的循环使用效果。结果表明:当微米α-Fe2O3投加质量浓度为0.5 g/L,pH为3.0,电流密度为12 mA/cm2时,反应60 min后,非均相电Fenton体系对RhB的去除率可达97.42%,且催化剂循环使用3次后,仍可以保持95%以上的去除率,具有较好的稳定性。

α-Fe2O3 micron particles are prepared by hydrothermal method,and with the titanium coated Ru-Ir electrode(Ti/RuO2-IrO2)as anode and cathode material,the heterogeneous Electro-Fenton system is formed to degrade Rhodamine B(RhB).The structure and morphology of catalysts are studied by X-ray diffraction(XRD),and scanning electron microscope(SEM).The effects of dosage ofα-Fe2O3 micron,pH value and current density on Rhodamine B degradation are discussed.The experimental results show a 97.42%removal efficiency in about 60 min.Under the optimum conditions that theα-Fe2O3 micron dosage is 0.5 g/L,the initial pH value is 3.0,and the current density is 12 mA/cm2.