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采用共沉淀法-焙烧制备纳米铁酸铜催化剂,利用扫描电镜(SEM)、X射线光电子能谱(XPS)和X射线衍射(XRD)对催化剂进行表征。以酸性红FRL为降解目标物,研究此催化剂催化过硫酸钠降解酸性红FRL的性能。考察了氧化剂浓度、催化剂用量和初始染料浓度对降解的影响。结果表明:催化剂经700℃焙烧3 h,可得到完整晶相的Cu Fe2O4;当初始污染物浓度为20 mg/L,过硫酸盐浓度为2.0 g/L,催化剂用量为2.0 g/L时,降解2.5 h,酸性红FRL染料溶液的降解率可达85.3%。实验所得催化剂可重复使用5次,同时酸性红FRL降解过程遵循准一级动力学方程。
The catalyst was characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). With acidic red FRL as the degradation target, the performance of this catalyst for the degradation of acid red FRL by sodium persulfate was studied. The effect of oxidant concentration, catalyst dosage and initial dye concentration on degradation was investigated. The results show that when the catalyst is calcined at 700 ℃ for 3 h, the complete crystalline phase of CuFe2O4 can be obtained. When the initial concentration of contaminants is 20 mg / L, the concentration of persulfate is 2.0 g / L and the amount of catalyst is 2.0 g / L, Degradation 2.5 h, acid red FRL dye solution degradation rate of up to 85.3%. The experimental catalyst can be reused five times, while the acid red FRL degradation process follows the first-order kinetic equation.